Hey all,
Awhile ago there was a thread about electrolytic capacitors popping and
then destroying the motherboard they are on. One of the ideas was to
replace them before they go.
Now I was wondering about another idea... Would it be okay to encase
the capacitor in silicone gel? Then when the capacitor pops, it wouldn't
spread its electrolyte all over the motherboard.
But would this cause other problems with heat or something? Would it
further shorten the life of the capacitor?
Cheers,
Bryan
>> Heck, things like the first appearance of Superman get about $15,000, and
>> I would consider that WAY more collectible than the first issue of
>> MacWorld even WITH signatures.
>
>Ummmm.... I believe the going rate for the first appearance of Superman in
>Action Comics #1 is over $100,000....
I can't say I am surprised. Its been a LONG time since I looked into
comic values (I have a box of a few #1's around, but I don't think of
anything worth much).
Either way... MacWorld ain't the first appearance of Superman, heck, it
ain't even the first appearance of the Mac!
-chris
<http://www.mythtech.net>
>The people bidding on this magazine have no idea what they're doing. I
>have at least 2-3 copies of this issue (san autographs, but still).
Yeah, I can't imagine it being too rare.
There is a store where I vacation (jersey shore), that sells old
magazines and the likes. With a few odd execptions, nothing ever seems to
go for more than about $50 max. (Exceptions include things like an
unaltered copy of the Traci Lords issue of Penthouse, I think they wanted
$125 for that... although I would think selling it would actually be
illegal since she was under 18 for the shoot).
Heck, things like the first appearance of Superman get about $15,000, and
I would consider that WAY more collectible than the first issue of
MacWorld even WITH signatures.
-chris
<http://www.mythtech.net>
>>I think anybody that would pay that kind of money without a LOT more
>>proof of authenticity is an idiot! A rich idiot perhaps but an idiot
>>none the less.
>I noticed that the seller has zero feedback so they must be new to E-bay
>(or they've changed their identity). Sounds like a grand formula for a
>rip-off to me!
Unfortunately, a positive feedback (say, in the hundreds) also does
not guarantee that you won't get ripped-off. I recently (well,
November of last year), purchased something through ebay from someone
who had about 140+ for their feedback... and very few negatives.
I sent them the payment for the item ($300+) and although they kept
sending emails about how they were going to get it out to me, with
some extras due to the delay, the person never did ship the item.
His contact information was totally bogus (the mail-to address was
different from what the person had on file with ebay, which I didn't
get until it was too late and I was reporting a problem). The
phone number was no good (again, I didn't have that until there was
a problem).
Now, the person's account is inactive...
So, don't assume anything from a feedback profile value...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com |
| | |
| "this space | (s/ at /@/) |
| unavoidably left blank" | URL: http://world.std.com/~mbg/ |
| | "pdp-11 programmer - some assembler |
| (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+
I have a 19" HP monitor that is free to anyone who can collect, or
arrange collection, from east Berkshire.
This is a 3/5 BNC connected beastie (sync-on-green or separate sync) and
is the perfect companion to a 700 series workstation.
There is some screen-burn , but the monitor is perfectly usable.
This monitor is taking up too much space, so it's time to overcome the
hoarding instinct and pass it on.
Cheers,
Dave.
On Feb 9, 19:24, Brian Chase wrote:
> Does anyone have details on the following ROM or PROM chips from a
> DEC VAXstation 4000 VLC? Their identifying numbers are LUP9327580
> (DEC part# 23-286E8-00) and LUP9331604 (DEC part# 23-287E8-00);
> they're each 40-pin DIPs. The U's may actually be O's or 0's; it's
> difficult to tell given the DEC part number label placement.
23-xxxEx is a ROM/EPROM part number, so they may well be programmable.
E8 means they're 128KB, or 1 Megabit. The part numbers you quote are
listed in Compaq Assisted Services online catalogue at $4 apiece, so
you might still be able to get them from DEC/HP.
Is there any type number under the DEC label? Are they brown ceramic
with a quartz window in the top? If so, they're probably EPROMs, most
likely 27C1024 (64K x 16 bit). If not, they're probably one-time
PROMs, or possibly Flash. If they're EPROMs, it's unlikely you
overwrote them, unless you had them in a programmer.
--
Pete Peter Turnbull
Network Manager
University of York
Just get an HP 200LX palmtop. It's basically a PC-XT (MS-DOS 5.0, custom
80186 processor) with a monochrome CGA screen (640x200). It can run most
standard MS-DOS programs, has built-in terminal emulation, serial and IR
ports, a PCMCIA socket that can handle standard of Compact Flash RAM (cards
bigger than 256MB might require a driver, depending on brand). You can get
upgraded models with up to 96MB internal RAM and a 2x crystal (~32MHz). Runs
on 2 AA batteries for days, and can use rechargable batteries (with internal
charging). Has instant-on and sleep. There is ethernet and TCP/IP software
for it, as well as web and email software. Lastly, you can hook it up to a
cell phone to get your email. Only problem is, it's not quite 10 years old
:).
-----Original Message-----
From: John Boffemmyer IV [mailto:john_boffemmyer_iv@boff-net.dhs.org]
Sent: Saturday, February 08, 2003 7:44 PM
To: cctech(a)classiccmp.org
Subject: Re: Odd ideas that I've had lately...
<snip>
Say, I go over to Sridhar's house
and decide I want to grab the docs on an old DECServer, most palms don't
have the storage space or interface unless you go find a program written
for the machine you are on and have an IR port or happen to have a Palm
cradle for that model (nowadays one cradle does NOT fit all). A mini-PC
portable, like the idea I had, would have standard built-in interfaces that
would allow for this, plus the needed storage space. Like simple FTP'ing
the data over a standard tcp/ip protocol on the built-in Ethernet or such,
this would make portable data sharing easier.
<snip>
Tony,
> While this is true on the genuine PS/2 machines (and the mouse protocol
> is very similar to a PC/AT or PS/2 keyboard protocol), there's no reason
> why it _has_ to be. It would be possible to make an ISA card with a
> programmed microcontroller on it (maybe an 8042, like the keyboard
> controller) with the host port at some otherwise unused I/O address, and
> then use a special driver (similar in concept to the serial and bus mouse
> drivers) to access it.
well, I suppose if you're going to go the microcontroller route you may as well
make it an external unit with the serial controller included... no messing
around with custom drivers on the host system then. Bit beyond me though I'm
afraid, but as the original poster said I'm surprised nobody's done it,
especially a hobbyist...
I suppose it'd need its own power supply though which is a shame.
cheers
Jules
Everything you'll ever need on one web page
>from News and Sport to Email and Music Charts
http://uk.my.yahoo.com
> I'm either being imprecise or various readings I have done were
>imprecise. The reference to "one cycle" instruction may have been referring
>to there being 2 cpu cycles per clock cycle. Also, there's the "pipelining"
>some say the 6502 does when the last (or only) byte of an instruction is
>acted upon simultaneous to next instruction's 1st byte (opcode) being
>fetched
Hi Everyone,
I have recently researched this but it is not true. The so called
"pipelining"
was just that internally when the CPU does an ADD instructions it
does some sub-operations currently. This was hyped in some texts
by using (wrongly) the word "pipelining". Normally, "pipelining" for micros
refers to
overlaping the fetch of one instruction with the "execute phase" of
the previous instruction. The 6502 does none of this. Note, the Z8
actually does some limited pipelining. This put it ahead in bragging rights
amongs the 8-bitters.
Cheers,
Paul
----- Original Message -----
From: <cctech-request(a)classiccmp.org>
To: <cctech(a)classiccmp.org>
Sent: Saturday, February 08, 2003 1:00 PM
Subject: cctech digest, Vol 1 #360 - 29 msgs
> Send cctech mailing list submissions to
> cctech(a)classiccmp.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://www.classiccmp.org/mailman/listinfo/cctech
> or, via email, send a message with subject or body 'help' to
> cctech-request(a)classiccmp.org
>
> You can reach the person managing the list at
> cctech-admin(a)classiccmp.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of cctech digest..."
>
>
> Today's Topics:
>
> 1. Re: Assembly on a Apple IIc+ (Sellam Ismail)
> 2. Re: Unassembled Superboard II (Sellam Ismail)
> 3. Re: Assembly on a Apple IIc+ (Sellam Ismail)
> 4. Kaypro II available. (Alan Emmerson)
> 5. Re: WANTED: RA7x Enclosure/Operator Ctrl. Panel (Eric Dittman)
> 6. Re: interesting find (Tony Duell)
> 7. Re: MicroVAX 3800 Power Cable (Tony Duell)
> 8. Re: Rookie HP-85 problem (Tony Duell)
> 9. Re: Old Computer Companies (John Honniball)
> 10. Re: Assembly on a Apple IIc+ (Mike Ford)
> 11. RE: WANTED: RA7x Enclosure/Operator Ctrl. Panel (John Willis)
> 12. Re: MicroVAX 3800 Power Cable (pete(a)dunnington.u-net.com)
> 13. RE: Looking for source of MFM or RLL drives (Kelly Leavitt)
> 14. RE: Disk drive head locking (DEC RA-82 and HP 7920) (John Willis)
> 15. RE: Looking for source of MFM or RLL drives (John Willis)
> 16. Re: Rookie HP-85 problem (Joe)
> 17. Re: Old computers from HP, maybe? Anybody know where HP is
> collecting/storing them? (Fred Cisin (XenoSoft))
> 18. Re: Old computers from HP, maybe? Anybody know where HP is
> collecting/storing them? (John Allain)
> 19. Re: Looking for source of MFM or RLL drives (Jerome H. Fine)
> 20. Re: Old computers from HP, maybe? Anybody know where HP is
> collecting/storing them? (R. D. Davis)
> 21. RE: Atari ST Help (Lawrence Walker)
> 22. TTY ASR-33 Platen? (George R. Gonzalez)
> 23. Re: Assembly on a Apple IIc+ (Jim Keohane)
> 24. Re: Assembly on a Apple IIc+ (Jim Keohane)
> 25. Re: Grundy Newbrain fix (lgomez)
> 26. OT Need parts (James Rice)
>
> --__--__--
>
> Message: 1
> Date: Fri, 7 Feb 2003 15:27:17 -0800 (PST)
> From: Sellam Ismail <foo(a)siconic.com>
> To: <cctalk(a)classiccmp.org>
> Subject: Re: Assembly on a Apple IIc+
> Reply-To: cctech(a)classiccmp.org
>
> On Fri, 7 Feb 2003, Hans Franke wrote:
>
> > I used BigMac for all my projects, including the doomed SSC
> > ROM... (*1)
> >
> >
> > Gruss
> > H.
> > (*1) I don't know if I already told the story
>
> I told you I would optimize your code for you :)
>
> Sellam Ismail Vintage Computer
Festival
> --------------------------------------------------------------------------
----
> International Man of Intrigue and Danger
http://www.vintage.org
>
> * Old computing resources for business and academia at
www.VintageTech.com *
>
> --__--__--
>
> Message: 2
> Date: Fri, 7 Feb 2003 15:34:32 -0800 (PST)
> From: Sellam Ismail <foo(a)siconic.com>
> To: <cctalk(a)classiccmp.org>
> Subject: Re: Unassembled Superboard II
> Reply-To: cctech(a)classiccmp.org
>
> On Fri, 7 Feb 2003, Bill Sudbrink wrote:
>
> > Vintage Computer Festival wrote:
> > > Someone sent me an unassembled Ohio Scientific Superboard II kit in
its
> > > original box the other day.
> >
> > Oh! You lucky son-of-a-gun! What REV?
>
> The solder mask on the board says "Ohio Scientific Model 600 CPU" and "REV
> D".
>
> The manual is copyright 1982 and the original invoice is dated August 4,
> 1982.
>
> Sellam Ismail Vintage Computer
Festival
> --------------------------------------------------------------------------
----
> International Man of Intrigue and Danger
http://www.vintage.org
>
> * Old computing resources for business and academia at
www.VintageTech.com *
>
> --__--__--
>
> Message: 3
> Date: Fri, 7 Feb 2003 15:40:34 -0800 (PST)
> From: Sellam Ismail <foo(a)siconic.com>
> To: <cctalk(a)classiccmp.org>
> Subject: Re: Assembly on a Apple IIc+
> Reply-To: cctech(a)classiccmp.org
>
> On Fri, 7 Feb 2003, Jim Keohane wrote:
>
> > p.s. I also did quite well with 6502 asm code in cpu speed tests vs
> > 80x86 and Z80 programmers. The zero page, for all intents and purposes,
> > is 256 registers. 6502 is single cycle instruction execution. Look up
> > definitions of RISC and the 6502 is arguably RISC-like.
>
> No 6502 instruction takes less than 2 cycles to complete.
>
> Sellam Ismail Vintage Computer
Festival
> --------------------------------------------------------------------------
----
> International Man of Intrigue and Danger
http://www.vintage.org
>
> * Old computing resources for business and academia at
www.VintageTech.com *
>
> --__--__--
>
> Message: 4
> From: "Alan Emmerson" <aje(a)technet2000.com.au>
> To: <classiccmp(a)classiccmp.org>
> Subject: Kaypro II available.
> Date: Sat, 8 Feb 2003 09:44:55 +1000
> Reply-To: cctech(a)classiccmp.org
>
> I have two Kaypro II that I have owned from new. Both are upgraded to run
> at higher clock speeds and one has a cooling fan fitted. One has the PC8
> ROM There is a complete set of the bundled distribution software (Select,
> Perfect Writer etc) with manuals, including that really first class
ground
> breaking program SBasic, and other programs that I wrote in SBasic
> including multi variable non linear regression analysis. Also Unidos and
> etc which allows the floppy drives to emulate those of other machines.
>
>
> I used one of these machines to run the first simulation of the CSIRO
> Sydney to Melbourne high speed railway.
>
> What price might one expect for such a a machine?.
>
> Alan Emmerson
> Brisbane QLD
> Australia
>
> --__--__--
>
> Message: 5
> From: Eric Dittman <dittman(a)dittman.net>
> Subject: Re: WANTED: RA7x Enclosure/Operator Ctrl. Panel
> To: cctalk(a)classiccmp.org
> Date: Fri, 7 Feb 2003 17:46:03 -0600 (CST)
> Reply-To: cctech(a)classiccmp.org
>
> > Wanted: RA7x Enclosure/Operator Ctrl. Panel
>
> Where are you located?
> --
> Eric Dittman
> dittman(a)dittman.net
> Check out the DEC Enthusiasts Club at http://www.dittman.net/
>
> --__--__--
>
> Message: 6
> From: ard(a)p850ug1.demon.co.uk (Tony Duell)
> Subject: Re: interesting find
> To: cctalk(a)classiccmp.org
> Date: Fri, 7 Feb 2003 20:42:32 +0000 (GMT)
> Reply-To: cctech(a)classiccmp.org
>
> > And when nobody cared about the size, weight and power consumption
> > of computers... ;-)
> >
> > > The HP 9100A/B calculators use a similar architecture, using
> > > wire bobbins instead of rods, for a microsequence store.
>
> The HP9100B was entirely discrete transistors [1], with normal R/W core
> memory, the core-on-a-rope microcde store and inductively coupled PCB
> tracks for the main program ROM.
>
> The HP9810 which replaced it was built from TTL chips, with 256 nybble
> PROMs for the microocde store (and the ALU, which was a couple of
> programmed PROMs), 512 byte ROMs for the main program store, and 256 bit
> DRAMs (1103s) for the R/W memory.
>
> Admittedly the 9810 had space for an internal thermal printer, and it had
> more user memory. But in the basic configuration it did less ('Math'
> functions, like SIN, COS, TAN were on a plug-in ROM module on the 9810,
> and bulit-in on the 9100). But the 9810 (the machine built with ICs) is
> larger than the 9100.
>
> [1] OK, there are 8 IC op-amps in the 9100B on the card reader PCB (read
> amplifier and comparator for the 3 data tracks and the clock track). But
> the machine will run without the card reader ;-)
>
> -tony
>
> --__--__--
>
> Message: 7
> From: ard(a)p850ug1.demon.co.uk (Tony Duell)
> Subject: Re: MicroVAX 3800 Power Cable
> To: cctalk(a)classiccmp.org
> Date: Fri, 7 Feb 2003 23:21:19 +0000 (GMT)
> Reply-To: cctech(a)classiccmp.org
>
> > On Feb 6, 22:33, Tony Duell wrote:
> >
> > > I don't see how you can do a proper test without a visual inspection
> > of
> > > the connections... And I've yet to see a moulded connector that
> > provides
> > > a proper strain-relief for the cable.
> >
> > A good PAT tester will check at a sensible current (though admittedly a
> > lot only check earth continuity at a proper current). As for strain
>
> I've never met a PAT tester that tests the current-carrying conductors at
> a significant current, mainly because there's no easy way to do this
> without dismantling the unit under test (if the cable is fixed) -- the
> maximum current you could pass would be the normal operating current of
> the unit (by simply applying mains to it), which is not enough. Even then
> you couldn't measure the voltage drop across one of the conductors.
>
> You may have guessed that I don't trust PAT testers, and I have no faith
> at all in the safety standards as usually applied. Proper safety tests on
> the other hand...
>
> > releif, well you're not supposed to swing the equipment by the power
> > cable, Tony!
>
> True, but equally I don't expect the outer covering of the cable to pull
> out of the moulded connector in normal use exposing the single-insulated
> wires inside. Which has happened to many moulded cables round here.
>
> I assume you'd fail a rewirable plug with the cord grip missing/not used
> on an electrical safety test. I certainly would. But most moulded cables
> are not a lot better than that.
>
> > > The cable mounted section looks like a normal 'cold condition'
> > _socket_,
> > > but there are 3 round pins sticking out of the face of it (where the
> > > socket holes would be). The chassis part looks like the normal plug
> > > (recessed into the panel, etc) with 3 holes in it in place of the
> > normal
> > > plug pins.
> >
> > I've a feeling I've seen this used somewhere -- but not recently, and I
> > can't think where :-(
>
> I've thought of another place I've seen them used. Leitz Focomat 1
> enlarger, at the top of the column. Connector for the lampholder assembly.
>
> -tony
>
> --__--__--
>
> Message: 8
> From: ard(a)p850ug1.demon.co.uk (Tony Duell)
> Subject: Re: Rookie HP-85 problem
> To: cctalk(a)classiccmp.org
> Date: Fri, 7 Feb 2003 23:41:27 +0000 (GMT)
> Reply-To: cctech(a)classiccmp.org
>
> > OK, I took it apart to take alook inside and clean it up. Now I can't
get
> > the damn cover back on.
> > It seems to get caught on the tape eject button. Don't want to break the
> > cover forcing it.
> >
> > Are you supposed to separate the monitor/tape brown faceplate from the
rest
> > of the cover first?
>
> No, pull off the eject button (you should do this before removing the
> cover). Then the cover fits easily. Put the button back on when the cover
> is screwed in place.
>
> -tony
>
> --__--__--
>
> Message: 9
> Date: Sat, 08 Feb 2003 00:08:16 +0000
> From: John Honniball <coredump(a)gifford.co.uk>
> Organization: Stoke Gifford Computer Museum
> To: cctalk(a)classiccmp.org
> Subject: Re: Old Computer Companies
> Reply-To: cctech(a)classiccmp.org
>
> Hans B Pufal wrote:
> >> Eliott computers from UK. What happened to them? I mean Eliott, not
N...a
>
> There are a few Elliot 803s preserved in Britain. One at Bletchley
> Park, another at the Science Museum, and probably others. They have
> an interesting power supply: the incoming mains is used to charge
> a *big* Ni-Cd battery, which powers the computer. The same battery
> is used in the Nimrod aircraft, and the RAF have kindly supplied
> spares for the 803s.
>
> --
> John Honniball
> coredump(a)gifford.co.uk
>
> --__--__--
>
> Message: 10
> Date: Fri, 07 Feb 2003 16:03:12 -0800
> To: cctalk(a)classiccmp.org
> From: Mike Ford <mikeford(a)socal.rr.com>
> Subject: Re: Assembly on a Apple IIc+
> Reply-To: cctech(a)classiccmp.org
>
> > > Get a copy of BigMac, and go ahead. it's a nice all in one
> > > environment, and works fine on every Apple.
> >
> >Oh Yeah! BigMac (or as we used to call it at Software Productions,
> >"BigHack").
>
>
> My favorite was always LISA, Laser Interactive Symbolic Assembler, a
> complete editor/asm/runtime kind of setup.
>
> I need to look around and figure what the status is of the program, but I
> have most of the versions of it that ever existed.
>
> --__--__--
>
> Message: 11
> Subject: RE: WANTED: RA7x Enclosure/Operator Ctrl. Panel
> Date: Fri, 7 Feb 2003 18:02:00 -0700
> From: "John Willis" <jwillis(a)arielusa.com>
> To: <cctalk(a)classiccmp.org>
> Reply-To: cctech(a)classiccmp.org
>
> New Mexico, USA
>
>
> -----Original Message-----
> From: Eric Dittman
> Sent: Fri 2/7/2003 4:46 PM
> To: cctalk(a)classiccmp.org
> Cc:
> Subject: Re: WANTED: RA7x Enclosure/Operator Ctrl. Panel
>
> > Wanted: RA7x Enclosure/Operator Ctrl. Panel
>
> Where are you located?
> --
> Eric Dittman
> dittman(a)dittman.net
> Check out the DEC Enthusiasts Club at http://www.dittman.net/
>
> [demime 1.01a removed an attachment of type application/ms-tnef which had
a name of winmail.dat]
>
> --__--__--
>
> Message: 12
> Date: Sat, 8 Feb 2003 01:24:44 GMT
> From: pete(a)dunnington.u-net.com
> To: cctalk(a)classiccmp.org
> Subject: Re: MicroVAX 3800 Power Cable
> Reply-To: cctech(a)classiccmp.org
>
> On Feb 7, 23:21, Tony Duell wrote:
> > > On Feb 6, 22:33, Tony Duell wrote:
> > >
> > > > I don't see how you can do a proper test without a visual
> inspection
> > > of
> > > > the connections... And I've yet to see a moulded connector that
> > > provides
> > > > a proper strain-relief for the cable.
> > >
> > > A good PAT tester will check at a sensible current (though
> admittedly a
> > > lot only check earth continuity at a proper current). As for
> strain
> >
> > I've never met a PAT tester that tests the current-carrying
> conductors at
> > a significant current, mainly because there's no easy way to do this
> > without dismantling the unit under test (if the cable is fixed) --
> the
> > maximum current you could pass would be the normal operating current
> of
> > the unit (by simply applying mains to it), which is not enough. Even
> then
> > you couldn't measure the voltage drop across one of the conductors.
>
> A proper PAT tester to current standards has a socket for each end of
> an IEC cable, and each cable is supposed to be individually tested with
> both ends plugged in to the tester.
>
> > > releif, well you're not supposed to swing the equipment by the
> power
> > > cable, Tony!
> >
> > True, but equally I don't expect the outer covering of the cable to
> pull
> > out of the moulded connector in normal use exposing the
> single-insulated
> > wires inside. Which has happened to many moulded cables round here.
>
> I've only seen one do that -- and it was an instant candidate for the
> wirecutters at both ends. A proper visual inspection is supposed to be
> the first part of the PAT.
>
> > I assume you'd fail a rewirable plug with the cord grip missing/not
> used
> > on an electrical safety test. I certainly would.
>
> Yes. The first thing I do with any multiblock is take it apart to see
> how the ends are wired -- the cheap ones are usually in a condition
> where I feel compelled to re-do the job.
>
> --
> Pete Peter Turnbull
> Network Manager
> University of York
>
> --__--__--
>
> Message: 13
> From: Kelly Leavitt <CCTalk(a)catcorner.org>
> To: "'cctalk(a)classiccmp.org '" <cctalk(a)classiccmp.org>
> Subject: RE: Looking for source of MFM or RLL drives
> Date: Fri, 7 Feb 2003 20:12:08 -0500
> Reply-To: cctech(a)classiccmp.org
>
> Yes, the OS allows entering of drive geometry. Actually only supports MFM
up
> to 70Meg. RLL drives will of course work, just not to RLL capacity. I'm
> looking for the largest drives I can find.
>
> From: Ethan Dicks
> --- Kelly Leavitt <CCTalk(a)catcorner.org> wrote:
> > Any good sources of MFM or RLL drives. This would be for a Tandy 6000
> > running Xenix.
> >
> > I'm looking for 70 Meg or higher MFM (110 RLL capacity).
>
> Hmm... those aren't so common (in the DEC world, there are two
> choices - the RD53 (Miniscribe 1325) and the RD54 (Maxtor XT2190).
>
> I take it you aren't constrained by a narrow set of expected
> geometries? (i.e. - you have a running system and/or the install
> procedure asks you about the drive rather than assuming?)
>
> -ethan
>
> --__--__--
>
> Message: 14
> Subject: RE: Disk drive head locking (DEC RA-82 and HP 7920)
> Date: Fri, 7 Feb 2003 18:37:25 -0700
> From: "John Willis" <jwillis(a)arielusa.com>
> To: <cctalk(a)classiccmp.org>
> Reply-To: cctech(a)classiccmp.org
>
> I seem to have only up to RA81, but everything else :(
> -----Original Message-----
> From: Dan Veeneman
> Sent: Fri 2/7/2003 3:04 PM
> To: cctech(a)classiccmp.org
> Cc:
> Subject: Disk drive head locking (DEC RA-82 and HP 7920)
>
> Hello,
>
> I'm scheduled to pick up a pair of DEC RA-82 drives along
> with an HP 7920 drive in the next couple of weeks.
>
> I don't have any technical documentation for either of these
> drives, but I'd be very interested in learning the proper
> procedure for locking down the heads on these drives
> prior to moving them. If anyone has the steps to take
> for either or both of these drives, please drop me a note
> or point me to the proper archive.
>
> They've already been warehoused, so it might be too late,
> but I'd like to be as safe as I can.
>
> Thanks!
>
>
> Cheers,
>
> Dan
> www.decodesystems.com/wanted.html
>
> [demime 1.01a removed an attachment of type application/ms-tnef which had
a name of winmail.dat]
>
> --__--__--
>
> Message: 15
> Subject: RE: Looking for source of MFM or RLL drives
> Date: Fri, 7 Feb 2003 18:43:20 -0700
> From: "John Willis" <jwillis(a)arielusa.com>
> To: <cctalk(a)classiccmp.org>
> Reply-To: cctech(a)classiccmp.org
>
> I have an RD54 available... no idea whether its working.
> -----Original Message-----
> From: Kelly Leavitt
> Sent: Fri 2/7/2003 6:12 PM
> To: 'cctalk(a)classiccmp.org '
> Cc:
> Subject: RE: Looking for source of MFM or RLL drives
>
> Yes, the OS allows entering of drive geometry. Actually only supports
> MFM up
> to 70Meg. RLL drives will of course work, just not to RLL capacity. I'm
> looking for the largest drives I can find.
>
> From: Ethan Dicks
> --- Kelly Leavitt <CCTalk(a)catcorner.org> wrote:
> > Any good sources of MFM or RLL drives. This would be for a Tandy 6000
> > running Xenix.
> >
> > I'm looking for 70 Meg or higher MFM (110 RLL capacity).
>
> Hmm... those aren't so common (in the DEC world, there are two
> choices - the RD53 (Miniscribe 1325) and the RD54 (Maxtor XT2190).
>
> I take it you aren't constrained by a narrow set of expected
> geometries? (i.e. - you have a running system and/or the install
> procedure asks you about the drive rather than assuming?)
>
> -ethan
>
> [demime 1.01a removed an attachment of type application/ms-tnef which had
a name of winmail.dat]
>
> --__--__--
>
> Message: 16
> Date: Fri, 07 Feb 2003 21:27:05
> To: cctalk(a)classiccmp.org
> From: Joe <rigdonj(a)cfl.rr.com>
> Subject: Re: Rookie HP-85 problem
> Reply-To: cctech(a)classiccmp.org
>
> Pull on the tape eject button. It's mounted on a stud and will pull right
off. Just push it back on to re-install it.
>
> Joe
>
> At 01:11 PM 2/7/03 -0500, you wrote:
> >OK, I took it apart to take alook inside and clean it up. Now I can't get
> >the damn cover back on.
> >It seems to get caught on the tape eject button. Don't want to break the
> >cover forcing it.
> >
> >Are you supposed to separate the monitor/tape brown faceplate from the
rest
> >of the cover first?
> >
> >HELP
> >
> >RH
>
> --__--__--
>
> Message: 17
> Date: Fri, 7 Feb 2003 20:13:09 -0800 (PST)
> From: "Fred Cisin (XenoSoft)" <cisin(a)xenosoft.com>
> To: cctalk(a)classiccmp.org
> Subject: Re: Old computers from HP, maybe? Anybody know where HP is
> collecting/storing them?
> Reply-To: cctech(a)classiccmp.org
>
> > Hewlett-Packard is hoping a little green will help make computer owners
> > recycle more of their old tech gear. The computer maker is testing a
>
> no, they are hoping that a little green will help make computer owners get
> rid of their "old" tech gear and buy more new stuff.
>
>
> > meets the charities' minimum standards. "For the most part what we get
in
> > here is pretty darn old," St. Denis said. HP's recycling program accepts
>
> . . . some of it is as much as two years old!!!!
>
>
> A while back, HP began to "recycle" toner cartridges for the purpose of
> making fewer empties available for refilling (which competes with their
> new cartridge sales).
>
>
> What do YOU think their primary motivation is??
>
>
> "Re: Old computers from HP, maybe?"
> ^^^^
> It is a ONE-WAY process, of old computers going TO HP to remove them from
> circulation.
>
>
> --
> Grumpy Ol' Fred cisin(a)xenosoft.com
>
> --__--__--
>
> Message: 18
> From: "John Allain" <allain(a)panix.com>
> To: <cctalk(a)classiccmp.org>
> Subject: Re: Old computers from HP, maybe? Anybody know where HP is
> collecting/storing them?
> Date: Fri, 7 Feb 2003 23:28:25 -0500
> Reply-To: cctech(a)classiccmp.org
>
> > A while back, HP began to "recycle" toner cartridges for the
> > purpose of making fewer empties available for refilling (which
> > competes with their new cartridge sales).
>
> New cartridge sales?? I bought one of their "New" cartridges.
> Here's what the small print says:
> "This newly manufactured product may contain parts and
> materials recovered from the HP Printing Supplies Return
> and Recycling Program."
>
> > What do YOU think their primary motivation is??
>
> Selling refills themselves, But just Calling them new.
>
> John A.
>
> --__--__--
>
> Message: 19
> Date: Fri, 07 Feb 2003 23:59:51 -0500
> From: "Jerome H. Fine" <jhfinepw4z(a)compsys.to>
> Organization: Just Sufficient
> To: cctalk(a)classiccmp.org
> Subject: Re: Looking for source of MFM or RLL drives
> Reply-To: cctech(a)classiccmp.org
>
> >Kelly Leavitt wrote:
>
> > > I'm looking for 70 Meg or higher MFM (110 RLL capacity).
> > Hmm... those aren't so common (in the DEC world, there are two
> > choices - the RD53 (Miniscribe 1325) and the RD54 (Maxtor XT2190).
>
> Jerome Fine replies:
>
> By the way, the RD53 is a Micropolis 1325 or 1335 with the
> R7 jumper added to the logic board. Otherwise, the DEC
> RQDX2 will not recognize the drive. I have never tried them
> on the RQDX3 without the R7 jumper, but it might be possible -
> probably NOT.
>
> And while there may still be rare occasions when you can actually
> complete the FORMAT required for an RD53, I would recommend
> that they be used ONLY for scratch at this point at the end of their
> life cycle. I suppose that there might still be the odd RD53 that is
> still living a good life, but most (almost all) have become so unreliable
> that I strongly recommend NOT using them for any files you care to
> see the next time you turn the computer on.
>
> Sincerely yours,
>
> Jerome Fine
> --
> If you attempted to send a reply and the original e-mail
> address has been discontinued due a high volume of junk
> e-mail, then the semi-permanent e-mail address can be
> obtained by replacing the four characters preceding the
> 'at' with the four digits of the current year.
>
> --__--__--
>
> Message: 20
> Date: 8 Feb 2003 00:57:58 -0500
> Date: Sat, 8 Feb 2003 00:57:58 -0500
> From: "R. D. Davis" <rdd(a)rddavis.org>
> To: cctalk(a)classiccmp.org
> Subject: Re: Old computers from HP, maybe? Anybody know where HP is
> collecting/storing them?
> Organization: why?
> Reply-To: cctech(a)classiccmp.org
>
> Quothe Fred Cisin (XenoSoft), from writings of Fri, Feb 07, 2003 at
08:13:09PM -0800:
> > > Hewlett-Packard is hoping a little green will help make computer
owners
> > > recycle more of their old tech gear. The computer maker is testing a
> >
> > no, they are hoping that a little green will help make computer owners
get
> > rid of their "old" tech gear and buy more new stuff.
>
> Wasn't HP the company that was saving and preserving the "vintage"
> computer equipment turned back in to them? I think I read something
> about this on their web site, or somewhere, about a year or two ago.
> That's not to say they weren't scrapping newer equipment, however, and
> I don't recall reading how old the equipment had to be to qualify for
> preservation.
>
> > What do YOU think their primary motivation is??
> >
> >
> > "Re: Old computers from HP, maybe?"
> > ^^^^
> > It is a ONE-WAY process, of old computers going TO HP to remove them
from
> > circulation.
>
> Yep... even the vintage ones if they still save them from being
> scrapped; surely they still get sent off to a warehouse somewhere to
> keep them out of circulation. Speaking of circulation, an HP-3000
> Series III computer running MPE-IV was used to process data for the
> circulation department of the Baltimore Sun back around 1990... it was
> quite a contrast to see that, and it's disk farm, right across the
> room from a sea of big blue cabinets for an IBM mainframe system.
>
> --
> Copyright (C) 2002 R. D. Davis The difference between humans & other
animals:
> All Rights Reserved an unnatural belief that we're above Nature
&
> rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify
such
> http://www.rddavis.org beliefs and to justify much human cruelty.
>
> --__--__--
>
> Message: 21
> From: "Lawrence Walker" <lgwalker(a)mts.net>
> To: "Jeffrey S. Worley" <Technoid(a)30below.com>, cctalk(a)classiccmp.org
> Date: Fri, 7 Feb 2003 23:27:36 -0600
> Subject: RE: Atari ST Help
> Reply-To: cctech(a)classiccmp.org
>
> Hmmm how did my address get into this ?
> As the old flame went "check your attributes"
> and in this case your deletions.
>
> Lawrence
>
> On 7 Feb 2003, , Jeffrey S. Worley wrote:
>
> > BTW, the Link II's they are selling are NEW. Call and ask or
> > leave an email. I just checked their catalog. The link I
> > bough was from them IIRC. It came in it's original packaging
> > and was perfect in all respects. Still is perfect though now
> > used... ;-)
> >
> > Regards,
> >
> > Jeff
> >
> > > Yes, I know about that site, but they want WAY too
> > > much money for a used adapter for an old computer.
> > >
> > > You would think that at this point, they'd be...
> >
> >
> >
> > lgwalker@ mts.net
>
>
> lgwalker@ mts.net
>
> --__--__--
>
> Message: 22
> From: "George R. Gonzalez" <grg(a)umn.edu>
> To: <classiccmp(a)classiccmp.org>
> Subject: TTY ASR-33 Platen?
> Date: Fri, 7 Feb 2003 07:59:24 -0800
> Organization: Hearing Research Lab
> Reply-To: cctech(a)classiccmp.org
>
> I have been blessed with *two* Teletype ASR-33's. Apart from a minor
> cleaning, they are going to be just fine. EXCEPT the rubber platens are
as
> hard as Chinese arithmetic! In case you havent experienced this, if the
> platen gets hard, the printer doesnt print well-- the typehead kinda
bounces
> off the paper and doesnt leave a clean dark mark.
>
> I've tried the usual remedies-- acetone cleans them up, but they're still
> rock hard.
>
> I need some suggestions! Should I try ArmorAll (known to soften rubber,
> given time), "Platen cleaner", "belt dressing", "french dressing", or
what?
>
> Note that I don't need to clean or make it "grippier", it needs to be
> softened, a lot.
>
> Regards,
>
>
> George
>
> --__--__--
>
> Message: 23
> From: "Jim Keohane" <jimkeo(a)multi-platforms.com>
> To: <cctalk(a)classiccmp.org>
> Subject: Re: Assembly on a Apple IIc+
> Date: Sat, 8 Feb 2003 11:06:13 -0500
> Organization: Multi-Platforms, Inc.
> Reply-To: cctech(a)classiccmp.org
>
> Sellam Ismail,
>
> I'm either being imprecise or various readings I have done were
> imprecise. The reference to "one cycle" instruction may have been
referring
> to there being 2 cpu cycles per clock cycle. Also, there's the
"pipelining"
> some say the 6502 does when the last (or only) byte of an instruction is
> acted upon simultaneous to next instruction's 1st byte (opcode) being
> fetched
>
> So perhaps "one instruction per clock cycle" may be awfully close with
> pipelining and with use of zero page.
>
> Of course, we're talking Apple ]['s which, if I can trust my memory,
> steal every other clock cycle to refresh memory.
>
> Cheers, - Jim
>
> Jim Keohane, Multi-Platforms, Inc.
>
> "It's not whether you win or lose. It's whether you win!"
> ----- Original Message -----
> From: "Sellam Ismail" <foo(a)siconic.com>
> To: <cctalk(a)classiccmp.org>
> Sent: Friday, February 07, 2003 18:40
> Subject: Re: Assembly on a Apple IIc+
>
>
> > On Fri, 7 Feb 2003, Jim Keohane wrote:
> >
> > > p.s. I also did quite well with 6502 asm code in cpu speed tests vs
> > > 80x86 and Z80 programmers. The zero page, for all intents and
purposes,
> > > is 256 registers. 6502 is single cycle instruction execution. Look up
> > > definitions of RISC and the 6502 is arguably RISC-like.
> >
> > No 6502 instruction takes less than 2 cycles to complete.
> >
> > Sellam Ismail Vintage Computer
> Festival
>
> --------------------------------------------------------------------------
> ----
> > International Man of Intrigue and Danger
> http://www.vintage.org
> >
> > * Old computing resources for business and academia at
> www.VintageTech.com *
>
> --__--__--
>
> Message: 24
> From: "Jim Keohane" <jimkeo(a)multi-platforms.com>
> To: <cctech(a)classiccmp.org>
> Subject: Re: Assembly on a Apple IIc+
> Date: Sat, 8 Feb 2003 11:13:14 -0500
> Organization: Multi-Platforms, Inc.
> Reply-To: cctech(a)classiccmp.org
>
> Not sure if this was mentioned as another option:
>
> There's the MERLIN assembler. Versions for ProDos and DOS 3.3.
>
> - Jim
>
> Jim Keohane, Multi-Platforms, Inc.
>
> "It's not whether you win or lose. It's whether you win!"
> ----- Original Message -----
> From: "Ron Hudson" <rhudson(a)cnonline.net>
> To: <cctalk(a)classiccmp.org>
> Sent: Friday, February 07, 2003 00:19
> Subject: Assembly on a Apple IIc+
>
>
> > What do I need to get started with 6502 Assembly on an apple II?
>
> --__--__--
>
> Message: 25
> From: "lgomez" <lgomez(a)cdromsa.es>
> Subject: Re: Grundy Newbrain fix
> To: cctech(a)classiccmp.org
> Date: Sat, 08 Feb 2003 17:31:42 +0100
> Reply-To: cctech(a)classiccmp.org
>
> Please, can you say me how can i solve this problem? I've a
> Newbrain AD with the same problem.
>
> Regards
>
> On Fri, 07 Feb 2003 17:43:50 +0100
> Torben Ring <toring(a)inet.uni2.dk> wrote:
> > Hi,
> >
> > I have a Grundy Newbrain, which wouldn't start, or if it
> > started it would only show random chars in the display.
> > I've found out what was wrong with the machine and if
> > anyone needs help with fixing his (or hers) machine, I'll
> > be able to point to the problem. As far as I can tell,
> > this is a common problem with all these machines, and it
> > only gets worse as time goes by.
> >
> > Regards,
> >
> > Torben Ring
>
> --__--__--
>
> Message: 26
> Date: Sat, 08 Feb 2003 11:28:06 -0600
> From: James Rice <jrice54(a)charter.net>
> To: cctalk(a)classiccmp.org
> Subject: OT Need parts
> Reply-To: cctech(a)classiccmp.org
>
> I need one of the beige plastic headed screws that secure the side cover
> on a Dell Dimension case. The is for my UMAX S900 that shares a
> PaloAlto Design case with the earlier Dell Dimensions. I also need two
> blank drive filler panels for a HP NetServer LC II.
>
> James
> --
> http://webpages.charter.net/jrice54/classiccomp2.html
>
>
>
> End of cctech Digest
