9 Feb
2003
9 Feb
'03
2:35 p.m.
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:
Festival
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
--------------------------------------------------------------------------
----
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?
--------------------------------------------------------------------------
----
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:
Festival
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
--------------------------------------------------------------------------
----
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
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
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'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...
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 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 :-( > 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
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
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
a name of
winmail.dat]
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"). 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
--__--__--
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:
pull
up
> 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 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 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:
a name of
winmail.dat]
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
--__--__--
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:
a name of
winmail.dat]
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
--__--__--
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
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). > > 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 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 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>om>, 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:
as
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
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 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 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