simpler...
buy a threecell pack intented for cordless phones.
Ratshack sells them and there are various form factors
but they work. FYI don't worry the capacity, anything will
do even three AA nicads (500mah) in a battery box(holder).
Allison
------Original Message------
From: Paul Thompson <thompson(a)mail.athenet.net>
To: classiccmp(a)classiccmp.org
Sent: May 16, 2001 1:20:42 PM GMT
Subject: Re: Console bulkhead battery source
Good idea.
With other battery packs I tried to use off the shelf batteries to make a
new pack but had very poor luck in getting the solder to stick to the
battery. It seemed like a spot weld was used to attach the wire rather
than normal solder.
I assume that your idea uses the existing leads in the battery pack to get
around this problem.
On Tue, 15 May 2001, Don Maslin wrote:
> Get the four cell package, use your razor knife to remove the fourth
> battery, resolder the lead from the fourth to the third cell and
> install.
--
> > These assholes even claim that:
> >
> > "TeleDisk was developed to assist the U. S. Treasury Department
> > in the processing of computer evidence tied to floppy diskettes."
> >
> > Does anybody know if this is *true*?! I always thought it was
> > developed to distribute software via BBS's (and other electonic
> > means).
>
> I believe it to be 100% false. The story I remember (probably read in
> some Sydex documentation) is that Teledisk was written to help support
> the CP/M disk reading software (was that called 22disk?). The idea was
> that if you had a CP/M disk in a format that wasn't supported by 22disk,
> you could use Teledisk to mail an image of the disk to Sydex so they
> could attempt to add the format to later versions.
>
> In any case, teledisk is not that useful for extracting information from
> a non-PC disk (which is presumably what the police, etc, would want to
> do). I can really see the point of being able to make a copy of a disk
> for some machine they don't have. Some program like anadisk, which lets
> you read sector-by-sector, make disk images, and so on, would be a lot
> more useful to them I would have thought.
>
> -tony
>
Someplace among my 5.25 disks I have a zipped early shareware copy of Teledisk
that I downloaded from a BBS around 92-93. I remember it had some sort of lame
disclaimer to the effect that it was not to be used to circumvent copyright restrictions.
I thought at that time it was just a legal cover for their asses and certainly looked
like a way around copy-protection.
larry
Reply to:
lgwalker(a)look.ca
I need help identifying the function (ie what is it!) of a MOSTEK chip,
part number MK2488P with date code (?) 7429. If it's 1974, its a little
early for my data books.
Thanks Norm
A friend is moving from the Midwest to the West coast,
so he's liberating himself of all his antique computers
except for his IMSAI.
This means the rest goes... this includes two Kaypros,
a TRS-80 Model I w/Expansion Interface, an Apple ///,
and maybe a TRS-80 Color Computer, plus various other stuff.
No charge if you say "John Foust told me about it." :-)
They're having a rummage sale starting tomorrow.
Anything left goes on the curb.
Questions to Mike and Becky Winter <mwinter(a)execpc.com>.
(Battlebot freaks may recognize his name.) Location
is http://www.switchboard.com/bin/cginbr.dll?ID=101809742&MEM=1&FUNC=MORE&TYPE…
- John
I'm wondering who collects SS-50 bus stuff. I'm interested in who has
systems
like Smoke Signal Broadcasting (Chieftain), Helix, Gimix, Midwest
Science
Instruments (MSI).
Thanks,
Eric
For those interested in the SWTPc and SS-50 bus machines:
>Status: RO
>Sender: fufu-l(a)telia.com
>Reply-To: fufu-l(a)telia.com
>Date: Mon, 14 May 2001 08:47:25 -0700
>From: "Michael Holley" <holley(a)mail.hyperlynx.com>
>To: Multiple recipients of fufu-l <fufu-l(a)telia.com>
>Subject: Completed Floppy Disk Controller Design
>
>I have finished the design of a new floppy disk controller for the S30 I/O
>bus. The card emulates the SWTPC DC-4 with a few additions. The design uses
>a Western Digital WD2797 FDC that supports double density format. The WD2797
>is a superset of the WD1797 and WD1691 and is software compatible.
>
>The card will fit in an old 6800-style case or the newer 6809-style case
>with the connectors coming out the back. The clock frequency is programmable
>so the card should work with 3.5-inch drives.
>
>The design is complete but needs to be reviewed.(There are errors and
>omissions.) After a few weeks of review I will have 2 (or 4) boards made. I
>am looking for someone who has a system with SS30 I/O bus to help debug the
>board. After the design is tested I will order 10 or so boards with
>silk-screen and solder mask.
>
>The design documents can be found at:
>http://members.aol.com/swtpc6800/FDC2/FDC_Index.htm
>I still have some design documents in process and will add them when they
>are done.
>
>The difficulty I was having with a discrete logic design was board layout. I
>was going to use some 20-pin programmable logic devices such as the 16V8 but
>programming them is difficult. (I have an old Data I/O Model 29 programmer
>but I haven't turned it on in 10 years.) I was looking for an in-circuit
>programmable device.
>
>I decided to use the Xilinx XC9500 CPLD family. They are low cost ($6), the
>development software is free, and the programming hardware is simple.
>Another reason is that I have worked with these devices since they were
>developed by Plus Logic in the late 1980s. Somewhere I have a Plus Logic
>2020 engineering sample. The development software is based on the ABEL and
>Synario software that I developed at Data I/O.
>
>I chose the XC9572, which has 72 Macrocells and comes in an 84-pin PLCC
>package. This device holds all of the discrete logic devices needed in the
>design. The timer IC and one-shot IC are external along with the buffers. I
>could have connected the disk drive directly to the CPLD but I felt the low
>cost buffers would be easier to replace in the future. The device is
>re-programmable so design changes are easy. I am only using about half of
>the device now.
>
>For the PCB layout I went with ExpressPCB because they have free software
>and they do low cost double-sided boards. A friend of mine has had good luck
>with them. I have access to very high-end PCB layout software at work but I
>want the design to be public domain. (If I published the design files in
>PADS format you would have to buy a $10,000 PADS PowerPCB software package
>to modify them.)
>
>After the layout is done I will publish the PBC file. If someone wants to
>review the current design I can email you the file.
>
>The only rare part in the design is the WD2797; I bought 10 of them from BG
>Micro before I started the design. The rest of the parts are available from
>Digi-Key with exception of a few ICs that I found at Jameco. The complete
>kit of parts cost $50 plus about $40 for the circuit board. I am going to
>acquire enough parts to build 10 boards.
>
>I still need to write the calibration procedure and add the required test
>point to the board. I just noticed a trace clearance problem near pin one of
>the 34-pin connectors.
>
>The DDEN line is controlled by the CPLD so we can add the logic for MS-DOS
>floppies. This logic in not in the CPLD yet.
>-----------------------------------------------
>Michael Holley holley(a)hyperlynx.com
>Innoveda
>Phone: (425) 869-2320 Fax: (425) 881-1008
>Direct Line (425) 497-5075
>-----------------------------------------------
>--
>FLEX & UniFLEX Users' mailing List
>http://www.flexusergroup.com/
>http://w1.503.telia.com/~u50302970/
>
>
--
Collector of Classic Microcomputers and Video Game Systems:
Home of the TRS-80 Model 2000 FAQ File
http://www.geocities.com/siliconvalley/lakes/6757
Dear Dwight,
I have just obtained a C4004 and its supporting chips and am very interested in learning how to write some code for it. I read from http://www.classiccmp.org/mail-archive/classiccmp/1999-02/0689.html that you have made some tools to do this. I am an EET student so I don't have a whole lot of experience in programming. I have written machine code for the Motorola 6800 series but that's about it. I am VERY interested in learning more about it though. If I can pull it off I would like to do this as a final project for school. My main problems are actually writing and compiling code and coming up with the two phase clock that this chip requires. If you can help me at all it would be GREATLY appreciated! I am willing to pay for your software as I am sure it took a lot of hard work to create it.
Thanks,
Josh
OK, well so far none of those solutions seem likely to help me... The
computer in question has a unique odor, not mouse/mold/cigarette/anything
else mentioned before generated, nor is it one I recognize, and I've driven
it down the road in the back of a pickup mostly disassembled at speeds in
excess of 45MPH... And it still FREAKING REEKS! I'm not making a joke, but
my Wang really smells... And its a funky smell, sometimes not present, and
other times you can smell it even with the front door shut... I'd really
like to eradicate the odor, though much joke potential will be lost...
Suggestions?
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