Doug Spence, please e-mail me so I have your current e-mail address. I
tried e-mailing you the images of the Apple3 system disks and it bounced.
If anyone else wants ShrinkIt archives of the Apple /// system disks let
me know and I'll e-mail them off to you. You'll need an Apple that can
run ShrinkIt (//e, //c, //gs, ???) and a copy of ShrinkIt (can be found
on the net, public domain AFAIK) to transfer them to 5.25" floppies.
Sam
-------------------------------------------------------------------------------
Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass
<> I knew about that too, Those disks is too far expensive for few fixes
<> run to pay off in due time. :)
<
<It's not that bad. You only need 4 disks total - one of each size. They're
<no more expensive than the other test gear you really should have.
<
<If somebody could find a UK source of 8" alignment disks then I'd buy one
<_now!_
Dec diagnostic disks that havent been rewritten are generally very close to
nominal alignment.
<I was planning on removing the pin altogether and letting the head
<carriage move freely over the leadscrew. Then fit a micrometer head and a
<spring to pull the head assy agains the end of the micrometer. I should be
<able to get about 1" of calibrated head movement.
While you can do this there is one problem. Alignment disks are recorded
with a narrower than normal trackwdith and also stagger tracks (recorded
with offset either side of true) for alignment use.
Another tool you need is a source of 125/250/500khz pulses that conform to
FM timing (single density) for writing patterns. This is something you can
build out a handful of counters and a 4mhz clock osc.
Over the years I've found that if the drive needs alignment it's wise to
look for other problems like spindle and motor bearings that are tired
or head to actuator wear that will make for sloppy operation. Head
alignment can signal other problems. I retired a SA800 for spindle
bearings because the thing would not reliably read (had a new in the box
spare). Generally I've found that it's best to put aside those drives in
favor of a better one stealing the logic from it as needed. The only time I
would fix it is when there is really no other choice. Unless doing a museum
style restore I've found some drives are better dumped (sa400s in general)
in favor of other better drives of the era.
Allison
> I can get lots of TI 99 items, tell what you are looking for ??
Thanks, John. I am looking for:
Cartridges (I have none), preferably not of arcade-style games unless
particularly significant
Manuals, in particular pinout and levels of video port so that I can
connect a monitor of some description...
Also, details of what sort of joystick I need to connect...
Philip.
Message text written by INTERNET:classiccmp@u.washington.edu
>A TI-99/4A (works) with RF Modulator, Joysticks, and 20 cartridges... $5.<
Were you soliciting information on the TI?
The joysticks aren't Atari-standard, so you're lucky those were in the
package. Cartridge-wise, look through your haul particularly for Extended
BASIC, Disk Manager II and Terminal Emulator II. The first is critical if
you even get an Peripheral Expansion Box ("PEB"); the second is helpful if
you get a PEB. The third is useful if you ever get the voice synthesizer
(or of course, if you want to try a modem). If you have an Adventure
cartridge, it won't do you much good unless you also got the accompanying
tape.
>Tho this isn't perfectly legit, I also picked up a Sony AC/DC (with 3
types
of DC!) 5" color TV, which I plan to use as a monitor / portable monitor
for one (or more) of my CoCo's. (The TI didn't like it... :-( <
No clue on why . . . .
>Question: One of the cartridges has a triangular picture-hanger rivited to
the case... would this be some sort of store demo or something?<
No way of telling, short of inserting it and seeing what pops up.
Gil Parrish
107765.1161(a)compuserve.com
Isaac Davis <indavis(a)juno.com> wrote:
> On the discussion of classic computers, does anyone have some Analog
> magazines from the 86-87 time frame. I am trying to follow some of the
> 'Boot Camp' articles (machine language tutorial). The problem that I
> have is, they all build off of a beginning article, and you'll never
> guess what I am missing. They are articles on player missile graphics in
> machine language. If anyone has them, I would really appreciate getting
> in contact with them. I believe what I am looking for is in the
> July-October issues. I have November 86 - January 87, which are the last
> 3 in the series.
Time for a show of hands: how many of us are going to LoneStarCon in
San Antonio over Labor Day weekend?
Isaac, if you haven't found these by say 27 August, please let us know
so we know to be looking for them in the huckster room....
-Frank McConnell
If you e-mail me a fax number I can fax you the pages, there are 44 pages in
the manual showing the many different settings.
At 05:54 PM 8/18/97 -0700, you wrote:
>Can anyone help this guy out?
>
>---------- Forwarded message ----------
>Date: Sun, 27 Jul 1997 20:28:19 -0500
>From: Jim Duchek <jimduchek(a)primary.net>
>To: bill(a)booster.bothell.washington.edu
>Subject: Computers
>
>Hi there. I noticed in your collection that you had an IBM PC; I'm
>assuming it's a 5150. Do you have a manual for it that might list the
>jumper and dip switch settings on the motherboard, and if so, could you
>tell me what they are? Thanks.
>
>
>Jim Duchek
>jimduchek(a)primary.net
>
>
>
Can anyone help this guy out?
---------- Forwarded message ----------
Date: Sun, 27 Jul 1997 20:28:19 -0500
From: Jim Duchek <jimduchek(a)primary.net>
To: bill(a)booster.bothell.washington.edu
Subject: Computers
Hi there. I noticed in your collection that you had an IBM PC; I'm
assuming it's a 5150. Do you have a manual for it that might list the
jumper and dip switch settings on the motherboard, and if so, could you
tell me what they are? Thanks.
Jim Duchek
jimduchek(a)primary.net
I can get lots of TI 99 items, tell what you are looking for ??
At 10:28 AM 8/18/97 BST, you wrote:
>> > I bought: A TI-99/4A (Not as lucky as Roger M - I paid L12 with no
>> > joysticks, manuals or cartridges, but I did get the UHF thingy)
>>
>> Nice!!!....
>
>Yes, my first TI computer (I have a broken calculator and a Silent 700
>or two...)
>
>> > But the real find: A British Telecom Microscribe for L1
>>
>> Very nice...
>>
>> > This object is a solidly built sub-notebook (about 7 in square by 1
>> > thick) with a dinky keyboard and a palmtop-sized LCD. It has 32K of RAM
>> > and 16K of ROM, and the processor is an Hitachi HD63A03XP single chip
>> > microcomputer.
>>
>> Is that the only processor? It sounds as though it might be distantly
>> related to a Thorn-EMI machine called a Liberator which had a 63-something
>> for I/O and a Z80 running a CP/M like OS (or at least, that what I think
>> is inside it - the ROM is (C) Digital Research, and running strings on a
>> ROM image turns up some interesting stuff)
>
>'fraid so. Indeed, it is the only chip with >28 pins (apart from the
>flatpacks on the back of the LCD). IC master, just to be perverse,
>gives various 6301 and 6305 variants in that series, but nothing of 6303
>flavour.
>
>> Not so. A lot of machines use the NiCd as the smoothing component. HP
>> certainly did in just about all of their more recent NiCd calculators (the
>> ones that use the 8V 50mA AC charger).
>
>Interesting. I haven't found where the battery gets in, but the input
>stage is something like:
>
> Diode
>Ring --+--/\/\/-|>|-+-----+
> | 56R | \
> | |C / 82R
> | |/ \
> +-/\/\/-+--| NPN /
> | |\ |
> _ |E |
>Tip--+ Zener A +-----+--- +5V? to rest of machine (??)
> | |
> GND GND
>
>I would guess the battery could well do any smoothing downstream of the
>regulator, but I'd still like to see some upstream of it!
>
>If the machine draws 60mA, minimum voltage at input is around 9V,
>maximum around 13V, so I suppose I could try 10V and see what happens...
>
>> Some, like the Epson HX20 even used the fact that the voltage across the
>> NiCd would go above 5V to limit the supply voltage to the chips. The
> ^^^^^
>I take it you mean wouldn't
>
>> If you have an adjustable PSU, apply about 5V, and then crank it up
>> towards 9V (I'd guess that's what it takes), monitor the 5V line and stop
>> if it rises above (say) 5.5V. See what current flows - it should be
>> arround 50mA.
>
>Worth a try.
>
>Philip.
>
>
>
