3 May
2000
3 May
'00
4:45 a.m.
I have some IBM PC's to be disposed of, and I was planning to try and grab
a few of the full height floppy drives before they go to the campus
recycling center. Does anyone have a need for something from a PC, and
I do mean PC, the model before XT's.. Or does someone want to trade
something for a full height floppy drive. If so, let me know and I'll
see what I can do. Small things that might look interesting in a display
case would certainly interest me...
There are monitors as well, but if any work they probably have a lot of
screen burn, and arent worth saving. There is also one AT, but I doubt
anyone would offer enough to make me attempt to acquire it and ship it.
This stuff is at the University of Minnesota, Minneapolis.
-Lawrence LeMay
3 May
3 May
5:54 a.m.
I have been trying to get a couple of original PC cases and full-height
drives for a while now. I have 2 low SN motherboards fully cleaned,
recovered and operational with a whopping 256K RAM (!) on the motherboard. I
would love to get a couple of cases, drives and any original IBM boards that
may be in there.
Cheers,
Frederic
mailto: charp(a)bitflash.com
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Lawrence LeMay
Sent: Wednesday, May 03, 2000 12:46 PM
To: classiccmp(a)classiccmp.org
Subject: IBM PC parts
I have some IBM PC's to be disposed of, and I was planning to try and grab
a few of the full height floppy drives before they go to the campus
recycling center. Does anyone have a need for something from a PC, and
I do mean PC, the model before XT's.. Or does someone want to trade
something for a full height floppy drive. If so, let me know and I'll
see what I can do. Small things that might look interesting in a display
case would certainly interest me...
There are monitors as well, but if any work they probably have a lot of
screen burn, and arent worth saving. There is also one AT, but I doubt
anyone would offer enough to make me attempt to acquire it and ship it.
This stuff is at the University of Minnesota, Minneapolis.
-Lawrence LeMay
6:01 a.m.
I have some IBM PC's to be disposed of, and I was
planning to try and grab
a few of the full height floppy drives before they go to the campus
recycling center. Does anyone have a need for something from a PC, and
I do mean PC, the model before XT's.. Or does someone want to trade
something for a full height floppy drive. If so, let me know and I'll
My rule is to pull anything that looks different or interesting. Obviously
a 16-256k logic board is worth preserving, but so are any special looking
cables.
Anything special about the full height drives?
7:14 a.m.
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9:20 a.m.
Not to mention the original ROM based BASIC that is in early IBM PCs and is
allowed for in later models and clones even though it was rarely installed.
(there was no "clean room" BASIC done AFAIK)
--Chuck
9:29 a.m.
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9:46 p.m.
My rule is to
pull anything that looks different or interesting. Obviously
a 16-256k logic board is worth preserving, but so are any special looking
^^^^^^^
Presumably you mean a 16-64K logic board here. That was the first IBM PC
motherboard and is thus historically interesting. The later 64-256K board
is a lot more common, though :-( 
4 May
4 May
6:55 a.m.
Mike Ford <mikeford(a)socal.rr.com> asks:
Was it really "later", or was the 64-256k an
option available at the same
time as the 16-64k?
It was really later. At FCS, 64K was the maximum supported on the planar.
IBM offered 64K expansion cards.
The PC required DIP switches on the planar to be set to indicate to the
BIOS the total amount of installed memory (both on the planar and
expansion cards). The maximum supported by the switch settings was well
under 640K. IBM-DOS believed the memory limit set by the BIOS, so if
you had more than the BIOS could understand, you had to use a batch
script with DEBUG, a TSR or other similar hack to make the machine
believe that it had more memory.
8:01 a.m.
On Thu, May 04, 2000 at 02:46:14AM -0700, Mike Ford wrote:
Was it really "later", or was the 64-256k an
option available at the same
time as the 16-64k?
I'm 99% sure it was "later". I bought my 5150 new in 1983, and there was
no
choice in mobo, I got the minimum config of 64 KB and one 160/180 KB disk.
I'm glad that the mobo could take more because I had to immediately upgrade
the machine to 128 KB, MASM 1.00 was claimed to run in 64 KB but evidently
that was under PC-DOS 1.x. I splurged and spent the extra $20 for PC-DOS 2.0
and at ~21 KB it was so bloated that MASM wouldn't fit! And even once it was
working, it couldn't take pathnames in filenames (very annoying for INCLUDE)
since it still lived in FCB world.
Still have the machine, but I swapped in a V20 CPU at the earliest opportunity
(and lost the 8088 many moves ago) so I suppose I ruined any "classic"
value it would ever have. Awwww... I also fried the MDA in the course of
some modifications (#1 was to double the memory so it could display 50 lines
of text with interleave, no flicker at all with that soupy IBM monitor, #2
was to add color support and change the base I/O and mem addresses, screwed
something up there), but I like the HGC+ better anyway.
John Wilson
D Bit
3 May
3 May
7:28 a.m.
On Wed, May 03, 2000 at 11:01:38AM -0700, Mike Ford wrote:
Anything special about the full height drives?
Nope, they're regular Tandon TM100-1 or TM100-2 drives. On *some* drives,
IBM had custom face plates made with the IBM logo in one corner, but they
were still the nice Tandon drives.
Eli Heffron's used to have the TM100-2 drives for $5/ea in great shape,
with or without the IBM logo, no idea if that's still true (this was a
while ago). Sure beats the days when an SA400L was over $100!
John Wilson
D Bit
6:51 a.m.
On Wed, May 03, 2000 at 11:01:38AM -0700, Mike Ford wrote:
Anything special about the full height drives?
Nope, they're regular Tandon TM100-1 or TM100-2 drives. On *some* drives,
IBM had custom face plates made with the IBM logo in one corner, but they
were still the nice Tandon drives.
Eli Heffron's used to have the TM100-2 drives for $5/ea in great shape,
with or without the IBM logo, no idea if that's still true (this was a
while ago). Sure beats the days when an SA400L was over $100!
John Wilson
D Bit
9:13 a.m.
On Wed, May 03, 2000 at 11:01:38AM -0700, Mike Ford
wrote:
Well, the main reasons I wanted to grab some, were so I would have some
for a display someday (sort of a history of floppy drives), plus
I figured if people had genuine IBM XT's in their collections, it
would be likely that someone had upgraded to a half height floppy
in order to gain an additional drive bay. Such a person might want
to restore their unit to original condition while they still have
an opportunity to do so.
Might be useful in other machines, possibly TRS-80 model 3 and 4
used full height tandon drives?
-Lawrence LeMay
Anything special about the full height drives?
9:34 a.m.
Well, the main reasons I wanted to grab some, were so
I would have some
for a display someday (sort of a history of floppy drives), plus
I figured if people had genuine IBM XT's in their collections, it
would be likely that someone had upgraded to a half height floppy
in order to gain an additional drive bay. Such a person might want
to restore their unit to original condition while they still have
an opportunity to do so.
Might be useful in other machines, possibly TRS-80 model 3 and 4
used full height tandon drives?
NorthStar Horizons!
11:58 a.m.
NorthStar
Horizons!
So if someone was to bid on that Northstar Horizon thats on Ebay, but that
doesnt have any floppy drives... 
8:49 a.m.
Lawrence LeMay wrote:
I have some IBM PC's to be disposed of, and I was planning to try and grab
a few of the full height floppy drives before they go to the campus
recycling center. Does anyone have a need for something from a PC, and
I do mean PC, the model before XT's.. Or does someone want to trade
You might take a look at the motherboards and see which PC motherboard is in
them. The early ones, 16k - 64K, are probably getting much harder to find
these days. I have a couple but it has been quite a few years since I've
seen others.
9003
days inactive
9004
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16 comments
10 participants
participants (10)
-
ard＠p850ug1.demon.co.uk -
bill＠chipware.com -
charp＠bitflash.com -
cmcmanis＠mcmanis.com -
eric＠brouhaha.com -
kdavis＠bender.ndx.net -
lemay＠cs.umn.edu -
marvin＠rain.org -
mikeford＠socal.rr.com -
wilson＠dbit.dbit.com