5 Apr
1999
5 Apr
'99
6:54 p.m.
O.K. I think I have it figured out. I'll have to either get a cable for
the external drives (or make one). I was thinking that the 4869 was the
drive that would be used with the 5170, but it isn't. Was there a drive box
available from IBM for the 5150 (or was that the expansion chassis)?
ThAnX,
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
-----Original Message-----
From: Joe <rigdonj(a)intellistar.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, April 05, 1999 1:33 PM
Subject: Re: IBM 5150 PC disk drive questions
Jason,
The external cable had two connectors and a twist in it just like the
internal one.
Joe
At 01:29 PM 4/5/99 -0400, you wrote:
>According to the jumper settings on the 5150, it appears that 4 floppy
>drives can be connected to the computer. How is this possible? I'm
>guessing 2 internal, and two external, but there's only one connector for
an
external drive,
so it would only allow 3 drives.
Or is there a special controller that has dual external ports?
Any suggestions?
ThAnX,
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
5 Apr
5 Apr
4:14 p.m.
O.K. I think I have it figured out. I'll have to
either get a cable for
the external drives (or make one). I was thinking that the 4869 was the
drive that would be used with the 5170, but it isn't. Was there a drive box
available from IBM for the 5150 (or was that the expansion chassis)?
ThAnX,
Use one of your TRS-80 external drive boxes.
But open it up and set the drive select to "B:", since the TRS-80 expected
drive select to be handled by the cable.
5:40 p.m.
Jason,
No, the expansion chassis was an XT size box with nothing but a MB with
of card slots and a power supply. It connected to the main PC by a cable
and a card that plugged into a card slot.
I've never seen a PC type (non PS-2) type external drive from IBM but
they were probably available.
Joe
At 04:54 PM 4/5/99 -0700, you wrote:
O.K. I think I have it figured out. I'll have to
either get a cable for
the external drives (or make one). I was thinking that the 4869 was the
drive that would be used with the 5170, but it isn't. Was there a drive box
available from IBM for the 5150 (or was that the expansion chassis)?
ThAnX,
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
-----Original Message-----
From: Joe <rigdonj(a)intellistar.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, April 05, 1999 1:33 PM
Subject: Re: IBM 5150 PC disk drive questions
Jason,
The external cable had two connectors and a twist in it just like the
internal one.
Joe
At 01:29 PM 4/5/99 -0400, you wrote:
>According to the jumper settings on the 5150, it appears that 4 floppy
>drives can be connected to the computer. How is this possible? I'm
>guessing 2 internal, and two external, but there's only one connector for
an
external
drive, so it would only allow 3 drives.
Or is there a special controller that has dual external ports?
Any suggestions?
ThAnX,
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
4:49 p.m.
I've never seen a PC type (non PS-2) type
external drive from IBM but
they were probably available.
Not from IBM.
After the PC was released, IBM couldn't see any reason why anyone would
want more than two drives. So, they "fixed" that on the AT, by only
providing for two drives, at the same time that they began supporting two
different kinds of drives. Soon 3. Soon 4. So, the PC, with only one
kind of drive available, had hardware support for 4 drives. Soon
thereafter, with need for three different kinds of drives, IBM had
hardware support for only two drives. (It is not necessary to have both
720K AND 1.4M on the same machine (other than for copying), but 1.2M could
NOT completely subsume the need for 360K (if you interchanged with
others)). Aftermarket disk controller cards remained available that would
support 4 drives.
--
Fred Cisin cisin(a)xenosoft.com
XenoSoft http://www.xenosoft.com
2210 Sixth St. (510) 644-9366
Berkeley, CA 94710-2219
10:36 p.m.
This may not pertain to the 5150 but I have seen an external 5 1/4 IBM drive.
Small unit, like an Apple ext. drive. Maybe for a some portable, no idea, but
it was IBM for sure.
B.M.
"Fred Cisin (XenoSoft)" wrote:
--
http://members.xoom.com/T3C/
http://suite101.com/welcome.cfm/antique_computers
http://www.geocities.com/SiliconValley/Horizon/9107/
I've
never seen a PC type (non PS-2) type external drive from IBM but
they were probably available.
Not from IBM.
10:40 p.m.
Sorry folks, missed the " non/PS2" part. It may have been for a PS/2.
Brian Mahoney wrote:
This may not pertain to the 5150 but I have seen an
external 5 1/4 IBM drive.
Small unit, like an Apple ext. drive. Maybe for a some portable, no idea, but
it was IBM for sure.
B.M.
"Fred Cisin (XenoSoft)" wrote:
--
http://members.xoom.com/T3C/
http://suite101.com/welcome.cfm/antique_computers
http://www.geocities.com/SiliconValley/Horizon/9107/
--
http://members.xoom.com/T3C/
http://suite101.com/welcome.cfm/antique_computers
http://www.geocities.com/SiliconValley/Horizon/9107/
I've never seen a PC type (non PS-2) type external drive from IBM but
they were probably available.
Not from IBM. 
10:46 p.m.
On Mon, 5 Apr 1999, Jason Willgruber wrote:
O.K. I think I have it figured out. I'll have to
either get a cable for
the external drives (or make one). I was thinking that the 4869 was the
drive that would be used with the 5170, but it isn't. Was there a drive box
available from IBM for the 5150 (or was that the expansion chassis)?
E-mail me if you really want one. Non-IBM, though.
- don
ThAnX,
--
-Jason Willgruber
(roblwill(a)usaor.net)
ICQ#: 1730318
<http://members.tripod.com/general_1>
9408
days inactive
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days old
6 comments
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participants (5)
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bmahoney＠sprint.ca -
cisin＠xenosoft.com -
donm＠cts.com -
rigdonj＠intellistar.net -
roblwill＠usaor.net