Original IBM PC specs

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hoff...@ucbeh.san.uc.edu

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Apr 9, 1993, 10:19:44 AM4/9/93
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IBM PC Specs:

There was another guy who posted a *wonderful* list of stuff on these, but here
is my best shot.

The PC can be identified externally by IBM Personal Computer in the badge area.
It may have 0, 1 or 2 floppy drives.
In the rear of the unit you will find a connector next to the keyboard
connector for the tape cassette drive. Also only five expansion card spaces
will be visible. Model number is 5150.
Internally, a 63.5w power supply will be found. The early motherboards could
carry only 64k, but later versions handled up to 256k. Expansion cards can
bring them up to 640k. The floppies may be single sided 160k or double sided
360k. Only five expansion slots are available, in contrast to the XT's eight.
This minor detail prevents the case from holding a newer mini AT or XT
motherboard, as well as the fact that with the cassette port next to the
keyboard, the XT's keyboard connector is blocked by the case.
Two DIP switches are present on the PC motherboard, as opposed to the XT's one.

The monitor (green mono) is model 5151, and *can* be used with a Hercules
graphics card to display graphics. The card originally supplied with the PC is
, however, limited to ASCII text& graphics only. It plugs into the switched
outlet on the back of the power supply.

A hard drive with XT-type controller can be added, but I recommend not trying a
full -height 5 1/4" hard drive, as I have run into trouble with the 63.5w
supply not having the oomph to spool up those big heavy platters.
Seagate 225 class drives have been used with much success. If the unit carries
160k single sided drives, 360's can be directly substituted with no change in
the unit.

The keyboard for the XT and PC are identical. 8087 coprocessor is supported.

Hope this helps!
Matt


R.v.Kampen

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Apr 15, 1993, 1:39:19 PM4/15/93
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In article <1993Apr9.1...@ucbeh.san.uc.edu> hoff...@ucbeh.san.uc.edu writes:
>A hard drive with XT-type controller can be added, but I recommend not trying a
>full -height 5 1/4" hard drive, as I have run into trouble with the 63.5w
>supply not having the oomph to spool up those big heavy platters.
>
one way to get the system going with one floppy drive and one hard
disk on a 63 watt power supply is to first disconnect the power from
the floppy drive than turn on the pc, you will notice the hard drive
having a real difficult time getting up to speed, but it manages.
when booting is finished, plug in your floppy drive, now it will work.

(ok I know this is not very user friendly, maybe you are better off
buying a 486-66 with 300 watt power supply or something like that)

willem

DONALD A. O'SHALL

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Apr 17, 1993, 8:56:30 AM4/17/93
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In article <C5JD1...@dutiws.twi.tudelft.nl>, win...@dutiws.twi.tudelft.nl (R.
v.Kampen) writes:
>In article <1993Apr9.1...@ucbeh.san.uc.edu> hoff...@ucbeh.san.uc.edu wr
The newer the drive, the less problem you will have. The old ten and fifteen
meg full heights were power hogs, but I have over twenty units that I set up
running flawlessly with half height drives and/or hard cards.

--

DA...@NS1.CC.LEHIGH.EDU (Don)

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