> > the original IBM Personal Computer, introduced in 1981, with a 62.5 watt
>
> {\pedantic Wasn't it a 63.5W PSU}
One of the first PCs that I got came from IBM with a black power supply
with a white switch (1.2*S/H). Then they immediately switched to the
silver colored one with the red switch. If I believe the Tech Ref and the
sticker on the supply, then there was a slight change increasing the 5V
power and decreasing the 12V.
> > power supply, Type 1 or 2 motherboard, INTEL 8088 clocked at 4.77 MHz, four
> > ROM sockets, five 8-bit expansion adapter slots, two full height diskette
As long as we're being unnecessarily picky (-: FIVE ROMS, SIX ROM
sockets! One for the BIOS, plus four for BASIC, plus an extra.
Unconfirmed story: The IBM engineers were worried that MICROS~1 would
fail to squeeze the BASIC into the 32K (32768 Bytes) that MICROS~1 had
said would be needed for it, so they provided an extra ROM socket for
overflow. The MICROS~1 programmers were a little offended that IBM hadn't
trusted them on the accuracy of their estimate, so, when they came in a
little under, they padded out the BASIC with a few incomplete commands to
bring the total to an EXACT 32768.
--
Grumpy Ol' Fred cisin_at_xenosoft.com
<A HREF= "http://www.xenosoft.com/dogears" >DogEars</A>
Received on Tue May 18 1999 - 19:01:55 BST