27 Apr
2002
27 Apr
'02
7:42 p.m.
On Sat, 27 Apr 2002, Erik S. Klein wrote:
I'm pretty sure that the single sided drives were
long gone by the time
the 256K motherboard came out.
Good point
Of course, I've already proven the worth of my
memory, so. . . :)
I really don't remember the IBM sequence, since I used aftermarket drives
(same Tandon drives for ~$200 v IBM's $540)
I do remember that I was using double sided drives with the "leaked" patch
for quite a while before IBM made them available along with support in
PC-DOS 1.10.
I have no idea when they changed the motherboard from 16-64K to 64-256K.
For the machine in question, the 64K to 192K upgrade could be either:
1) filling two more rows of RAM on a 64-256K motherboard
2) adding a 128K RAM card to an already full 16-64K motherboard.
BTW, when somebody says "64K motherboard", do they mean the 16-64K or the
64-256K?
Did IBM ever OFFICIALLY support the 640K conversion of the 64-256K board?
--
Grumpy Ol' Fred cisin(a)xenosoft.com