25 Jul
2011
25 Jul
'11
3:02 p.m.
On 25 Jul 2011 at 9:30, Chris M wrote:
--- On Sun, 7/24/11, Chuck Guzis <cclist at sydex.com> wrote:
> I don't doubt that you had early access to the Pentium CPUs
> at IBM,
> but that doesn't quite settle the issue.? We were
> fooling with? pre-
> release steppings of the 80286 when IBM was shipping 64K
> 5150s with
> the 8088.
But...since you brought it up - and this is a
vintage/historic forum,
I doubt I've received answers to the questions of which were the
earliest machines/upgrades/cpu cards/sbc's used the 8086/8 and 80286
uPs. As far as IBM is concerned, I suppose the Displaywriter is the
first 8088 based system.
The DW was an 8086 system, not 8088.
That would be a relevant discussion. Another question
- did 8086/8
upgrades to 8085s predate from the ground up 8086/8 based boards?
The first 8086 board reaching the market for sale would probably be
the Intel SDK-86. The S-100 crowd closely on, with SCP's board,
Godbout and others. Bill Godbout's notable because I think he may
have been the first to integrate an 8088 and 8085 on the same S-100
board.
The 8086 was a hard sell to those wating for a real 16-bit CPU, not a
bankswitching 8085 on steriods. I wonder if IBM hadn't used it in
the 5150 if it would have been anything more than a footnote. Even
our sales guy couldn't mention the 8086 without talking about the
"Real Soon Now" 432 chipset.
Has anyone benchmarked a Z80H at 8 MHz against an 8088 at 4.77 MHz?
--Chuck