Mailinglist Archive: opensuse (3337 mails)

< Previous Next >
Re: [Fwd: Re: [SLE] Real Numbers representation in Tcl language]
  • From: Jim Cunning <jcunning@xxxxxxxxxxxxxxx>
  • Date: Wed, 12 Apr 2006 17:59:52 -0700
  • Message-id: <200604121759.52614.jcunning@xxxxxxxxxxxxxxx>
On Wednesday 12 April 2006 16:45, Patrick Shanahan wrote:
> I believe the 80286 possessed floating point but perhaps it first
> appeared in the 80186 which was almost unknown. The 8086 and 8088 did
> not.
AFAIK the 80286 and 80386 (mentioned earlier by Carlos E. R.) only had
floating point coprocessor (80[23]87) chips, like the 8087 for the 8086 and
8088 CPUs. The 80486DX processor had on-chip floating point, as do all
Pentiums, I believe.

The 80186 and 80188 were 16-bit bus and 8-bit bus versions of the 8086 and
8088 that included a few more instructions, plus on-chip DMA and interrupt
controllers, counter/timers, and logic to generate chip-select signals that
reduced the number of chips needed to build embedded systems. There were a
few consumer PC-type products using the 80186/80188, but many embedded
computer products. There was also an 80187 FP coprocessor for the
80188/80186.

Jim

< Previous Next >
Follow Ups