15 May
2005
15 May
'05
8:07 a.m.
Subject: Re: Anyone playing with the 8x300
From: Tom Jennings <tomj at wps.com>
Date: Sat, 14 May 2005 18:07:06 -0700 (PDT)
To:
Cc: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
On Fri, 13 May 2005, Dwight K. Elvey wrote:
Even with a rom emulator it's nasty. I played with one I have
for a while just because. It's whole concept must have originated
to solve a particular problem and was then vended out. It's not
suited at all to general computational use.
For those interested in microprogramming and building their
own computers from the instruction set up...
http://www.homebrewcpu.com/ Follow links around for many differnt CPUs.
http://www.pjrc.com/tech/8051/ide/wesley.html This is an interesting
link as it describes how to hang a IDE disk off a 8255 PPI, worth
looking at.
Allison
Allison
I'm looking at an application of the 8X300
by
Signetics. This is for a hard disk controller.
Is anyone fiddling with simmulators for this processor.
It seems like someone was a while back.
My current application is on an Olivetti M20 not
a TRS80.
Having written code for it (long, long ago though) its a rather
bizarre and hard to work with chip.
In the real (physical) world it was extremely expensive to write
code for -- code was in bipolar PROMs. Maybe there were PROM
simulators but we didn't have one, so it was burn PROM, debug with
scope. Ouch. Yuck.