Subject: Re: trying to design my first micro- looking for "prior art"
(6100and6809)
From: woodelf <bfranchuk at jetnet.ab.ca>
Date: Fri, 02 Dec 2005 22:11:11 -0700
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at
classiccmp.org>
Allison wrote:
There are other CPUs like 8085, Z80 and relatives
with sims around for them.
Never minding 6800 and 6502s. So its a matter of taste.
The 6100 makes a nice basic PDP-8 but remember the 8 requires paper tape
for the basic system.
And thats a problem because??? If your using a TTY then tape is already there.
Building a reader is trivial, I've done it. If you arr the kind that cant
well you still want the interface to match up as you use a PC as PT:. Most
will opt for the latter as there are a lot of "tapes" on line.
The biggest limitation with the 6100 is 4k of memory. I have an
Intersil Sampler and it's fun to use but 4KW is a big problem. Then
it's build an EMA (in ttl it's not bad) or find a 6101 MEDIC which has
the EMA in it.
In all cases
having a sim for the target machine will make design work and
software more real and less dreaming.
I find it the other way around, sims seem less real than hardware
sitting on board even the design
is never finished. A magnetic tape drive and old I/O does seem to feel
like a massive computer
even if todays equivelant fits on a stick of chewing gum.
Yes, but if your developing software a sim allows you to do that while waiting
for a part or whatever. I have the same general complaint as it's not real
hardware and I cant test my construction. Often I can test the logic or
develop test or driver programs.
Allison