Altair & IMSAI Emulators found
Stephen R. Griswold
It's amazing what you run into, when you're trying to do a search for
TRS-80 Model 4 info
on the web.. Webcrawler came-up with a page dedicated entirely to
emulators of all
platforms, and I do mean ALL Platforms! The one that caught my interest,
was an ALTAIR listing (link:
http://members.aol.com/chrissalo/emu6.htm#ealtair )
one of the items on this page, points to files available from
http://www.nwlink.com/~tigger/altair.html, where the file ALTAIR.ZIP
(Win-3.x version)
& ALTAIR32.ZIP (Win-NT & '95 version) are available for download.
Well, finally forced into the Windows world, by (a) tape backup software
needs, and (b), Email handling (juno's software), I decided, let
Microsoft eat a little Historic crow.
The ALTAIR/ZIP file contains two programs, and a support file..
ALTAIR.EXE
(Altair-8800 front panel emulator), and IMSAI.EXE (IMSAI-8080 front-panel
emulator).
the emulators are strictly front-panel display, which actually work..
I'm assuming Intel 8080 CPU, no ideas how much memory, but appear fully
functional replicas of the machines. I haven't had a chance to
dissect-down a simple 8080 assembly routine, But I'm
willing to bet it would work out.. Although not CP/M, it's nice to see an
old workhorse, at
work, even for a simulation.
I'll try to get the software up onto Circuit Cellar, INK!'s BBS
(bbs.circellar.com, hopefully
ftp.circellar.com) I seem to remember someone mentioning the idea of
putting one together. At least this way would save them some of the
trouble of re-inventing the wheel.
Stephen Griswold
stephen....@circellar.com (or @micromint.com)
gelf...@juno.com
Greg Holdren
Stephen R. Griswold (gelf...@JUNO.COM) wrote:
:
: the emulators are strictly front-panel display, which actually work..
: I'm assuming Intel 8080 CPU, no ideas how much memory, but appear fully
: functional replicas of the machines. I haven't had a chance to
: dissect-down a simple 8080 assembly routine, But I'm
: willing to bet it would work out.. Although not CP/M, it's nice to see an
: old workhorse, at
: work, even for a simulation.
Does anyone know what the I/O or memory mapped addresses are for the
front panel lights? I would like to run a program to and wite out to the
LEDs.
TNX
Greg Holdren
gr...@wx.rose.hp.com
--
Greg Holdren
gr...@wx.rose.hp.com
RandyMc482
Greg Holdren wrote:
> Does anyone know what the I/O or memory mapped addresses are for the
> front panel lights? I would like to run a program to and wite out to
the
> LEDs.
> TNX
> Greg Holdren
> gr...@wx.rose.hp.com
Most of the lights were true representation of the S100 bus (no port).
But there was one port (status port) 0FFh that read eight switches and
would light up eight leds.
Steven Bjork
In article <5n4926$fr...@hpcc883.corp.hp.com>,
Greg Holdren <gr...@wx.rose.hp.com> wrote:
>Does anyone know what the I/O or memory mapped addresses are for the
>front panel lights? I would like to run a program to and wite out to the
>LEDs.
Hm... I think 0xff will write to the led's, and read the
low eight switches.
../Steven
David Bowerman
Greg Holdren wrote in a message to All:
GH> Does anyone know what the I/O or memory mapped addresses are for
GH> the front panel lights? I would like to run a program to and wite
GH> out to the LEDs.
The address, data and status bits were buffered directly off the S-100 bus.
There was a status port at 0FFH that had leds as outputs and the lower 8
address/data switches as the inputs (going by memory here so I could be wrong).
Regards,
David