samuelm@umd5.umd.edu (Samuel J. Mitchell) (09/13/90)
Hello,
I just purchased a surplus Commodore 8032-32B, manufactured
in 1980. I realize that it is not quite the computing powerhouse
it once claimed to be, but my interests are chiefly in 6502 assembly
and some simple hardware projects. I have three major questions
regarding this relic:
1) Where ( if ever ) were memory maps, io port pin-outs, CBM8032
tricks&traps, etc. published?
Titles of reference books, magazine articles, or CBM manuals
specific to the CBM 8032 would all be appreciated. Currently,
I have no documentation at all for this machine.
2) On the side of the machine, there are four switches ( see below )
<--keyboard (front ) power cord (back)-->
3-way 3-way 2-way 2-way
switch switch switch switch
| R R P | 6 6 P | | R U R | O U O |
| E / R | 8 5 R | | A D O | F D N |
| A W O | 0 0 O | | M 1 M | F 1 |
| D G | 9 2 G | | 2 | 1 |
|__________|__________| |__________|__________|
| | | |
| | | |
The only switch that seems to have any effect is the 3-way
6502/6809/PROG: when set to 6502, the CBM powers up with the
normal Basic 4.0, nnnnn bytes free message. When switched to
6809 mode, the screen clears, and the cursor sits in the upper
left of the screen (home), flickers slightly, and does nothing
else interesting. Do I have a bad 6809? Do I need to set the
other switches differently? What do the other switches DO? Is
there a God? Any answers would be appreciated.
3) I have no peripherals. If anyone has a working datasette
(old cassette drive) they will part with cheaply, I'm
interested. Alternatively, if there are any circuit diagrams
for building a simple interface to a 1200 baud Hayes-compat.
modem, I have a modem I can use to do io with a vaxstation on
the net. Ref's to diagrams would be helpful.
Thanks for your help,
- Sam (samuelm@umd5.umd.edu) (301) 405-6912 work.sjk@ut-emx (bob) (09/14/90)
Samuel J. Mitchell writes: > Hello, > I just purchased a surplus Commodore 8032-32B, manufactured > in 1980. I realize that it is not quite the computing powerhouse > it once claimed to be, but my interests are chiefly in 6502 assembly > and some simple hardware projects. I have three major questions > regarding this relic: Surplus? Are others available? > 1) Where ( if ever ) were memory maps, io port pin-outs, CBM8032 > tricks&traps, etc. published? There is a great bok out with memory maps for all the PETs. Unfortunately, I'm out of town right now and can't get to my copy. E-mail in a week if you still need some information. I should have a fairly complete memory map and even some PD assemblers. > 2) On the side of the machine, there are four switches ( see below ) > > <--keyboard (front ) power cord (back)--> > > 3-way 3-way 2-way 2-way > switch switch switch switch > > | R R P | 6 6 P | | R U R | O U O | > | E / R | 8 5 R | | A D O | F D N | > | A W O | 0 0 O | | M 1 M | F 1 | > | D G | 9 2 G | | 2 | 1 | > |__________|__________| |__________|__________| > | | | | > | | | | > > The only switch that seems to have any effect is the 3-way > 6502/6809/PROG: when set to 6502, the CBM powers up with the > normal Basic 4.0, nnnnn bytes free message. When switched to > 6809 mode, the screen clears, and the cursor sits in the upper > left of the screen (home), flickers slightly, and does nothing > else interesting. Do I have a bad 6809? Do I need to set the > other switches differently? What do the other switches DO? Is > there a God? Any answers would be appreciated. Wow! What you reall have in not an 8032, but a Super PET model SP-9000. It was CBM's top-of-the-line scientific machine. (I have one, too. Whole system cost more tham my Amiga.) In 6502 mode, the machine behaves just like an 8032. When you switch to the 6809 mode, a menu should appear asking you which language to load from disc. It came with a Waterloo version of BASIC, Pascal, Fortran, APL, COBOL, and assembly. You must have a disc drive for these languages, however; they are not in ROM. They load into an extra board of 64K which is addressable to the 8032 through a 4K window. The switch next to the 6809 switch is a write protect for this RAM. (It's been a while since I've used this much, so I may be mistaken, but I know the general nature of this beast althought I may be confused on the specifics.) I can't quite remember the other two switches but it has something to do with the two expansion ROMs on the 8032 side. I believe there are two ROMS one at $9000 and the other at $a000. The 4k address window sits at $9000, so you flick a switch to switch between $9000 ROM and RAM. I seem to remember my machine having only two switches (the 6502/6509 and the Read/Prog); I had to change some locations in memory to access either the ROM or RAM. The UD11 switch has me confounded. The flickering cursor sounds familiar, but you should get this language menu as well. Try changing the other switches (though I'm sure you have.) Not sure what is wrong. Open the PET up and make sure this SP-9000 board is in there. It should be a second (sometimes third) layer with a cable runing onto the PET motherboard's 6502 slot. Both the 6809 and the 6502 should be on the SuperPET board. > 3) I have no peripherals. If anyone has a working datasette > (old cassette drive) they will part with cheaply, I'm > interested. Alternatively, if there are any circuit diagrams > for building a simple interface to a 1200 baud Hayes-compat. > modem, I have a modem I can use to do io with a vaxstation on > the net. Ref's to diagrams would be helpful. > Don't have a spare cassette, though you will also need a disc drive to use the 6809 stuff. I have a 4040 drive for mine, but the 8050s were standard for this machine. They do come up for sale once in a while. The SuperPET board has it's own RS-232 port on it and there are lots of terminal programs around for it (I have some on 4040 disc) so hooking up a modem there shouldn't be hard. I've always used a modem on the PET side through the parallel prot and a cable and software from Skyles Electric Works in Mt. View, CA. Don't know where to find schematics for such a cable. Maybe back issues of COMPUTE! Good luck. Feel free to E-mail me if you want more specifics; I'd be happy to dig through my docs again. I used to know that machine inside and out! Scot sjk@astro.as.utexas.edu sjk@emx.utexas.edu