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Thanks for your response. I have loaded ZSM onto my SC720 ZSDOS system and used it to assemble a simple program. Worked like a charm.

Thanks for the info. I didn't know that the S was an error message. I guess I need to find a Z80 assembler for CP/M 2.2.

Thanks for the suggestion. That will be my next step.

I have no idea. It's the assembler that came with the copy of CP/M that was recommended for the SC720 Z80 computer kit. Is there some way I can check this (or maybe I already have)?

Hi I have a simple program named leds.asm as shown below: ORG 0100h LD A,3 OUT (0),A...

Thanks for your reply. I understand the format of the S-records and how they work. I have implemented loading S-records into memory and executing the resulting program on various platforms including the 6502, 6809, 68000, STM32F411 and bare metal Raspberry Pi Zero. It just seemed like a strange...

I'm not planning on doing any bare metal programming on 68K-MBC. I've done that on various microcontrollers, raspberry pi zero and computers I've designed and built using the 6502, 6809 and 68008 (wire wrapping all the connections, no PCBs).

Thanks for your response. I thought as the example program came with the 68K_MBC it should work. I discovered the BDOS functions late last night and I have been playing around with them all day. They seem to do exactly what I want. I appreciate your help...Randy

Here is the example program for the 68K_MBC. C>type f:asmdemo.s * ================================================================================= * IOS equates IOBASE EQU $FFFFC ; Address base for the I/O ports EXCWR_PORT EQU IOBASE+0 ; Address of the...

I'm trying use sload on a 68K-MBC to load and run programs on the 68K-MBC. I'm using minicom with a newline tx delay of 90ms. I've tried baud rates of 115200, 19200 and 9600 with the same result. I'm trying to load the sample hello world program with s1/s8 s-records. The sample file looks...

I'm trying to get the demo hello world assembly language program working on the 68K-MBC under CP/M 68K. It assembles and links without any error messages. When I run it there is no output, and no errors, after a second or two I get the CP/M command line prompt. I have no prior experience with...

I'd like to mark this thread as solved.

Thank you for the link. It looks promising. I did find a link to this project on hackaday, but it was not as good as this one...Randy.

Hi, I just received a 68K-MBC full kit. I was expecting there to be instructions on assembly, setup and usage. I'm finding it very difficult to find any useful documentation on the 68K-MBC. If anyone can point me to online documentation regarding this or provide me with information I'd really...

It's been so long I can't remember the details. I believe I ordered the HUMBUG PROMs for the PERCOM board separately and then installed them myself. I'm not using HUMBUG anymore. I ported over a monitor I wrote for a M6809 SBC I designed and built myself. It's nothing fancy.

I was looking for documentation of the version of Humbug in the PROMs on my PERCOM 6809 CPU board. I wasn't trying to use the version I found on the internet. What I found was not the same as on the CPU board. However, from the HUMBUG source code I found I was able to determine which commands...

When I was taking a course on APL back in the '70s it seemed that the goal of my fellow students was to cram as much into one line of code as possible.

A friend of mine wrote an interactive football game in APL that mimicked the STRATOMATIC football board game. That got me interested in learning to program. In the fall of 1970 I bought a book on FORTRAN IV. As a University student I could use the IBM System 360 mainframe for free as long as my...

After a bit of thought and fiddling around a bit I think I have the correct documentation for my board. How do I close this post as solved?

I found HUMBUG09.TXT in several places (they all seem to be the same) but it is quite different from the version I have. It may be sufficient for what I need. Once again thank you for your help.