Recent content by Pt68k5

OK I printed the display to PDF, here it is

if you import this to Easyeda or open it with Kicad, it has what I have done for the display schematic,it is not complete https://forum.vcfed.org/index.php?attachments/68000_display-zip.1244569/ 4D.zip is a 8051.asm file I just wrote it from scratch, going from other code on the net, I may have...

Any help on receiving serial data stream and multiplexing it on 89s52 which is another version of the 8051 (same pinout) I have play some with multiplexing and can only get 4 seven segment to show the correct info, this is just using embedded text.

If you could post that it would be great. have not made any progress

Hello Gottahack, Any progress on getting your system to work, IF not I am in California and could repair it for you? Can you post pictures of the lower board?

Looking for "computer system associates 68000" board and manuals They made a few different versions of there 68000 trainer

Hello do you still have the Motorola Development system. 68k I would like to get it if you could ship it to California

Hello I am looking for CSA Micro 68000 Trainer (computer system associates) and any manuals for any of the different versions

Hello how much would be shipping to sonora, ca 95370 for the Motorola Development system. 68k Tony

Here is tutor 1.3 as a zip file that runs on the system that you have gottahack It needs to be burned to 2764 eproms and connect to J3 which is port 1 it should connect at 9600,8,n,1 for the settings

Ok, it help but first I need to get the multiplexing of the displays down first and then start working on decoding the data stream to display on the displays then after that to get the keypad working. Gottahack question is your system working now?

Now I know a little more about decoding some of the messages, the next trick would be to get a 89S52 working to decode the display and keypad talking to the serial port at 9600 to the ECB Which is asking alot since my writing code from scratch is none.

Hello Have you tried anything else with your system? pin "1" of the 2764 should be buy the handle of the zif sockets if it is working you should get 68000 UP on the seven segment displays

Here is capturing the serial port output in powering on the system with your version of petebug P 00P!00P"00P#00P$00P%00P&00P'00P(00P)00P*00P+00P,00P-00P.00P/00P000P100P200P300P400P500P600P700P800P900P:00P;00P<00P=00P>00P?00P@00PA00PB00PC00PD00PE00P 7DP!7FP"3FP#3FP$3FP%00P&3EP'73PD01 here is...

Bruce looks good, I will try later today if I get time. Just for note on the stacked system the serial display board connects ACIA2. I had tried getting a 89s52 working with basic on the serial board but I could never get it talking to a pc host, on the ECB I connected port2 to a host pc and...