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  1. P

    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    OK I printed the display to PDF, here it is
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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...
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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.
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    If you could post that it would be great. have not made any progress
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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?
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    California looking for "computer system associates 68000"

    Looking for "computer system associates 68000" board and manuals They made a few different versions of there 68000 trainer
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    Pacific Northwest Doing some shop clearing Kent, Wa.

    Hello do you still have the Motorola Development system. 68k I would like to get it if you could ship it to California
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    California Looking for CSA Micro 68000 Trainer

    Hello I am looking for CSA Micro 68000 Trainer (computer system associates) and any manuals for any of the different versions
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    Pacific Northwest Doing some shop clearing Kent, Wa.

    Hello how much would be shipping to sonora, ca 95370 for the Motorola Development system. 68k Tony
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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?
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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.
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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...
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    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...
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    this is the version of petebug that is on the MECB and match the manual for the MECB, The extra-wide system that has the custom 68000 board Has the 2 Acia ports the first one is at FD0041 and the second one is at FD0063 and then it has the 2 PIA'S (6821) at FD0000 (keyboard PIA) and FD0001...
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    Hello that is where the problem is the chip that is there is on I wrote some test code a year + ago in trying to figure how the multiplexing of the displays worked the board was missing the C8751 chip, for testing I went to the AT89S52 since it can just be reprogrammed with out having to use a...
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    A newer version of my Sys3 board as I am calling it https://forum.vcfed.org/index.php?threads/computer-systems-associates-motorola-68k-trainer.41766/
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    Here is a KIcad project that I started showing how the small serial board connects to the display board it is not complete and may have a few errors In a few test I tried I used the AT89S52 which has the same pinout and can be erased and reprogrammed ON the extra wide version the display board...
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    Stunning Motorola 68000 system made by Computer System Associates USA circa 1984

    IF you look at the first page of this thread it has pictures of the added board on top of the display boad which uses a c8751 intel microconroller. And yes the display board is stacked on top of the 68kecb board
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