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Harry, I would look at using the 52 pin version of the 68008 as it supports 4 meg of address space and is in a plcc package which uses less space The kiwi is based on the 68008 https://www.ist-schlau.de/hardware.html And also there is the Katy which is also using the 48 pin version...

You also have mega 68000 https://www.mega-micros.co.uk/

you have the https://rosco-m68k.com/ or https://kswichit.net/68008/68008.htm which the 68008 is sold on ebay

Have you looked at, https://hackaday.io/project/177988-68k-mbc-a-3-ics-68008-homebrew-computer

The web site says Sunday April 16 2023

Want to trade a amiga 2000 for CSA 68000 CPU board

Jameco has these and others https://www.jameco.com/z/GB240-Major-Brands-2764A-EPROM-Grab-Bag-64K-DIP-28-Need-Clean-Erase-10-pcs-_2344503.html

P0 are the data bits connected to thru U2 on the serial board as a buffer, then U2 is feed to the 10 74s373 U1 thru U10 on the display board P2 outputs P2.0 thru P2.3 connects to U11 the 74154 4 to 16 decoder which is connected to the 10 latches (74s373) P2 outputs P2.4 thru P2.6 are connected...

Since I am learning as I go this is code fragments I found on the web and am using as a starting point. I was also playing with some serial port code that will turn on and off segments but not the ones I want any changes with working code would be great

Still working on decoding the led's have 4 7 segment displays counting trying to get the first 8 counting have to figure out how to sent serial data to them here is the try at getting 8 counting, it is having error. 8ACROSS_NEW2.C(182): error C141: syntax error near 'else'

Hello I have this that was working for counting on four 7 segment displays now I am trying to get it working for 8 7 seven segment displays it has this error and I have not been able to fix it. 8ACROSS_NEW2.C(182): error C141: syntax error near 'else' Any help would be great

Hello I have a board that is missing its micro-controller, I am trying to recreate it from scratch It has 24 seven segment displays and 64 leds to show status each row has a data latch and has 4 driver transistors to turn on and off the displays It would receive a serial data stream and then...

YES it helps and I will try contacting Vic, He posted once back in 2014 or so and at that time he was no help Thanks for the info

Hello I have tried your code but since my programming is almost not I can not figure out how define your column statements, so I just get errors when trying to build it.

Sounds good, I will read the manual some more. My notes where before I found the manual on ebay and are almost 2 years ago and are for the 8051 interface

Still searching for the code that would display 6800 did find some notes that show info for P2 output All of these are for P2 0X00 = DS4 0X01 = DS8 0X02 = DS12 0X03 = CR 25 THRU 32 0X04 = DS16 0X05 = DS20 0X06 = CR57 THRU CR64 0X07 = DS24 0X08 = DS28 0X09 = UNKOWN 0X0A = UNKOWN 0X0B = UNKOWN...

Thanks for the update, I trying the code I posted it looks like it was the wrong file, I am still looking for the one where I had ds1 thru ds4 working to show numbers. I will have more time on Friday and Saturday to look for it and run test. a lot of the stuff I have found does on work at all so...

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.