Motorola Educational Computer Board Rev B

[Earth Person]

Greetings,

I recently acquired a Motorola Educational Computer Board after waiting for many years to one to arrive at my doorstep. Let me tell you, it has been such a fun device to work with. All the way from power up to using all the communication ports and addon areas it has available.

First, this is a rare device. I'll share pictures with this discussion. It's Revision B Serial No 1276. It arrived with an MACSS MC68000L4 MEX68KECB T6E8143 processor.

The device was won from an internal competition in Motorola Microsystems where 10 were handed out and the winner got to keep the device. The device I received was the winning device. Came with all documentation, including the TUTOR 1.2 listing printout and have the winning Pascal program that was used.

I'm unsure if all of the internal ECB's used the same power supply, but this one uses the Condor TAA-16W supply and after a careful checkout, (owner stated it hadn't been powered one since 1983) it all works well.

I haven't used the HOST serial port at this time, but I've used the TERMINAL serial port, the Tape port, and parts of the Parallel port. I dumped the original ROMs labeled from Bob Duyck (the owner tells me that was one of the engineers of the ECB project at Motorola Microsystems at the time), with TUTOR 1.3 from Jeff Tranter where some optimizations were made.

This is such an awesome find and wanted to share with others in this retro group who like M68K history.

-William

[Earth Person]

Greetings,

Including some more attachments.

-William 

[Earth Person]

Greetings,

Including the contest documents.

-William

[Earth Person]

Greetings,

Adding PSU picture and working TUTOR 1.3

-William

[Albert McCann]

That’s a beautiful thing there!

[Jaap van Ganswijk]

I recently bought a lot of CPU's from the 68000 family: 68000, 68008, 68010, 68020(?) and even an 68030. Also got a floating point coprocessor I think. Was it the 68881? All from AliExpress and or Temu. I did my master's thesis in 1988 on a compiler part I wrote for the 68000. It's not my favorite processor, but it was very impressive when it came out. We still had the competition between Intel and Motorola and the 68000 had 32 bits instructions and Intel only had the 80286 and it's clunky segment registers, bah!

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