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The MOTOROLA VME, EXORciser and MicroModules Thread (6800, 6809, 68K)

marcopolo

marcopolo

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As there is no forum group dedicated to MOTOROLA old computer products, I suggest you use this single thread to discuss the following topics:

HARDWARE:
- MicroModule boards
- EXORciser
- EXORmacs
- VMEbus
- VERSAbus
- EVM (MPU, not MCU)

OPERATING SYSTEM (if used with Motorola hardware)
- FLEX
- versaDOS
- OS-9
- RT/68
- Unix 68K

SOFTWARE

So what do you think?
 
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Hi,

Does anyone know this Motorola HDD/FDD controller?
Designed by Motorola Germany
WDC on the silkscreen stands for Winchester Disk Controller, not Western Digital Corp.
 

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Hello,

In the bitsavers documentation for the Motorola M68MM01 board (6800 CPU), page 3.4 is missing and the schematics on pages 3.5 to 3.8 are of poor quality.
Does anyone have this documentation and can scan the pages in question?

Thanks,
Marc
 
marcopolo said:
Hello,

In the bitsavers documentation for the Motorola M68MM01 board (6800 CPU), page 3.4 is missing and the schematics on pages 3.5 to 3.8 are of poor quality.
Does anyone have this documentation and can scan the pages in question?

Thanks,
Marc
Click to expand...
Here you go. These are from M68MM01(D4).
pages 3.3-3.4: https://drive.google.com/file/d/190CG0pOzW2dnUzcWs4LHYPI8JXHYTTTT/view?usp=sharing
pages 3.5-3.6: https://drive.google.com/file/d/1jShSQjtfvug502FiuyXENuNq1ZzG4SZS/view?usp=sharing
pages 3.7-3.8: https://drive.google.com/file/d/1KZy8gPxBIQXdMHX-WpDgaGSH4qW4AfXN/view?usp=sharing
 

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Stan,
I'm going to need your help again, I hadn't noticed before but pages 2.2 and 2.14 are also missing.
Sorry!
 
Where can I get a card edge connector for the 86-pin bus? I would want to wire it up to some kind of breadboard thing.

It seems to be just shy of 4mm spacing, and I see a lot of references to 3.96mm. Is that the correct size?
 
Bruce,
Yes 3.96mm / 0.156” is the spacing for the 86 pin connector.
Digikey has various new connectors in stock with various terminations (wirewrap, solder eyelet, solder pin etc). See EDAC 345-086-540-201 $15.55 wirewrap or Sullins ACC43DREH $33.39 eyelet for example to make power/signal breakout easy. Ebay is another option for connectors.

BTW, the 20 pin serial edge connector and 50 pin PIA connectors on the M68MM01A are 0.1” spacing.

If you intend to expand to more than one exorbus card, several companies cloned the Motorola Exorciser/exorbus 10 slot card cage that can be still be found on ebay. Makes a handy portable enclosure, I mount a small Mean well triple voltage power supply on the back.

Current ones listed include:
Micro industries 95000021-0001D $100
or Semy Engineering cage, item 223729387716, $150
 
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What's the chance of breathing life into this? It is a Motorola M68VECPU VME processor from around 1982.
I suspect the four EEPROMS (2 for boot and 2 debug) have lost bits.
There are two DRAM boards to go with this and a nine slot VME backplane.
Sorry the photo is the best I could do this evening.

Geoff
 

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Marc,
Is that possible?
There is Bug/Monitor code, which would be Motorola code - or possible a modified version.
The other EEPROM pair is the boot loaded/disk I/O which probably uses the 6821 and 6840 and would be specific to the drive, which I don't have - or need.

Geoff
 
Could you confirm that your board is a M68VECPU100 and post good HD photos?
I asked a friend who has one, but he doesn't have the Motorola monitor but a custom software instead :(
I'm going to try something else.

Could you dump your EPROMs?
 
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