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Atmel AT89C51 microcontrollers ISA card

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yeah

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Hi, everybody :D
I was wondering if someone has information or software...... anything about this ISA Card(see attachment), It has 4 Atmel AT89C51 microcontrollers (could be usefull or reprogramable) and, it has this "ION INC. Quad stepper motor controller" ,printed on the circuit board. I've also spended like 2 weeks to figure out, how the logic will be , and came up with a schematic, "very close".
Thank you.
Best regards.
 

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