Cromemco 4FDC, How do you format a disk?

From: Bill Sudbrink <>
Date: Tue Jul 27 16:35:50 1999

> BTW, I wrote the formatter for CP/M on the 16FDC (in Turbo Pascal no less
> :-)) and it simply loaded up a buffer, then did a write track and stuffed
> the buffer with an OUTIR instruction. (the board did wait states so this
> worked.) The process involved creating a buffer and using special 8 bit
> codes for "sector gap" and "index mark" and "sync mark". I've long since

YES! Those codes (and when to fire them) are all I need to know!
According to the 4FDC docs, F7 is write CRC (2 bytes).
If I could just get the format of that buffer...

Bill Sudbrink
Received on Tue Jul 27 1999 - 16:35:50 BST

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