MultiDOS Zaps
Allow Model III v1.7 to boot on a Model 4P
To get v1.7 to boot on a Model 4P you first need to put MODELA/III onto the diskette. Once you do that, make the following zap:
Track 0, sector 1, starting with byte 0 (all values are hexadecimal):
Note: The reason for this is that the Model 4P boot ROM expects the first two bytes to be 00H, FEH, then the hexadecimal track for the directory.
Allow Model III v2.0 to boot on a Model 4P
To get v2.00 to boot on a Model 4P you first need to put MODELA/III onto the diskette. Once you do that, make the following zap:
Track 0, sector 1, starting with byte 0 (all values are hexadecimal):
Note: The reason for this is that the Model 4P boot ROM expects the first two bytes to be 00H, FEH, then the hexadecimal track for the directory.