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A-17
A
BYTE OFFSET
VALUE COMMENTS
Mode Select Header
000Reserved
1 (Note 1) Media type
200Reserved
3 08 Block descriptor length
Block Descriptor
000Reserved
1 00 Number of blocks (MSB)
2 00 Number of blocks
3 00 Number of blocks (LSB)
400Reserved
5 00 Block length (MSB)
6(Note)Block length
7 (Note) Block length (LSB)
NOTES:
1. The media type is selected using bit flags in the
attach packet attributes word, offset $10.
ATTRIBUTE FLAGS
MEDIA
ALL SECTORS 500K BITS/ MFM
TYPE
SAME BIT 7 SEC BIT 3 BIT 0 NOTES
1B111PCAT
0A 0 1 1 8 in., FM/MFM
(VERSAdos
double
density)
060108", FM
(VERSAdos
single density)
16101PCXT