ZiLOG System 8000 Hardware Reference Manual

HRM
Zilog
HRM
ST is returned by the SMDC when the operation is complete.
It contains an error identification·code. For some errors,
it is necessary to refer to S8 and DS below for details.
0: no error
1: initialization error (no DT or IV)
CR:CMD 4-7 and 1 must be given
2: sector overrun error
read or write gate on at end of sector
3: DMA memory error (ME) returned in SR:ES*
* NOTE: When the SMDC detects a parity
error, it does NOT rewrite the
packet, nor does it update the
packet status in the dispatch
table to DONE. A ME code in
SR:ES is the only indication
of a DMA parity error.
4: select error
no drive or multiple drives selected
5: CT (count) invalid
6: SMD dual access busy
7: multiple rezero error
rezero didn't correct SMD fault
8: SMD status error (see DS)
9: odd DMA address
10: pack overflow
multiple-sector read/write past end of pack
11: power failure detected during read/write
12: undefined operation (CM:CMD)
13: unrecovered data error
14: sector not found
15: write protect violation
timeout errors:
32: idle loop
33: waiting for IP and IUS to clear
34: waiting for DMA to complete
35: waiting for SMD on-cylinder
36: waiting for SMD servo clock
37: waiting for SMD data clock
38: waiting for sector/index mark
39: waiting for ID sync
40: waiting for data sync
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Zilog
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ZiLOG System 8000 Specifications

General

Brand	ZiLOG
Model	System 8000
Category	Desktop
Language	English