ZiLOG System 8000 - Page 263

HRM
C
D
E
F
FRD
RLONG
READ
SIZE
Zilog
Write data
Parameters: UN,CT,AH,AL,CY,HD,SC
Format Read track (controller reads
and transmits sector IDs; CT is #
sector IDs to read).
Parameters: UN,CT,AH,AL,CY,HD,SC
Read Long
(controller reads data
and 4 bytes of ECC)
Parameters: UN,CT,AH,AL,CY,HD,SC
Read
data
Parameters: UN
Size Disk if formatted (controller
returns size in CY, HD, SC fields;
returns bad ending status if it
cannot size disk.)
HRM
CM:NO
CM:NE
CM:NR
ST:ES
Code
No offsets during retries
No Error Correction
No Retries; Use data in CM:OF for strobe timing
Packet Command Ending Status:
Name and optional description
o No Error OR Soft Error
(NOTE: if ES = 0, but any of SB bits
are set, there was a SOFT error; if
ES = 0 and all S8 bits are clear,
NO error occurred.)
Initialization error
Initialization sequence incomplete
2 Sector Overrun
3 DMA Error - Memory Parity Error
(NOTE: in case of a DMA Error,
controller does NOT update packet;
only status Register will have
this code in ES field)
4 Select Error - 0 drives or multiple drives
selected
5 Byte/Sec Count Error - Odd byte count or
sector count = 0
6
Dual-Access Busy Err
7 Rezero error - A rezero did not clear fault
8 Drive status - One or more bad SMD status
bits in DS
9 Odd DMA Address
10 Pack Overflow
11 Power Fail Detected
12 Invalid Packet Command - CM:PCMD invalid
13 Hard Data Error - Data error was unrecovered
A-32
Zilog
A-32