DIGITAL-LOGIC MSM800SEV/SEL Technical User's Manual page 58

DIGITAL-LOGIC AG
CMOS Map
continued...
Location Description
1Fh Byte 0
Bits 7-0 = Lower 8 bits of Cylinders
20h Byte 1
Bits 7-2 = Lower 6 bits of Landing Zone
Bits 1-0 = Upper 2 bits of Cylinders
21h Byte 2
Bits 7-4 = Lower 4 bits of Write Precompensation
Bits 3-0 = Upper 4 bits of Landing Zone
22h Byte 3
Bits 7-6 = Reserved
Bits 5-0 = Upper 6 bits of Write Precompensation
23h Byte 4
Bits 7-0 = Number of Heads
24h Byte 5
Bits 7-0 = Sectors Per Track
25h - 2Ah Custom Drive Table 1
These 6 Bytes (48 bits) contain the following data:
Cylinders
Landing Zone
Write Precompensation
Heads
Sectors/Track
25h Byte 0
Bits 7-0 = Lower 8 bits of Cylinders
26h Byte 1
Bits 7-2 = Lower 6 bits of Landing Zone
Bits 1-0 = Upper 2 bits of Cylinders
27h Byte 2
Bits 7-4 = Lower 4 bits of Write Precompensation
Bits 3-0 = Upper 4 bits of Landing Zone
28h Byte 3
Bits 7-6 = Reserved
Bits 5-0 = Upper 6 bits of Write Precompensation
29h Byte 4
Bits 7-0 = Number of Heads
2Ah Byte 5
Bits 7-0 = Sectors Per Track
2Bh Boot Password
Bit 7
Bits 6-0 = Calculated Password
2Ch SCU Password
Bit 7
Bits 6-0 = Calculated Password
Continued...
10bits
10bits
10bits
08bits
08bits
= Enable/Disable Password
0 = Disable Password
1 = Enable Password
= Enable/Disable Password
0 = Disable Password
1 = Enable Password
MSM800SEV/SEL/BEV/XEV/XEL Detailed Manual V1.7
range 0-1023
range 0-1023
range 0-1023
range 0-15
range 0-254
58