DIGITAL-LOGIC MICROSPACE MSEP800, Technical User'S Manual

Page: 46 / 140

DIGITAL-LOGIC AG
MSEP800 Manual V1.0G
46
CMOS Map
Continued...
Location Description
1Ch Reserved
1Dh EMS Memory Size Low Byte
1Eh EMS Memory Size High Byte
1Fh - 24h Custom Drive Table 0
These 6 bytes (48 bits) contain the following data:
Cylinders
Landing Zone 10 bits
Write Precomp 10 bits
Heads
Sectors/Track 0 8 bits
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 10 bits
Write Precomp 10 bits
Heads
Sectors/Track 0 8 bits
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
Continued...