DIGITAL-LOGIC Microspace MSM586SEN Technical User Manual page 299

DIGITAL-LOGIC AG
BIOS Data Area Definitions
Location Description
50h - 5Fh Position of cursor for each video page. Current cursor po-
sition is stored two bytes per page. First byte specifies the
column, the second byte specifies the row.
60h - 61h Start and end lines for 6845-compatible cursor type.
= starting scan line, 61h = ending scan line.
62h Current Video Display Page
63h - 64h 6845-compatible I/O port address for current mode
3B4h
3D4h
65h Register for current mode select
66h Current palette setting
67 - 6Ah Address of adapter ROM
6Bh Last interrupt the occurred
6Ch - 6Dh Low word of timer count
6Eh - 6Fh High word of timer count
70h Timer count for 24-hour rollover flag
71h Break key flag
72h - 73h Reset flag
1243h
74h Status of last hard disk operation
00h
01h
02h
03h
04h
05h
08h
09h
0Ah
0Bh
0Dh
0Eh
0Fh
10h
11h
20h
40h
80h
AAh
BBh
CCh
E0h
FFh
75h Number of hard drives
76h - 77h Work area for hard disk
Continued...
Continued...
= Monochrome
= Color
= Soft reset. Memory test is bypassed.
= No error
= Invalid function requested
= Address mark not located
= Write protect error
= Sector not found
= Reset failed
= DMA overrun error
= Data boundary error
= Bad sector flag selected
= Bad track detected
= Invalid number of sectors on format
= Control data address mark detected
= DMA arbitration level out of range
= ECC or CRC error
= Data error corrected by ECC
= Controller failure
= Seek operation failure
= Timeout
= Drive not ready
= Undefined error occurred
= Write fault on selected drive
= Status error or error register = 0
= Sense operation failed
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MSM586SEN/SEV Manual V1.5E
60h