HP Vectra Technical Reference Manual page 366

Table B.8
Flexible Disc Drive Error Status (40:041 H)
".
Bit
Data
07H
1
06H
1
OSH
1
04H-OOH
1
2
3
4
6
8
9
10H
~
Definition
Timeout error; disc failed to respond in time
Seek error; seek to track failed
Controller error; disc controller chip failed
Bad cc)mmand; invalid command request
Address error; address mark on disc not found
Write protect error
Sector not found; unable to locate sector, disc damaged or
unformatted
Media changed; the drive door was opened on a 1.2MB disc
drive
DMA error; DMA failed to respond in time
Segment wrap; attempt to perform DMA across a segment
boundary
CRC error; erc check on data failed
8.2.6 Video Display Data Area
This area is used by the video driver to store current screen parameters and cursor positions.
40:049H
01 S40_CRT_MODE
Current video mode
40:04AH
02 S40_CRT_WIDTH
Current
#
of screen columns
40:04CH
02
S40_CRT_LENGTH
Current length of screen in bytes
40:04EH
02
S40_CRT_PAGE~DR
Starting address of current display page
40:0S0H
10
S40_CRT_CURSO~POS
Cursor coordinates (row, column) up to
8 pages
40:060H
02 S40_CRT_CU
RSO~MODE
Current cursor mode setting
40:062H
01 S40_CRT_DISPLAY_PAGE
Current display page
Memory Map 357