IBM PC CONVERTIBLE

003E ??
= 0080
003F
??
" 0080
" 0020
0040
??
" 0025
0041
??
" 0080
" 0040
" 0020
" 0010
= 0009
" 0008
" 0006
" 0004
" 0003
= 0002
= 0001
0042
0049
004A
004C
004E
0050
0060
0062
0063
0065
0066
07 [
??
????
????
????
08
????
??
????
??
??
DISKETTE DATA AREAS
EEK STATUS AND FLAGS
SEEK-STATUS DB
INLFLAG
EQU
MOTOR STATUS AN
MOTOR_STATUS
WRITE-OP
MOTOILOK
MOTOILCOUNT
MOTOR_WAIT
DB
EQU
EQU
DB
EQU
080H
DRIVE RECALIBRATION STATUS
BIT 3-0 " DRV 3-0 NEEDS RECAL
BEFORE NEXT SEEK IF BIT IS " 0
BIT 7 " INTERRUPT OCCURRED
MOTOR OFF DELAY COUNT
080H
020H
37
MOTOR STATUS
CURRENT OPERATION IS A WRITE
MOTOR ON FOR 500 MSEC
BIT 3-0 " DRV 3-0 IS CNTRLY
RUNNING
TIME OUT CNTR FOR DRIVE OFF
2 SECS OF CNTS FOR MOTOR OFF
DISKETTE OP RAT ON END STATUS
DISKETTE_STATUS DB
TIME_OUT EQU
BAD_SEEK EQU
BAD_NEC EQU
BAD_CRC EQU
DMILBOUNDARY EQU
BAD_DMA EQU
MEDIILCHANGE EQU
RECORD_NOLFND EQU
WRITE_PROTECT EQU
BAD..J\DDR~ARK EQU
BAD_CMD EQU
80H
40H
20H
10H
09H
08H
06H
04H
03H
02H
01H
RETURN CODE STATUS BYTE
ATTACH FAILED TO RESPOND
SEEK OPERATION FAILED
NEC CONTROLLER HAS FAILED
BAD CRC ON DISKETTE READ
ATMPT TO DMA CROSS 64K BNDRY
DMA OVERRUN ON OPERATION
MEDIA CHANGED ON 3.5" DRIVES
REQUESTED SECTOR NOT FOUND
WRITE ATTEMP ON WRT PROT DSK
ADDRESS MARK NOT FOUND
BAD CMD PASSED TO DSKT I/O
0 SKETTE CONTROLLER STATUS
NECSTATUS DB 7 DUP(?) ; STATUS BYTES FROM CNTLR
??
; ------- --- - - - - - - -- --- -- - - - - - - - - - - - - - - - --
;
VIDEO DISPLAY DATA AREA
---- --- - --- - - - - - - - - - - - -- - - - - - - - - -- - -- - --
CRLMODE DB CURRENT CRT MODE
CRLCOLS
OW NUMBER OF COLUMNS ON SCREEN
CRLLEN OW LENGTH OF REGEN IN BYTES
CRLSTART OW STARTING ADDR IN REGEN BFR
CURSOILPOSN
OW B DUP(?) ; CURSOR EACH OF UP TO 8 PGS
????
CURSOUODE
OW
CURRENT CURSOR MODE SETTING
ACTIVE-PAGE
DB CURRENT PAGE BEING DISPLAYED
ADDIL6845 OW BASE AD DR FOR ACT DSPL Y CARD
CRT~ODE-SET DB CRNT SETTING OF THE 3X8 REG
CRLPALETTE
08
CRNT PALETTE SETTING COLOR CD
ROM BIOS 2-19