IBM PC CONVERTIBLE

Section 2. ROM BIOS Listing
ROM Map .................................. 2-4
Common Equates and Data Areas ................ 2-7
Common Equates .......................... 2-7
Processor Interrupt Vector Area ............. 2-16
POST and Bootstrap Temporary Stack ........ 2-16
BIOS Data Areas ......................... 2-17
POST Temporary Data Area ................ 2-23
Common Macros ......................... 2-24
Nonmaskable Interrupt Handler
(B 10NMIH) ..... 2-26
First Level Interrupt Handler
(NMLFLIH) .... 2-26
Diskette Resync (DSKT_RESYNC)
.......... 2-29
Keyboard Data NMI
(KBNMLDA T A) ....... 2-35
Keyboard Clear
NMI (KYBD_CLR) .......... 2-37
Translate Scan Code (KYBD_XLT)
.......... 2-38
Real-Time Clock
NMI (RTCALARM_NMI) .. 2-44
Low Battery Check (LOW_BAT _CHK)
....... 2-47
Suspend NMI
(SUSPEND) ................. 2-51
Resume (RESUME) ....................... 2-55
Keyboard Services (B11KYBD) ................ 2-65
Keyboard Interrupt Hex 16 (KYBD_IO) ....... 2-66
Levell Interrupt Hex 9 (KYBD_INT9) ....... 2-68
Video I/O and Print Screen (B 12VIDEO) ......... 2-77
Print Screen Interrupt Hex 05 (PRT_SCRN) .. 2-116
Diskette Support (B13DSKT)
................. 2-119
Diskette
I/O Interrupt Hex 13 (DSKT_IO) .... 2-120
Bootstrap Loader Interrupt Hex 19
(SYS_BOOT) .......................... 2-139
Communications and
Printer BIOS
(B14COMMO)
............................ 2-143
Communications Interrupt Hex
14
(COMMO_IO) ......................... 2-144
Printer Interrupt Hex 17 (PRT_IO) .......... 2-150
Time of Day (B15TOD) ...................... 2-153
Time
of Day Interrupt Hex 1A (TOD_PROC) . 2-154
Timer 0 Interrupt 8 (TMRO_INT8) .......... 2-166
System Services
(B 16SYSV) ................... 2-168
ROM BIOS 2-1