home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload
/
ShartewareOverload.cdr
/
progm
/
assemutl.zip
/
PARTBIOS.LIS
< prev
next >
Wrap
File List
|
1985-05-15
|
3KB
|
80 lines
page ,132
;--------------------------
; This text is a partial listing of BIOS low memory
; see tech ref.
; Malcolm McCorquodale
;--------------------------
data segment at 40h
rs232_base dw 4 dup(?) ;addr of rs232 adapters.
printer_base dw 4 dup(?) ;addr of printers
equip_flag dw ? ;installed hardware
mfg_test db ? ;initialization flag
memory_size dw ? ;memory size in k bytes
io_ram_size dw ? ;memory in I/O channel
;--------------------------
; keyboard data areas
;--------------------------
kb_flag db ?
;---------- shift flag equates w/i kb_flag
ins_state equ 80h ;insert state is active
caps_state equ 40h ;caps lock state has been toggled
num_state equ 20h ;num lock state has been toggled
scroll_state equ 10h ;scroll lock state has been toggled
alt_shift equ 08h ;alt shift key depressed
ctl_shift equ 04h ;ctl shift key depressed
left_shift equ 02h ;left shift key depressed
right_shift equ 01h ;right shift key depressed
kb_flag_1 db ?
ins_shift equ 80h ;insert state is depressed
caps_shift equ 40h ;caps lock state is depressed
num_shift equ 20h ;num lock state is depressed
scroll_shift equ 10h ;scroll lock state is depressed
hold_state equ 08h ;suspend key has been toggled
alt_input db ? ;storage for alternate keypad entry
buffer_head dw ? ;ptr to head of keyboard buffer
buffer_tail dw ? ;pointer to tail of keyboard buffer
kb_buffer dw 16 dup(?) ; room for 15 entries
kb_buffer_end label word
;---------------------------------
; diskette data areas w/o equates
;---------------------------------
seek_status db ?
motor_status db ?
motor_count db ?
diskette_status db ?
nec_status db 7 dup(?)
;----------------------------------
; video display data area
;----------------------------------
crt_mode db ? ;current crt mode
crt_cols dw ? ;number of columns on screen
crt_len dw ? ;length of regen in bytes
crt_start dw ? ;starting address in regen buffer
cursor_posn dw 8 dup(?) ;cursor for each of up to 8 pages
cursor_mode dw ? ;current cursor mode setting
active_page db ? ;current page being displayed
addr_6845 dw ? ;base address for active display card
crt_mode_set db ? ;current setting of the 3x8 register
crt_pallette db ? ;current pallette setting color card
data ends
;--------------------------------
; video diplay buffer
;--------------------------------
video_ram segment at 0b800h
regen label byte
regenw label word
video_ram ends
;--------------------------------
; Stack segment
;--------------------------------
stack segment stack 'stack'
stk db 32 dup (?)
stack ends