start32.asm

Really great code and info for 32-bit protected mode .ASM programming

; 386 Protected mode control program header.
; By Tran.
; Feel free to use this code in your own programs.

        .386p

LOWMIN  equ     0               ; minimum low memory needed to run (in K)
EXTMIN  equ     0               ; minimum extended memory needed to run (in K)
TSTAK   equ     400h            ; total stack size (in bytes)
ISTAK   equ     80h             ; hardware IRQ safe stack size (in bytes)

desc    struc
lml     dw      0
bsl     dw      0
bsm     db      0
acc     db      0
lmh     db      0
bsh     db      0
desc    ends

task    struc
back            dd      0
esp0            dd      0
sp0             dd      10h
esp1            dd      0
sp1             dd      0
esp2            dd      0
sp2             dd      0
ocr3            dd      0
oeip            dd      0
oeflags         dd      0
oeax            dd      0
oecx            dd      0
oedx            dd      0
oebx            dd      0
oesp            dd      0
oebp            dd      0
oesi            dd      0
oedi            dd      0
oes             dd      0
ocs             dd      0
oss             dd      0
ods             dd      0
ofs             dd      0
ogs             dd      0
oldtr           dd      0
iomap           dd      104 shl 16
task    ends

code16  segment para stack use16 'stack'
code16  ends
code32  segment para public use32
code32  ends
codeend segment para public use32
codeend ends


code16  segment para stack use16 'stack'
        assume cs:code16, ds:code16, ss:code16
        org 0

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