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SEL_TEST.ASM
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292 lines (232 loc) · 5.13 KB
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;******************************************************************************
; selector operations test
;******************************************************************************
;
;[TAB=8]
;------------------------------------------------------------------------------
%macro PRINT 1
mov edx,%1
mov ah,09h
int 21h
%endmacro
;------------------------------------------------------------------------------
segment text align=4 class=CODE use32
;------------------------------------------------------------------------------
..start:
; delete selector
mov eax, 24h
mov es, eax
call delete_selector
; delete selector
xor eax, eax
mov es, eax
call delete_selector
; create selector
mov ebx, 110h
call create_selector
mov [sel1], eax
; resize_selector
mov eax, ds
mov es, eax
mov ebx, 1000h
call resize_selector
; create selector
mov ebx, 120h
call create_selector
mov [sel2], eax
; create selector
mov ebx, 0
call create_selector
mov [sel3], eax
; set phisical memory
mov es, [sel3]
mov ecx, 80h ; 512KB
mov ebx, 100000h ; address: 1MB-
call mapping_phisical_memory
; set phisical memory
mov ecx, 80h ; 512KB
mov ebx, 210000h ; address: 2MB-
call mapping_phisical_memory
; create selector
mov ebx, 100h
call create_selector
mov [sel4], eax
mov es, eax ; delete
call delete_selector
; delete selector
mov es, [sel2]
call delete_selector
; create selector
mov ebx, 1000h
call create_selector
mov [sel2], eax
; resize_selector
mov es, [sel1]
mov ebx, 200h
call resize_selector
; resize_selector
mov es, [sel3]
mov ebx, 200h
call resize_selector
; delete selector
mov es, [sel3]
call delete_selector
; delete selector
mov es, [sel1]
call delete_selector
; resize_selector
mov eax, cs
mov es, eax
mov ebx, 48h
call resize_selector
; create selector
mov ebx, 1000h
call create_selector
mov [sel2], eax
;-----------------------------------------
; end
;-----------------------------------------
mov ah, 4ch
int 21h
;------------------------------------------------------------------------------
align 16
;------------------------------------------------------------------------------
sel1 dd 0
sel2 dd 0
sel3 dd 0
sel4 dd 0
msg1 db 'Create selector: $'
msg2 db 'Delete selector: $'
msg3 db 'Resize selector: $'
msg4 db 'mapping selector: $'
size db ' size: $'
free db ' free memory: $'
err db ' error!',13,10,'$'
crlf db 13,10,'$'
;------------------------------------------------------------------------------
; create selector
;------------------------------------------------------------------------------
align 16
create_selector:
PRINT msg1
mov ah, 48h
int 21h
jc .error
call print_eax_hex
push eax
PRINT size
mov eax, ebx
shl eax, 12
call print_eax_hex
pop eax
call print_free_memory
ret
.error:
PRINT err
ret
;------------------------------------------------------------------------------
; delete selector
;------------------------------------------------------------------------------
align 16
delete_selector:
PRINT msg2
mov eax, es
lsl ebx, eax
inc ebx
call print_eax_hex
mov ah, 49h
int 21h
jc .error
PRINT size
mov eax, ebx
call print_eax_hex
call print_free_memory
ret
.error:
PRINT err
ret
;------------------------------------------------------------------------------
; resize selector
;------------------------------------------------------------------------------
align 16
resize_selector:
PRINT msg3
mov eax, es
call print_eax_hex
mov ah, 4ah
int 21h
jc .error
PRINT size
mov eax, es
lsl eax, eax
inc eax
call print_eax_hex
call print_free_memory
ret
.error:
PRINT err
ret
;------------------------------------------------------------------------------
; mapping phisical memory
;------------------------------------------------------------------------------
align 16
mapping_phisical_memory:
PRINT msg4
mov eax, es
call print_eax_hex
PRINT size
mov eax, es
lsl eax, eax
inc eax
call print_eax_hex
mov ax, 250ah ; in es, ebx, ecx
int 21h
jc .error
call print_free_memory
ret
.error:
PRINT err
ret
;------------------------------------------------------------------------------
; print max allocate memory
;------------------------------------------------------------------------------
align 16
print_free_memory:
push eax
PRINT free
mov ah, 48h
mov ebx, -1
int 21h
mov eax, ebx
shl eax, 12
call print_eax_hex
PRINT crlf
pop eax
ret
;------------------------------------------------------------------------------
; number to hex digits
;------------------------------------------------------------------------------
; in eax = value
;
align 16
print_eax_hex:
pusha
mov ecx, 8
mov edi, hex
.loop:
rol eax, 4
movzx ebx, al
and bl, 0fh
mov dl, [hex_str + ebx]
cmp byte [edi], '_'
jne .skip
inc edi
.skip:
mov [edi], dl
inc edi
loop .loop
PRINT hex
popa
ret
hex_str db '0123456789abcdef'
hex db '####_####$'