i want load other program asm. write exe program small model. code can find here:
;-------------------macro----------------- newline macro push ax push dx ;print new line mov dl, 10 mov ah, 02h int 21h mov dl, 13 mov ah, 02h int 21h pop dx pop ax endm println macro info push ax push dx mov ah, 09h mov dx, offset info int 21h newline pop dx pop ax endm ; input: ; ax - error code printerrorcode macro add al, '0' mov dl, al mov ah, 06h int 21h newline endm ;-----------------end macro---------------- .model small .stack 100h .data inittorunerrortext db "bad init run other programs. error code: ", '$' runexeerrortext db "error running other program. error code: ", '$' newprogramcmd db 0 folderpath db "c:\files\lab2.exe", 0, '$' segmentaddress dw 0 epbstruct db 16h dup(0) .code main: mov ax, @data mov es, ax mov ds, ax call inittorun call runexe mov ah, 4ch int 21h ; result ; ax = 0 => ; ax != 0 => have error inittorun proc push bx mov ah, 48h mov bx, 05h int 21h jnc inittorunallgood println inittorunerrortext printerrorcode mov ax, 1 jmp inittorunend inittorunallgood: mov segmentaddress, ax mov ax, 0 inittorunend: pop bx ret endp ; result ; ax = 0 => ; ax != 0 => have error runexe proc push bx dx mov ax, segmentaddress mov word ptr epbstruct, ax mov word ptr epbstruct + 02h, offset newprogramcmd mov word ptr epbstruct + 06h, ax mov word ptr epbstruct + 0ah, ax mov ax, 4b00h mov dx, offset folderpath ;temporary, pathtorequredexe mov bx, offset epbstruct int 21h jnc runexeallgood println runexeerrortext printerrorcode mov ax, 1 jmp runexeend runexeallgood: mov ax, 0 runexeend: pop dx bx ret endp end main if run it, have same output:
bad init run other programs. error code:
8
error running other program. error code:
8
if write lower number allocating memory (dos 48h int 21h), first error disappeared. if try free memory dos 4ah int 21h, don't know size should tell it. how can solve problem? p.s. use tasm 16bit dosbox v0.74
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