IBM 770 manual Calling Convention Pseudo Code, B-10

Calling Convention Pseudo Code

The following describes the calling convention using pseudo code.

Assembler Language
InputParm	SMB_INPARM	< >
OutputParm	SMB_OUTPARM	< >
16-bit
push	ds
mov	ax, offset OutputParm
push	ax
push	ds
mov	ax, offset InputParm
push	ax
call	dword ptr SmapiBios
add	sp, 8
32-bit
push	ds
mov	eax, offset OutputParm
push	eax
push	ds
mov	eax, offset InputParm
push	eax
call	fword ptr SmapiBios
add	sp, 16

C Language

typedef WORD (far \ SMB)(FPINPARM, FPOUTPARM) ;

SMB	SmapiBios ;
INPARM	InputParm ;
OUTPARM	OutputParm ;
WORD	RC ;

RC = SmapiBios(&InputParm, &OutputParm) ;

B-10 SMAPI BIOS