BYTE Examples

BYTE Examples

Example 1:

*
.Print the screen on the default printer.
.
	BYTE	0xCD,0x5	INT 5 ; MS-DOS Print Screen

Example 2:

*
.Determine total configured memory in bytes.
.
TEMP	INTEGER	2
MEMORY	FORM	6
	BYTE	0x3E,0x8D,0x3E,TEMP+1:
		0xCD,0x12:
		0x3E,0x89,0x5
	MULT	"1024",TEMP,MEMORY

Load Effective Address of TEMP's data area (TEMP+1) into DS:DI.
INT 12 returns number of 1k blocks of configured memory in AX (in INTEGER format).
MOVe the integer value returned in AX to TEMP (pointed to by DS:DI).
MULTiply TEMP by "1024" placing the result in MEMORY.

Example 3:

*
.Turn on the NUM Lock on a PC.
.
	BYTE	0x1E	PUSH DS
	BYTE	0xB8,0x40,0x0	MOV AX,40H
	BYTE	0x8E,0xD8	MOV DS,AX
	BYTE	0x80,0xE,0x17,0x0,0x20
.			OR DS:Byte Ptr[17h],20h
	BYTE	0x1F	POP DS

Save the contents of the DS register.
Move 40h into AX register.
Move the contents of the AX register to the DS register.
Bitwise ORs the value of 20H into the value located at DS:[17h].
Restores the contents of the DS register.

PL/B Language Reference

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