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Power-Programmierung
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obytehi.asm
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Assembly Source File
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1989-05-01
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1KB
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63 lines
; FILENAME: OBYTEHI.ASM
; Copyright (c) 1988, 1989 by Borland International, Inc.
;
; Description: This module implements the routine ByteHigh. ByteHigh
; processes the current high byte value in al.
; This module uses MASM mode syntax and standard segment directives.
;
; ASSEMBLY INSTRUCTIONS: To assemble this module use the following
; TASM command line.
;
; TASM obytehi
include globals.inc
_TEXT segment
ByteHigh proc
; This procedure processes a high byte character
; (ASCII value > 127) in al.
;
; Input
; al - high byte character
; EOL - defined to be the end of line character
; InpSta - input status
; INP_EOL - designates an end-of-line condition
; Options - the options being used
; STR_HIB - designates high byte to be stripped
; Output
; al - high byte processed
; cx - byte count incremented
; Registers modified
; ax, cx
; Process high byte
;--- end of line
cmp al, EOL ;check if end of line
jne bythi1
or InpSta, INP_EOL
ret
;--- remove high bytes
bythi1:
test Options, STR_HIB ;test if remove high bytes
jz bythi2
ret
;--- write byte
bythi2:
stosb
inc cx
ret
ByteHigh endp
_TEXT ends
end