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-
- ; 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