38 lines
758 B
ArmAsm
38 lines
758 B
ArmAsm
;;;
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;;;
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;;; isprint-arch.S
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;;;
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;;; Architecture depend isprint function.
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;;;
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;;; @author Takahide Matsutsuka <markn@markn.org>
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;;;
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;;; $Id: isprint_arch.S,v 1.1 2007/09/11 12:12:59 matsutsuka Exp $
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;;;
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.globl _isprint_arch
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.area _GSINIT
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;; unsigned long clock_time();
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;; return long value as (DE, BC)
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;; this function is identify if a given
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;; character is printable on PC-6001
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.area _CODE
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_isprint_arch:
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;; ---------------------------------
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;; char isprint (unsigned char ch);
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;; Stack; retl reth ch
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;; A_____HL____
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;; return l
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;; ---------------------------------
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ld hl, #2
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add hl, sp
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ld a, (hl)
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or a
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jr z, #_isprint_arch_ret_false
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cp #0xfe
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jr nc, #_isprint_arch_ret_false
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ld l, #1
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ret
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_isprint_arch_ret_false:
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ld l, #0
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ret
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