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47 lines
891 B
ArmAsm
47 lines
891 B
ArmAsm
;
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; Ullrich von Bassewitz, 06.08.1998
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; Christian Krueger, 11-Mar-2017, added 65SC02 optimization
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;
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; CC65 runtime: or on longs
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;
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.export tosor0ax, tosoreax
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.import addysp1
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.importzp c_sp, sreg, tmp1
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tosor0ax:
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.if .cap(CPU_HAS_STZ)
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stz sreg
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stz sreg+1
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.else
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ldy #$00
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sty sreg
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sty sreg+1
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.endif
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tosoreax:
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.if .cap(CPU_HAS_ZPIND)
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ora (c_sp)
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ldy #1
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.else
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ldy #0
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ora (c_sp),y ; byte 0
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iny
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.endif
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sta tmp1
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txa
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ora (c_sp),y ; byte 1
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tax
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iny
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lda sreg
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ora (c_sp),y ; byte 2
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sta sreg
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iny
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lda sreg+1
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ora (c_sp),y ; byte 3
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sta sreg+1
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lda tmp1
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jmp addysp1
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