42 lines
866 B
ArmAsm
42 lines
866 B
ArmAsm
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;; #IMPORT# KERNAL_0 = KERNAL_0_combined.sym
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;; #IMPORT# KERNAL_C = KERNAL_C_combined.sym
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;
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; Definitions for calling MEGA65 segment KERNAL_0 routines from ZVM_1
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;
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;; #ALIAS# CHROUT = KERNAL_C.proxy_Z1_CHROUT
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;; #ALIAS# return_from_interrupt = KERNAL_0.return_from_interrupt
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; 'Print immediate', original implementation by Mike Barry, adapted to 65CE02, modified to preserve .Y
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; see http://www.6502.org/source/io/primm.htm
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PRIMM:
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pla ; get low part of (string address-1)
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sta PTR1
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pla ; get high part of (string address-1)
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sta PTR2
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phy
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+bra @2
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@1:
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jsr CHROUT ; output a string char
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@2:
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inc PTR1 ; advance the string pointer
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bne @3
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inc PTR2
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@3:
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ldy #$00
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lda (PTR1), y ; get string char
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bne @1 ; output and continue if not NUL
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ply
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lda PTR2
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pha
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lda PTR1
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pha
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rts
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