27 lines
438 B
ArmAsm
27 lines
438 B
ArmAsm
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//
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// Official Kernal routine, described in:
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//
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// - [RG64] C64 Programmer's Reference Guide - page 290
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// - [CM64] Compute's Mapping the Commodore 64 - page 215
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//
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// CPU registers that has to be preserved (see [RG64]): none
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//
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PLOT:
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bcs plot_get
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plot_set:
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sty current_screen_y
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stx current_screen_x
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// XXX handle cursor blink
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// FALLTROUGH to save one byte on RTS
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plot_get:
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ldy current_screen_y
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ldx current_screen_x
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rts
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