25 lines
540 B
ArmAsm
25 lines
540 B
ArmAsm
// #LAYOUT# STD * #TAKE
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// #LAYOUT# X16 * #IGNORE
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// #LAYOUT# * KERNAL_0 #TAKE
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// #LAYOUT# * * #IGNORE
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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 295
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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]): .A
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//
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SCREEN:
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// There are only 2 sane ways to implement this routine,
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// I hope this one is different than what Commodore picked :)
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ldy #25 // 25 columns
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ldx #40 // 40 rows
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rts
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