C64 Random

2026-05-21 06:39:40 +02:00 · 2023-05-05 14:13:07 +02:00
parent 9b34ac0e43
commit b13b53602b
4 changed files with 18 additions and 67 deletions
@@ -210,4 +210,15 @@ upstartEnd
    eif

    sta $d018
-.end
+.end
+
+//
+// Once this is done, random values appear in location $D41B (RANDOM)
+//
+.macro InitializeSIDrnd
+	LDA #$FF  ; maximum frequency value
+	STA $D40E ; voice 3 frequency low byte
+	STA $D40F ; voice 3 frequency high byte
+	LDA #$80  ; noise waveform, gate bit off
+	STA $D412 ; voice 3 control register
+.endm