Fixed bugs; and, improved the efficiency of some pce library functions.

2015-11-26 15:06:20 -05:00
parent 959eff34a3
commit 39694d0aaa
16 changed files with 158 additions and 229 deletions
--- a/libsrc/pce/psg.s
+++ b/libsrc/pce/psg.s
@@ -4,8 +4,8 @@

        .segment        "ONCE"
 psg_init:
-        clx
        stz     PSG_GLOBAL_PAN          ; Silence global balance
+        ldx     #6 - 1

 psg_clear_loop:
        stx     PSG_CHAN_SELECT         ; Select channel
@@ -17,14 +17,12 @@ psg_clear_loop:
        stz     PSG_LFO_FREQ            ; Clear LFO frequency
        stz     PSG_LFO_CTRL            ; Clear LFO control

-        cly
+        ldy     #$20
 psg_clear_waveform:
        stz     PSG_CHAN_DATA           ; Clear waveform byte
-        iny
-        cpy     #$20
+        dey
        bne     psg_clear_waveform

-        inx
-        cpx     #$06
-        bne     psg_clear_loop
+        dex
+        bpl     psg_clear_loop
        rts