From 5b307e421c1563ffd301dc39b7af6d20ee247827 Mon Sep 17 00:00:00 2001
From: qwertymodo <qwertymodo@qwertymodo.com>
Date: Sat, 21 Sep 2019 15:21:50 -0700
Subject: [PATCH] Add new N-SPC commands FA (mute) and FB (unmute)

---
 music.asm | 19 +++++++++++++++++++
 spc.asm   | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 spc.asm

diff --git a/music.asm b/music.asm
index 5a53a6c..1bf8203 100644
--- a/music.asm
+++ b/music.asm
@@ -250,3 +250,22 @@ PsychoSolder_MusicCheck:
     .done
 RTL
 ;--------------------------------------------------------------------------------
+
+;--------------------------------------------------------------------------------
+!SPCFreeSpace = $0700
+
+SPCEngineNewCode:
+dw .end-.start
+dw !SPCFreeSpace
+.start
+incsrc spc.asm
+.end
+
+dw $0004
+dw $0A73            ; $0A73: CMP A,#$F0
+db $5F              ; JMP SPCFreeSpace
+dw !SPCFreeSpace
+db $00              ; NOP
+
+dw $0000, $0000
+;--------------------------------------------------------------------------------
\ No newline at end of file
diff --git a/spc.asm b/spc.asm
new file mode 100644
index 0000000..64ab872
--- /dev/null
+++ b/spc.asm
@@ -0,0 +1,41 @@
+;=======================================
+; SPC engine changes
+;
+; Free space at $040F-07FF (probably)
+;
+; If we ever switch to ASAR we can rewrite
+; this as actual SPC asm instead of this
+; db jank.
+
+; seek($0700)
+db $68, $F0         ; CMP A,#$F0            ; the thing we overwrote
+db $D0, $03         ; BNE +
+db $5F, $81, $0A    ;   JMP SilenceSong     ; ($0A81)
+db $68, $FA         ; + : CMP A,#$FA        ; new mute command $FA
+db $D0, $21         ; BNE +
+db $E8, $00         ;   MOV A,#$00
+db $C5, $4A, $0A    ;   MOV $0A4A,A         ; $0A49: MOV A,#$70 -> MOV A,#$00
+db $C5, $F3, $0A    ;   MOV $0AF3,A         ; $0AF2: MOV $059,#$C0 -> MOV $059,#$00
+db $C5, $32, $0C    ;   MOV $0C32,A         ; $0C32: MOVW $058,YA -> NOP #2
+db $C5, $33, $0C    ;   MOV $0C33,A
+db $E8, $C4         ;   MOV A,#$C4          ; $0D19: MOVW $058,YA -> MOV $058,A
+db $C5, $19, $0D    ;   MOV $0D19,A
+db $E8, $58         ;   MOV A,#$58
+db $C5, $1A, $0D    ;   MOV $0D1A,A
+db $3F, $81, $0A    ; - : CALL SilenceSong  ; ($0A81)
+db $FA, $00, $04    ;   MOV $04, $00
+db $5F, $00, $0B    ;   JMP No_New_Song     ; ($0B00)
+db $68, $FB         ; + : CMP A,#$FB        ; new unmute command $FB
+db $F0, $03         ; BEQ +
+db $5F, $9D, $0A    ;   JMP NewSongInput    ; ($0A9D)
+db $E8, $70         ; + : MOV A,#$70
+db $C5, $4A, $0A    ; MOV $0A4A,A           ; $0A49: MOV A,#$70
+db $E8, $C0         ; MOV A,#$C0
+db $C5, $F3, $0A    ; MOV $0AF3,A           ; $0AF2: MOV $059,#$C0
+db $E8, $DA         ; MOV A,#$DA
+db $C5, $32, $0C    ; MOV $0C32,A           ; $0C32: MOVW $058,YA
+db $C5, $19, $0D    ; MOV $0D19,A           ; $0D19: MOVW $058,YA
+db $E8, $58         ; MOV A,#$58
+db $C5, $33, $0C    ; MOV $0C33,A
+db $C5, $1A, $0D    ; MOV $0D1A,A
+db $2F, $D4         ; BRA -
\ No newline at end of file