git.y1.nz

commit 96aa69d11f480fcc8ba0861404e683c813392552
parent eb52910c7f73f7b0bcd3ceb285ae2b4ea23896aa
Author: Toxa <untoxa@mail.ru>
Date:   Mon, 10 Jan 2022 14:40:01 +0300

PSG register masks

Diffstat:
M
gbdk-lib/include/sms/hardware.h
12
++++++++++++

1 file changed, 12 insertions(+), 0 deletions(-)
diff --git a/gbdk-lib/include/sms/hardware.h b/gbdk-lib/include/sms/hardware.h
@@ -31,7 +31,19 @@ static volatile SFR AT(0x3F) JOY_CTL;
 #define JOY_P2_LATCH   0b00001000
 
 static volatile SFR AT(0x7E) VCOUNTER;
+
 static volatile SFR AT(0x7F) PSG;
+
+#define PSGLatch       0x80
+#define PSGData        0x40
+
+#define PSGChannel0    0b00000000
+#define PSGChannel1    0b00100000
+#define PSGChannel2    0b01000000
+#define PSGChannel3    0b01100000
+
+#define PSGVolumeData  0b00010000
+
 static volatile SFR AT(0x7F) HCOUNTER;
 
 static volatile SFR AT(0xBE) VDP_DATA;

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