From: Robin Krens <robin@robinkrens.nl>
Date: Sun, 12 Jun 2022 13:39:19 +0000 (+0200)
Subject: snd: init and test of noise sound
X-Git-Url: https://robinkrens.nl/gitweb/?a=commitdiff_plain;h=aac2ecae4a1e4f57510f5bbc7f7b5234f6925d35;p=swan-dev

snd: init and test of noise sound
---

diff --git a/src/main.c b/src/main.c
index 7690c66..5a18283 100644
--- a/src/main.c
+++ b/src/main.c
@@ -7,6 +7,7 @@
  */
 #include <memory.h>
 #include <video.h>
+#include <dma_snd.h>
 #include <config.h>
 #include <interrupt.h>
 
@@ -61,29 +62,13 @@ unsigned char inport(unsigned char portnr)
 	return val;
 }
 
-static void __attribute__((used)) dummy() 
+void setup_audio(void)
 {
-	__asm__("iret");
-}
+	outport(IO_AUDIO_CTRL, AUDIO_4_NOISE | AUDIO_4_ON);
+	outport(IO_AUDIO_NOISE_CTRL, NOISE_RESET | NOISE_ENABLE | 0x2);
+	outport(IO_AUDIO4_VOL, 0x22);
 
-//__attribute__((naked)) void dummy_isr(void)
-//{
-//	__asm__("push %ax\n\t"
-//		"push %bx\n\t"
-//		"popw %bp\n\t" /* HACK: directly pop bp again */
-//	       );
-//
-//	//unsigned char val = inport(IO_BG_X);
-//	//val++;
-//
-//	//outport(IO_BG_X, val);
-//	//outport(IO_INT_ACK, INT_VBLANK_START);
-//	__asm__("pop %ax\n\t"
-//		"pop %bx\n\t"
-//	       );
-//
-//	__asm__("iret");
-//}
+}
 
 void setup_ivec(void)
 {
@@ -143,6 +128,7 @@ int main(void)
 
 	setup_ivec();
 	init_video();
+	setup_audio();
 	outport(IO_VIDEO_MODE, VMODE_16C_CHK | VMODE_CLEANINIT);
 	unsigned short base = 0x3000; /* screens pos */
 	unsigned short sprite_pos = base - (MAP_SIZE*2) - SPR_TABLE_SIZE;