covox on right port LPT2 0x278

xrip · Dec 13, 2023 · 57cca77 · 57cca77
1 parent ade200d
commit 57cca77
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Showing 4 changed files with 8 additions and 7 deletions.
diff --git a/assets/rom.h b/assets/rom.h
@@ -60,7 +60,7 @@ INFLASH_ALIGNED BIOS[8192] = {
   0xee, 0xb8, 0x1e, 0x00, 0xa3, 0x1a, 0x00, 0xa3, 0x1c, 0x00, 0xa3, 0x80,
   0x00, 0x04, 0x20, 0xa3, 0x82, 0x00, 0xb8, 0x14, 0x14, 0xa3, 0x78, 0x00,
   0xa3, 0x7a, 0x00, 0xb8, 0x01, 0x01, 0xa3, 0x7c, 0x00, 0xa3, 0x7e, 0x00,
-  0xc7, 0x06, 0x08, 0x00, 0x78, 0x03, 0xc7, 0x06, 0x0a, 0x00, 0xbc, 0x03,
+  0xc7, 0x06, 0x08, 0x00, 0x78, 0x03, 0xc7, 0x06, 0x0a, 0x00, 0x78, 0x02,
   0xc6, 0x06, 0x11, 0x00, 0x80, 0x33, 0xff, 0xba, 0xfb, 0x03, 0xb0, 0x1a,
   0xee, 0xb0, 0xff, 0xe6, 0xc0, 0xec, 0x3c, 0x1a, 0x75, 0x06, 0xc7, 0x05,
   0xf8, 0x03, 0x47, 0x47, 0xba, 0xfb, 0x02, 0xb0, 0x1a, 0xee, 0xb0, 0xff,
@@ -699,7 +699,7 @@ INFLASH_ALIGNED BIOS[8192] = {
   0xb4, 0x00, 0xb0, 0x0d, 0xcd, 0x17, 0x5a, 0xc3, 0x56, 0x32, 0x30, 0x20,
   0x43, 0x50, 0x55, 0x20, 0x28, 0x00, 0x38, 0x30, 0x38, 0x37, 0x20, 0x46,
   0x50, 0x55, 0x29, 0x00, 0xea, 0x5b, 0xe0, 0x00, 0xf0, 0x31, 0x32, 0x2f,
-  0x31, 0x32, 0x2f, 0x32, 0x33, 0x00, 0xff, 0x14
+  0x31, 0x32, 0x2f, 0x32, 0x33, 0x00, 0xff, 0x59
 };
 
 INFLASH_ALIGNED BASICL[16384] = {

diff --git a/bios/pcxtbios.asm b/bios/pcxtbios.asm
@@ -760,7 +760,7 @@ endif
 ;	ror	al, cl				;   divide by eight
 
     mov	[08h], 0x378        ; dss
-    mov	[0Ah], 0x3BC        ; covox
+    mov	[0Ah], 0x278        ; covox
 	mov	[ds:11h], 10000000b	 ;   save in equipment flag with one printer
 
 	xor	di, di				; COM port(s) at 40:00 (hex)

diff --git a/drivers/vga-nextgen/vga.c b/drivers/vga-nextgen/vga.c
@@ -99,7 +99,7 @@ void __not_in_flash_func(sound_callback)(repeating_timer_t *rt) {
     out += getBlasterSample();
 #endif
 #if DSS
-    if (sound_cycles_per_vga >= 50) { // about 7-8kHz, TODO: divide by 4.5
+    if (sound_cycles_per_vga >= 70) { // about 7-8kHz, TODO: divide by 4.5
         last_dss_sample = dss_sample();
         sound_cycles_per_vga = 0;
     }

diff --git a/src/ports.c b/src/ports.c
@@ -149,13 +149,14 @@ void portout(uint16_t portnum, uint16_t value) {
             break;
 #endif
 #if DSS
+        case 0x278: // covox data port
+            true_covox = value;
+        break;
         case 0x378: // ssData
         case 0x37A: // ssControl
             dss_out(portnum, value);
             break;
-        case 0x3BC: // covox data port
-            true_covox = value;
-            break;
+
 #endif
 #if SOUND_BLASTER || ADLIB
         case 0x388: // adlib