From 3ef0b1dc95b49704076887ce1328a64924ceaa3d Mon Sep 17 00:00:00 2001
From: Alex <alexkorochinskiy@gmail.com>
Date: Tue, 15 Sep 2026 15:34:25 +0300
Subject: [PATCH] Fix OPL4 abort completion

---
 DiskRef/WC/VGMPLAY.WMF     | Bin 98816 -> 98816 bytes
 VGMPLAY.WMF                | Bin 98816 -> 98816 bytes
 src_sdcc/asm/cmdblocks.asm |   8 ++++++--
 src_sdcc/inc/vgm.h         |   3 ++-
 src_sdcc/main.c            |   8 ++++++--
 5 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/DiskRef/WC/VGMPLAY.WMF b/DiskRef/WC/VGMPLAY.WMF
index 6f253eba5dc2bb5c108ab28498c71a745dd41d01..a0e1a30d9f497c880c814ef16c45c61f20968839 100644
GIT binary patch
delta 4584
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delta 4609
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diff --git a/VGMPLAY.WMF b/VGMPLAY.WMF
index 6f253eba5dc2bb5c108ab28498c71a745dd41d01..a0e1a30d9f497c880c814ef16c45c61f20968839 100644
GIT binary patch
delta 4584
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diff --git a/src_sdcc/asm/cmdblocks.asm b/src_sdcc/asm/cmdblocks.asm
index f620cfd..8b18270 100644
--- a/src_sdcc/asm/cmdblocks.asm
+++ b/src_sdcc/asm/cmdblocks.asm
@@ -110,7 +110,8 @@ ptr_table:
         dw blk_saa_init            ; 11 = CMDBLK_SAA_INIT
         dw blk_saa2_init           ; 12 = CMDBLK_SAA2_INIT
         dw blk_init_opl4           ; 13 = CMDBLK_INIT_OPL4
-        dw blk_silence_wave        ; 14 = CMDBLK_SILENCE_WAVE
+        dw blk_silence_wave_off    ; 14 = CMDBLK_SILENCE_WAVE_OFF
+        dw blk_silence_wave_tl     ; 15 = CMDBLK_SILENCE_WAVE_TL
 
 ; ═══════════════════════════════════════════════════════════════════════
 ; CMDBLK_INIT_OPL3 — OPL3 init (NEW=1, clean state)
@@ -292,7 +293,7 @@ blk_silence_opl:
 ;             D0 02 50 FF ... D0 02 67 FF (TL max, 24 канала)
 ;             66
 ; ═══════════════════════════════════════════════════════════════════════
-blk_silence_wave:
+blk_silence_wave_off:
         opl4_wave_write #68, #40
         opl4_wave_write #69, #40
         opl4_wave_write #6A, #40
@@ -317,6 +318,9 @@ blk_silence_wave:
         opl4_wave_write #7D, #40
         opl4_wave_write #7E, #40
         opl4_wave_write #7F, #40
+        blk_end
+
+blk_silence_wave_tl:
         opl4_wave_write #50, #FF
         opl4_wave_write #51, #FF
         opl4_wave_write #52, #FF
diff --git a/src_sdcc/inc/vgm.h b/src_sdcc/inc/vgm.h
index 8943782..94ded75 100644
--- a/src_sdcc/inc/vgm.h
+++ b/src_sdcc/inc/vgm.h
@@ -286,7 +286,8 @@ const char *vgm_chip_name(uint8_t id);
 #define CMDBLK_SAA_INIT     11  /* SAA1099 chip 1: Sound Enable ON     */
 #define CMDBLK_SAA2_INIT    12  /* SAA1099 chip 2: Sound Enable ON+clk */
 #define CMDBLK_INIT_OPL4    13  /* OPL4 init: NEW=1 + NEW2=1 (wave unlock) */
-#define CMDBLK_SILENCE_WAVE 14  /* OPL4 wave-часть silence: 24 канала KeyOff+Damp+TL max */
+#define CMDBLK_SILENCE_WAVE_OFF 14 /* OPL4 wave: 24x KeyOff+Damp */
+#define CMDBLK_SILENCE_WAVE_TL  15 /* OPL4 wave: 24x TL max */
 
 /* ─── Очередь высокоуровневых команд (HL queue) ───────────────── */
 
diff --git a/src_sdcc/main.c b/src_sdcc/main.c
index a647348..0e7c044 100644
--- a/src_sdcc/main.c
+++ b/src_sdcc/main.c
@@ -156,8 +156,12 @@ static void hl_push(uint8_t cmd, uint8_t param)
 static void hl_push_opl_silence(void)
 {
     hl_push(HLCMD_CMDBLK, CMDBLK_SILENCE_OPL);
-    if (vgm_chip_type == VGM_CHIP_OPL4)
-        hl_push(HLCMD_CMDBLK, CMDBLK_SILENCE_WAVE);
+    if (vgm_chip_type == VGM_CHIP_OPL4) {
+        /* Два блока по 24 записи: вместе с OPL silence они не помещаются
+         * в один ISR-буфер, а cmdblock нельзя продолжать с середины. */
+        hl_push(HLCMD_CMDBLK, CMDBLK_SILENCE_WAVE_OFF);
+        hl_push(HLCMD_CMDBLK, CMDBLK_SILENCE_WAVE_TL);
+    }
 }
 
 /* ── Построение очереди воспроизведения по обнаруженным чипам / loop info ─ */