From 29825789a8c177387dbcf0c7fd0d2fb55b987e40 Mon Sep 17 00:00:00 2001
From: MetalliC <0vetal0@gmail.com>
Date: Thu, 30 Nov 2017 12:51:59 +0200
Subject: [PATCH] ymz774: assume each sequencer have its own current bank (nw)

---
 src/devices/sound/ymz770.cpp | 10 ++++++++++
 src/devices/sound/ymz770.h   |  1 +
 2 files changed, 11 insertions(+)

diff --git a/src/devices/sound/ymz770.cpp b/src/devices/sound/ymz770.cpp
index 86f2710f2fa..6ed28a4bf01 100644
--- a/src/devices/sound/ymz770.cpp
+++ b/src/devices/sound/ymz770.cpp
@@ -107,6 +107,7 @@ void ymz770_device::device_start()
 		save_item(NAME(m_sequences[ch].timer), ch);
 		save_item(NAME(m_sequences[ch].stopchan), ch);
 		save_item(NAME(m_sequences[ch].loop), ch);
+		save_item(NAME(m_sequences[ch].bank), ch);
 		save_item(NAME(m_sequences[ch].is_playing), ch);
 	}
 }
@@ -140,6 +141,7 @@ void ymz770_device::device_reset()
 		sequence.timer = 0;
 		sequence.stopchan = 0;
 		sequence.loop = 0;
+		sequence.bank = 0;
 		sequence.is_playing = false;
 	}
 }
@@ -626,7 +628,13 @@ void ymz774_device::sequencer()
 				case 0xfe: // timer delay
 					sequence.delay = sequence.timer * 32; // possible needed -1 or +(32-1)
 					break;
+				case 0xf0:
+					sequence.bank = data & 1;
+					break;
 				default:
+				{
+					uint8_t temp = m_bank;
+					m_bank = sequence.bank;
 					if (m_bank == 0 && reg >= 0x60 && reg < 0xb0) // if we hit SEQ registers need to add this sequence offset
 					{
 						int sqn = i;
@@ -636,6 +644,8 @@ void ymz774_device::sequencer()
 					}
 					else
 						internal_reg_write(reg, data);
+					m_bank = temp;
+				}
 					break;
 				}
 			}
diff --git a/src/devices/sound/ymz770.h b/src/devices/sound/ymz770.h
index 0393b5f706e..b640d780ef5 100644
--- a/src/devices/sound/ymz770.h
+++ b/src/devices/sound/ymz770.h
@@ -101,6 +101,7 @@ protected:
 		uint16_t stopchan;
 		uint8_t loop;
 		uint8_t *data;
+		uint8_t bank;
 		bool is_playing;
 	};