From ab48f63b712d21c6e9ba704791520362d4f198af Mon Sep 17 00:00:00 2001
From: Couriersud <couriersud@users.noreply.github.com>
Date: Mon, 31 May 2010 21:20:06 +0000
Subject: [PATCH] Added "Read and Branch" code to tms5110 and tms6100. No
 possibility to test, though. No whatsnew.

---
 src/emu/machine/tms6100.c | 11 +++++++++++
 src/emu/sound/tms5110.c   | 10 ++++++++++
 2 files changed, 21 insertions(+)

diff --git a/src/emu/machine/tms6100.c b/src/emu/machine/tms6100.c
index 6d1774f4bcd..054cf0ca500 100644
--- a/src/emu/machine/tms6100.c
+++ b/src/emu/machine/tms6100.c
@@ -230,6 +230,17 @@ WRITE_LINE_DEVICE_HANDLER( tms6100_romclock_w )
 			break;
 		case 0x03:
 			/* READ AND BRANCH */
+			if (tms->state & TMS6100_NEXT_READ_IS_DUMMY)
+			{
+				tms->state &= ~TMS6100_NEXT_READ_IS_DUMMY;  // clear - no dummy read according to datasheet
+				LOG(("loaded address latch %08x\n", tms->address_latch));
+				tms->address = tms->rom[tms->address_latch] | (tms->rom[tms->address_latch+1]<<8);
+				tms->address &= 0x3fff; // 14 bits
+				LOG(("loaded indirect address %04x\n", tms->address));
+				tms->address = (tms->address << 3);
+				tms->address_latch = 0;
+				tms->loadptr = 0;
+			}
 			break;
 		}
 	}
diff --git a/src/emu/sound/tms5110.c b/src/emu/sound/tms5110.c
index 3b39aea4c51..4c92870f8c1 100644
--- a/src/emu/sound/tms5110.c
+++ b/src/emu/sound/tms5110.c
@@ -801,6 +801,16 @@ void tms5110_PDC_set(tms5110_state *tms, int data)
 					tms->next_is_address = TRUE;
 					break;
 
+				case TMS5110_CMD_READ_BRANCH:
+					new_int_write(tms, 0,1,1,0);
+					new_int_write(tms, 1,1,1,0);
+					new_int_write(tms, 0,1,1,0);
+					new_int_write(tms, 0,0,0,0);
+					new_int_write(tms, 1,0,0,0);
+					new_int_write(tms, 0,0,0,0);
+					tms->schedule_dummy_read = FALSE;
+					break;
+
 				case TMS5110_CMD_TEST_TALK:
 					tms->state = CTL_STATE_NEXT_OUTPUT;
 					break;