From af8b0eedcdd3ca94afe94f86e5bcc2a8c3b36805 Mon Sep 17 00:00:00 2001
From: Curt Coder <curtcoder@mail.com>
Date: Mon, 3 Nov 2014 22:52:52 +0200
Subject: [PATCH] (MESS) victor9k: Floppy WIP. (nw)

---
 src/lib/formats/victor9k_dsk.c  |  2 +-
 src/mess/machine/victor9k_fdc.c | 32 ++++++++++++++++++++++++++++++--
 src/mess/machine/victor9k_fdc.h |  4 +++-
 3 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/src/lib/formats/victor9k_dsk.c b/src/lib/formats/victor9k_dsk.c
index 18fef02afea..bbc0b45aac9 100644
--- a/src/lib/formats/victor9k_dsk.c
+++ b/src/lib/formats/victor9k_dsk.c
@@ -87,7 +87,7 @@ const victor9k_format::format victor9k_format::formats[] = {
 
 const UINT32 victor9k_format::cell_size[] =
 {
-	0
+	1789, 1896, 2009, 2130, 2272, 2428, 2613, 2847, 2961
 };
 
 const int victor9k_format::sectors_per_track[2][80] =
diff --git a/src/mess/machine/victor9k_fdc.c b/src/mess/machine/victor9k_fdc.c
index 0cc943a433c..1f8f3d3360e 100644
--- a/src/mess/machine/victor9k_fdc.c
+++ b/src/mess/machine/victor9k_fdc.c
@@ -887,6 +887,8 @@ void victor_9000_fdc_t::live_start()
 	cur_live.shift_reg = 0;
 	cur_live.shift_reg_write = 0;
 	cur_live.bit_counter = 0;
+	cur_live.sync_bit_counter = 0;
+	cur_live.sync_byte_counter = 0;
 
 	cur_live.drive = m_drive;
 	cur_live.side = m_side;
@@ -1007,6 +1009,7 @@ void victor_9000_fdc_t::live_abort()
 	cur_live.brdy = 1;
 	cur_live.lbrdy = 1;
 	cur_live.sync = 1;
+	cur_live.syn = 1;
 	cur_live.gcr_err = 1;
 }
 
@@ -1045,17 +1048,35 @@ void victor_9000_fdc_t::live_run(const attotime &limit)
 				}
 			}
 
+			// sync counter
+			if (sync) {
+				cur_live.sync_bit_counter = 0;
+				cur_live.sync_byte_counter = 10;
+			} else if (!cur_live.sync) {
+				cur_live.sync_bit_counter++;
+				if (cur_live.sync_bit_counter == 10) {
+					cur_live.sync_bit_counter = 0;
+					cur_live.sync_byte_counter++;
+					if (cur_live.sync_byte_counter == 16) {
+						cur_live.sync_byte_counter = 0;
+					}
+				}
+			}
+
+			// syn
+			int syn = !(cur_live.sync_byte_counter == 15);
+
 			// GCR decoder
 			if (cur_live.drw) {
 				cur_live.i = cur_live.drw << 10 | cur_live.shift_reg;
 			} else {
-				cur_live.i = 0x300 | ((cur_live.wd & 0xf0) << 1) | cur_live.wrsync << 4 | (cur_live.wd & 0x0f);
+				cur_live.i = cur_live.drw << 10 | ((cur_live.wd & 0xf0) << 1) | cur_live.wrsync << 4 | (cur_live.wd & 0x0f);
 			}
 
 			cur_live.e = m_gcr_rom->base()[cur_live.i];
 
 			// byte ready
-			int brdy = cur_live.bit_counter == 9;
+			int brdy = !(cur_live.bit_counter == 9);
 
 			// GCR error
 			int gcr_err = !(brdy || BIT(cur_live.e, 3));
@@ -1073,6 +1094,12 @@ void victor_9000_fdc_t::live_run(const attotime &limit)
 				syncpoint = true;
 			}
 
+			if (syn != cur_live.syn) {
+				if (LOG) logerror("%s SYN %u\n", cur_live.tm.as_string(),syn);
+				cur_live.syn = syn;
+				syncpoint = true;
+			}
+
 			if (gcr_err != cur_live.gcr_err) {
 				if (LOG) logerror("%s GCR ERR %u\n", cur_live.tm.as_string(),gcr_err);
 				cur_live.gcr_err = gcr_err;
@@ -1093,6 +1120,7 @@ void victor_9000_fdc_t::live_run(const attotime &limit)
 
 		case RUNNING_SYNCPOINT: {
 			m_lbrdy_cb(cur_live.lbrdy);
+			m_syn_cb(cur_live.syn);
 
 			cur_live.state = RUNNING;
 			checkpoint();
diff --git a/src/mess/machine/victor9k_fdc.h b/src/mess/machine/victor9k_fdc.h
index 3f374437e04..d6eb959b659 100644
--- a/src/mess/machine/victor9k_fdc.h
+++ b/src/mess/machine/victor9k_fdc.h
@@ -125,9 +125,12 @@ private:
 		attotime edge;
 		UINT16 shift_reg;
 		int bit_counter;
+		int sync_bit_counter;
+		int sync_byte_counter;
 		int brdy;
 		int lbrdy;
 		int sync;
+		int syn;
 		int gcr_err;
 
 		// write
@@ -137,7 +140,6 @@ private:
 		int write_position;
 		UINT8 wd;
 		int wrsync;
-		int syn;
 		int gcr_data;
 		int erase;
 	};