From 603ebf6ac79ba9c4f63a908aaf663195c13391fc Mon Sep 17 00:00:00 2001
From: Ryan Holtz <rholtz@batcountryentertainment.com>
Date: Mon, 23 Nov 2009 23:29:56 +0000
Subject: [PATCH] (from MESS) Added support for SCSI command 0x2a (Write w/
 32-bit LBA), upped input buffer size in WD33C93 controller [Harmony]

---
 src/emu/machine/scsihd.c  | 1 +
 src/emu/machine/wd33c93.c | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/emu/machine/scsihd.c b/src/emu/machine/scsihd.c
index fc6f38638e9..dc69147bc4e 100644
--- a/src/emu/machine/scsihd.c
+++ b/src/emu/machine/scsihd.c
@@ -222,6 +222,7 @@ static void scsihd_write_data( SCSIInstance *scsiInstance, UINT8 *data, int data
 	switch ( command[0] )
 	{
 		case 0x0a: // WRITE(6)
+		case 0x2a: // WRITE(10)
 			if ((our_this->disk) && (our_this->blocks))
 			{
 				while (dataLength > 0)
diff --git a/src/emu/machine/wd33c93.c b/src/emu/machine/wd33c93.c
index ef570b22ef6..fbf845db0d9 100644
--- a/src/emu/machine/wd33c93.c
+++ b/src/emu/machine/wd33c93.c
@@ -172,7 +172,7 @@ static const struct WD33C93interface *intf;
 typedef void (*cmd_handler)(running_machine *machine);
 #define CMD_HANDLER(name) void name(running_machine *machine)
 
-#define TEMP_INPUT_LEN	65536
+#define TEMP_INPUT_LEN	262144
 #define FIFO_SIZE		12
 
 /* internal controller data definition */
@@ -815,7 +815,7 @@ void wd33c93_exit( const struct WD33C93interface *interface )
 
 void wd33c93_get_dma_data( int bytes, UINT8 *pData )
 {
-	int		len = bytes;
+	int	len = bytes;
 
 	if ( len >= wd33c93_get_xfer_count() )
 		len = wd33c93_get_xfer_count();
@@ -829,6 +829,8 @@ void wd33c93_get_dma_data( int bytes, UINT8 *pData )
 		len = TEMP_INPUT_LEN - len;
 	}
 
+	assert(len);
+
 	memcpy( pData, &scsi_data.temp_input[scsi_data.temp_input_pos], len );
 
 	scsi_data.temp_input_pos += len;