From 7ac63b89ec1d45ceaf574f94462d392f65f206fe Mon Sep 17 00:00:00 2001
From: cracyc <cracyc@users.noreply.github.com>
Date: Wed, 30 Sep 2015 21:31:39 -0500
Subject: [PATCH] i8271: slight improvement for the bbc (nw)

---
 src/devices/machine/i8271.c | 4 +++-
 src/devices/machine/i8271.h | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/devices/machine/i8271.c b/src/devices/machine/i8271.c
index 58188b2e156..6e938162ada 100644
--- a/src/devices/machine/i8271.c
+++ b/src/devices/machine/i8271.c
@@ -98,6 +98,7 @@ void i8271_device::soft_reset()
 	rr = 0;
 	scan_sec = 0;
 	moder = 0xc0;
+	oport = 0;
 	scan_cnt[0] = scan_cnt[1] = 0;
 }
 
@@ -823,7 +824,7 @@ void i8271_device::start_command(int cmd)
 			break;
 		}
 		case 0x23:
-			rr = (command[0] << 1) & 0xc0;
+			rr = (command[0] & 0xc0) | oport;
 			break;
 		default:
 			rr = 0;
@@ -863,6 +864,7 @@ void i8271_device::start_command(int cmd)
 		case 0x22:
 			break;
 		case 0x23: {
+			oport = command[2] & ~0xc0;
 			floppy_info &fi = flopi[BIT(command[0], 7)];
 			fi.dev->dir_w(BIT(command[2], 2));
 			fi.dev->stp_w(BIT(command[2], 1));
diff --git a/src/devices/machine/i8271.h b/src/devices/machine/i8271.h
index 4a6fdab7ff8..d3400e95adf 100644
--- a/src/devices/machine/i8271.h
+++ b/src/devices/machine/i8271.h
@@ -209,7 +209,7 @@ private:
 	floppy_info flopi[2];
 
 	int command_pos, sectors_read, scan_len;
-	UINT8 command[6], dma_data;
+	UINT8 command[6], dma_data, oport;
 	UINT8 rr, scan_sec, moder;
 	UINT8 precomp, perpmode, scan_cnt[2];
 	UINT8 srate, hset, icnt, hload;