From e6bd0093bdf97c5b6e27315bce278778344350c8 Mon Sep 17 00:00:00 2001
From: TomW <TomW@localhost>
Date: Tue, 25 Aug 2015 19:20:57 +0100
Subject: [PATCH] Masked off drive select.

---
 src/fdc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/fdc.c b/src/fdc.c
index 4f95f0a..7addf7e 100644
--- a/src/fdc.c
+++ b/src/fdc.c
@@ -293,7 +293,7 @@ void fdc_write(uint16_t addr, uint8_t val, void *priv)
         			disctime = 1024 * (1 << TIMER_SHIFT);
         			timer_update_outstanding();
                                 fdc.drive = fdc.params[0] & 3;
-                                disc_drivesel = fdc.drive;
+                                disc_drivesel = fdc.drive & 1;
                                 switch (discint)
                                 {
                                         case 5: /*Write data*/