From: Toni Wilen <twilen@winuae.net>
Date: Sun, 26 Nov 2023 12:40:27 +0000 (+0200)
Subject: Do not automatically enable turbo floppy if executable inserted in DF0: does short... 
X-Git-Tag: 5.1.0~38
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=7ece361672f332b158ad52808a55f73792b1ca17;p=francis%2Fwinuae.git

Do not automatically enable turbo floppy if executable inserted in DF0: does short DMA transfers.
---

diff --git a/disk.cpp b/disk.cpp
index 7211f4fc..77678722 100644
--- a/disk.cpp
+++ b/disk.cpp
@@ -4800,6 +4800,7 @@ void DSKLEN (uae_u16 v, int hpos)
 	int prevdatalen = dsklength;
 	int noselected = 0;
 	int motormask;
+	bool weirddma = false;
 
 	DISK_update (hpos);
 
@@ -4820,6 +4821,7 @@ void DSKLEN (uae_u16 v, int hpos)
 		}
 		dskdmaen = DSKDMA_READ;
 		DISK_start ();
+		weirddma = dsklength < 544 * 11 * 2;
 	}
 	if (!(v & 0x8000)) {
 		if (dskdmaen != DSKDMA_OFF) {
@@ -4968,6 +4970,8 @@ void DSKLEN (uae_u16 v, int hpos)
 				continue;
 			if (selected & (1 << dr))
 				continue;
+			if (drv->useturbo && weirddma)
+				continue;
 
 			pos = drv->mfmpos & ~15;
 			drive_fill_bigbuf (drv, 0);