From 7307d60063ee4303da4de45f9d984fdc8df92146 Mon Sep 17 00:00:00 2001 From: "Kenneth J. Davis" Date: Mon, 22 Oct 2012 19:20:18 +0100 Subject: memdisk: Fix order of sectors/track and bytes/sector Swap order of sectors/track with bytes/sector to match diskette parameter table order (as pointed to by INT 1Eh). References: (additional ones available if necessary) 'System BIOS for IBM PC/XT/AT computers and compatibles' by Phoenix Technologies Ltd. copyright 1987,88,89 3rd printing 1990 ISBN: 0-201-51806-6 pages 61-62 'PC Interrupts' 2nd edition by Ralf Brown & Jim Kyle copyright 1994 1st printing 1993 ISBN: 0-201-62485-0 page 211 Note: this fixes an issue with older FreeDOS kernels that expect this structure to contain valid values. Signed-off-by: Kenneth J. Davis Signed-off-by: Matt Fleming --- memdisk/mstructs.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/memdisk/mstructs.h b/memdisk/mstructs.h index fecbff40..0b0dc07d 100644 --- a/memdisk/mstructs.h +++ b/memdisk/mstructs.h @@ -121,9 +121,9 @@ typedef union { uint8_t specify1; /* "First specify byte" */ uint8_t specify2; /* "Second specify byte" */ uint8_t delay; /* Delay until motor turn off */ - uint8_t sectors; /* Sectors/track */ - uint8_t bps; /* Bytes/sector (02h = 512) */ + + uint8_t sectors; /* Sectors/track */ uint8_t isgap; /* Length of intersector gap */ uint8_t dlen; /* Data length (0FFh) */ uint8_t fgap; /* Formatting gap */ -- cgit v1.2.1