Changeset 606 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/makefile

Timestamp:

May 15, 2021, 8:27:11 PM (4 years ago)

Author:

Krister Nordvall

Message:

Changes:

• RESERVE_DIAGNOSTIC_CYLINDER has been completely removed as it wasted hard drive space, caused a compatibility problem with 32-bit disk access drivers under Windows 3.x and most importantly, it was in fact not needed since the same thing can be accomplished using the "User specified CHS" feature in XTIDECFG which is better because that applies only to that specific drive instead of all drives under XUB control.
• In BIOS builds containing MODULE_EBIOS (i.e. all official builds except the Tiny build), drives with a cylinder count less than or equal to 1024 had CHS translation applied to them unnecessarily if CHS translation method was set to Auto (which is the default). This bug has been present for a long time and, as a side effect, made RESERVE_DIAGNOSTIC_CYLINDER useless since the idea behind that was to provide compatibility with other old BIOSes using NORMAL addressing mode. WARNING! With this bug now being fixed, upgrading to this revision of the BIOS will require repartitioning and reformatting any drives affected by this (BIOSDRVS.COM can be helpful in determining which drives are affected).

File:

• trunk/XTIDE_Universal_BIOS/makefile (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/makefile

@@ -36 +36 @@
 # ELIMINATE_CGA_SNOW          Prevents CGA snowing at the cost of a few bytes                      #
 # RELOCATE_INT13H_STACK **    Relocates INT 13h stack to beginning of stolen conventional memory   #
-# RESERVE_DIAGNOSTIC_CYLINDER Reserve one L-CHS cylinder for compatibility with old BIOSes         #
 # NO_ATAID_VALIDATION ***     Excludes code that tries to ensure proper communication with drives  #
 # USE_186                     Use instructions supported by 80188/80186 and V20/V30 and later      #
@@ -107 +106 @@
 # Assembler preprocessor defines.                               #
 #################################################################
-DEFINES_COMMON = MODULE_STRINGS_COMPRESSED MODULE_HOTKEYS MODULE_8BIT_IDE MODULE_EBIOS MODULE_SERIAL MODULE_SERIAL_FLOPPY MODULE_POWER_MANAGEMENT RESERVE_DIAGNOSTIC_CYLINDER NO_ATAID_VALIDATION CLD_NEEDED
+DEFINES_COMMON = MODULE_STRINGS_COMPRESSED MODULE_HOTKEYS MODULE_8BIT_IDE MODULE_EBIOS MODULE_SERIAL MODULE_SERIAL_FLOPPY MODULE_POWER_MANAGEMENT NO_ATAID_VALIDATION CLD_NEEDED
 DEFINES_COMMON_LARGE = MODULE_BOOT_MENU MODULE_8BIT_IDE_ADVANCED MODULE_COMPATIBLE_TABLES