Changeset 491 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization/DetectDrives.asm

Timestamp:

Dec 15, 2012, 2:46:29 PM (11 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes:

• Added a new define (USE_UNDOC_INTEL) that enables optimizations possible by using undocumented instructions available on all Intel processors and truly compatible clones. AFAIK the only exceptions are the NEC V-series and the Sony CXQ70108 processors so this option should be safe for use on the AT builds.
• Building BIOSDRVS or the BIOS without MODULE_STRINGS_COMPRESSED would fail due to the recent code exclusions so I changed them a bit. Also fixed the mistaken change to Main.asm
• Changed the Tandy specific info in Configuration_FullMode.txt so it matches the info in the Wiki.
• Optimizations and fixes in general.

File:

• trunk/XTIDE_Universal_BIOS/Src/Initialization/DetectDrives.asm (modified) (5 diffs)

trunk/XTIDE_Universal_BIOS/Src/Initialization/DetectDrives.asm

@@ -3 +3 @@
 
 ;
-; XTIDE Universal BIOS and Associated Tools 
+; XTIDE Universal BIOS and Associated Tools
 ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
 ;
@@ -10 +10 @@
 ; the Free Software Foundation; either version 2 of the License, or
 ; (at your option) any later version.
-; 
+;
 ; This program is distributed in the hope that it will be useful,
 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-; GNU General Public License for more details.      
+; GNU General Public License for more details.
 ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
-;       
+;
 
 ; Section containing code
@@ -153 +153 @@
 ;--------------------------------------------------------------------
 StartDetectionWithDriveSelectByteInBHandStringInCX:
+%ifdef MODULE_8BIT_IDE
     ; Autodetect port for XT-CF
-%ifdef MODULE_8BIT_IDE
     call    DetectDrives_DoesIdevarsInCSBPbelongToXTCF
     jne     SHORT .SkipXTCFportDetection
@@ -165 +165 @@
     ; for next drive (another XT-CF card on same system)
 .DetectNextPort:
-    call    BootVars_GetNextXTCFportToDetectToDX
-    cmp     dx, XTCF_BASE_PORT_4
+    mov     dx, [es:BOOTVARS.wNextXTCFportToScan]
+    xor     dl, 40h
+    jnz     SHORT .StoreNextXTCFportToScan
+    inc     dh
+    cmp     dh, XTCF_BASE_PORT_4 >> 8
     ja      SHORT .SkipXTCFportDetection        ; XT-CF not found from any port
+.StoreNextXTCFportToScan:
+    mov     [es:BOOTVARS.wNextXTCFportToScan], dx
 
     call    AH1Eh_DetectXTCFwithBasePortInDX
@@ -178 +183 @@
     jmp     SHORT .DriveDetectionStringPrintedOnScreen
 
-    ; Print detect string for devices that do not support autodetection     
+    ; Print detect string for devices that do not support autodetection
 .SkipXTCFportDetection:
     push    dx