Changeset 601 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Initialization/AdvancedAta

Timestamp:

Feb 14, 2019, 7:38:08 PM (6 years ago)

Author:

Krister Nordvall

Message:

Changes:

• Building the BIOS now works again.
• Added a new IDE device type/transfer mode for use only with XT-IDE rev 2+ (or Chuck(G)-modded rev 1) cards installed in any of the following machines: Olivetti M24, AT&T PC6300, Xerox 6060 and Logabax Persona 1600. This new transfer mode is slightly faster than the regular XT-IDE rev 1 device type and requires that the card is configured for High Speed mode (or, in case of the card being a rev 1 card, has the Chuck(G) mod done). The new device type is called "XTIDE rev 2 (Olivetti M24)" in XTIDECFG.
• Made some minor improvements to the library code that handles 'Drive Not Ready' errors in XTIDECFG.
• Optimizations.

File:

• trunk/XTIDE_Universal_BIOS/Src/Initialization/AdvancedAta/AdvAtaInit.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Initialization/AdvancedAta/AdvAtaInit.asm

@@ -36 +36 @@
 ;--------------------------------------------------------------------
 AdvAtaInit_DetectControllerForIdeBaseInBX:
-    ; Detect if system has PCI bus. If it does, we can skip VLB detection. This is
+    ; Detect if system has PCI bus. If it does, we can skip VLB detection. This is a
     ; good thing since detecting Vision QD6580 is dangerous since Intel PIIX4 south bridge
     ; mirrors Interrupt Controller registers from Axh to Bxh. This can lead to faulty
@@ -45 +45 @@
     push    bx
     push    di
-    xor     edi, edi        ; Some BIOSes require this to be set to zero
-    mov     ax, PCI_INSTALLATION_CHECK
-    int     BIOS_TIME_PCI_PNP_1Ah
+;   xor     edi, edi        ; Some BIOSes require this to be set to zero
+    ; *FIXME* The above instruction is commented away since RBIL says that this
+    ; only applies to software looking for the protected-mode entry point.
+    mov     ax, PCI_INSTALLATION_CHECK  ; May corrupt EAX, EBX, ECX, EDX, EDI
+    int     BIOS_TIME_PCI_PNP_INTERRUPT_1Ah
     pop     di
     pop     bx