Changeset 536 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Device/IDE/JrIdeTransfer.asm

Timestamp:

Apr 10, 2013, 6:27:15 PM (11 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes:

• Added support for the Silicon Valley Computer ADP50L controller (and possibly other IDE controllers from SVC using memory mapped I/O). Please note that this has not been tested in any way since I don't have any of these cards myself (make backups before trying this on drives with important data). Also, *if* it works, make sure it works reliably (stress test the disk system). Some things you should know: 1) Autodetection for this controller has not been added to XTIDECFG, you need to manually select the "SVC ADP50L" controller (and possibly change the BIOS segment address if not using the default of C800h). 2) The memory mapped I/O window is inside the ROM address space of the controller. The XTIDE Universal BIOS currently do not support this so that means you need to use another ROM (for example, an XTIDE or XTCF card or the BOOT ROM of a NIC). This presents another problem, the original ADP50L BIOS needs to be disabled somehow to avoid conflicts. Either pull the ROM chip or disable the BIOS by removing jumper J3. Note, I have no idea if any of this will actually work. It's basically a shot in the dark.

File:

• trunk/XTIDE_Universal_BIOS/Src/Device/IDE/JrIdeTransfer.asm (modified) (5 diffs)

trunk/XTIDE_Universal_BIOS/Src/Device/IDE/JrIdeTransfer.asm

@@ -27 +27 @@
     .bSectorsDone           resb    1   ; 8, Number of sectors xferred
 endstruc
-
-SECTOR_ACCESS_WINDOW_SIZE   EQU     512 ; 512 bytes
 
 
@@ -68 +66 @@
     mov     dx, [di+DPT.wBasePort]
     cmp     BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_JRIDE_ISA
-    jne     SHORT .GetSectorAccessWindowForXTCF
-
-    ; Get Sector Access Window for JR-IDE/ISA
+    jb      SHORT .GetSectorAccessWindowForXTCF
+
+    ; Get Sector Access Window for JR-IDE/ISA and ADP50L
+    mov     ds, dx      ; Segment for JR-IDE/ISA and ADP50L
     mov     di, JRIDE_SECTOR_ACCESS_WINDOW_OFFSET
-    mov     ds, dx      ; Segment for JR-IDE/ISA
+    je      SHORT .SectorAccessWindowLoadedToDSDI
+    mov     di, ADP50L_SECTOR_ACCESS_WINDOW_OFFSET
     jmp     SHORT .SectorAccessWindowLoadedToDSDI
 
@@ -231 +231 @@
     mov     bx, di
     mov     dx, cx
-    xor     cl, cl
+    xor     cx, cx
 ALIGN JUMP_ALIGN
 .WriteNextSector:
-    mov     ch, SECTOR_ACCESS_WINDOW_SIZE >> 9
+    inc     ch
     rep movsw
     mov     di, bx  ; Reset for next sector
@@ -258 +258 @@
     mov     bx, si
     mov     dx, cx
-    xor     cl, cl
+    xor     cx, cx
 ALIGN JUMP_ALIGN
 .ReadNextSector:
-    mov     ch, SECTOR_ACCESS_WINDOW_SIZE >> 9
+    inc     ch
     rep movsw
     mov     si, bx  ; Reset for next sector
@@ -289 +289 @@
     ret
 
-
-%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
-%if SECTOR_ACCESS_WINDOW_SIZE <> 512
-    %error "SECTOR_ACCESS_WINDOW_SIZE is no longer equal to 512. JrIdeTransfer.asm needs changes."
-%endif
-%endif