Changeset 567 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeDmaBlock.asm

Timestamp:

May 26, 2014, 1:25:15 PM (10 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes:

• Renamed MODULE_FEATURE_SETS to MODULE_POWER_MANAGEMENT.
• Renamed MODULE_VERY_LATE_INITIALIZATION to MODULE_VERY_LATE_INIT and removed it from the official builds.
• Removed the code that skips detection of slave drives on XT-CF controllers since slave drives can be used with Lo-tech ISA CompactFlash boards.
• Added autodetection of the SVC ADP50L controller to XTIDECFG.
• The autodetection of XT-CF controllers now requires MODULE_8BIT_IDE_ADVANCED in the loaded BIOS.
• Fixed a bug in XTIDECFG from r502 where the "Base (cmd block) address" menu option would be displayed when a serial device was selected as the IDE controller.
• XTIDECFG would display the "Enable interrupt" menu option for the XTIDE r1 but not for the XTIDE r2. It's now displayed for both controller types.
• Disabled the "Internal Write Cache" menu option in the Master/Slave Drive menus for serial device type drives.
• Optimizations and other fixes.

File:

• trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeDmaBlock.asm (modified) (3 diffs)

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

@@ -2 +2 @@
 ; Description   :   IDE Read/Write functions for transferring block using DMA.
 ;                   These functions should only be called from IdeTransfer.asm.
-
-; Modified JJP 05-Jun-13
 
 ;
@@ -91 +89 @@
     ; Calculate bytes for first page
     mov     ax, di
-    neg     ax          ; 2s compliment
+    neg     ax          ; 2s complement
 
     ; If DI was zero carry flag will be cleared (and set otherwise)
@@ -187 +185 @@
     jz      SHORT .TransferNextBlock    ; All bytes transferred?
 %else   ; Fast DMA code - perform computed number of transfers, then check DMA status register to be sure
-    add     cx, BYTE 15                 ; We'll divide transfers in 16-byte atomic transfers,
-    eSHR_IM cx, 4                       ; so include any partial block, which will be terminated
-ALIGN JUMP_ALIGN                        ; by the DMA controller raising T/C
+    ; We'll divide transfers in 16-byte atomic transfers, so include any partial block, which will be terminated by the DMA controller raising T/C
+    add     cx, BYTE 15
+
+%ifdef USE_186
+    shr     cx, 4
+%else
+    xchg    cx, ax
+    mov     cl, 4
+    shr     ax, cl
+    xchg    cx, ax
+%endif
+
+ALIGN JUMP_ALIGN
 .TransferNextDmaBlock:
     out     dx, al                      ; Transfer up to 16 bytes to/from XT-CF card