Changeset 601 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Device/IDE/JrIdeTransfer.asm

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/Device/IDE/JrIdeTransfer.asm (modified) (8 diffs)

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

@@ -100 +100 @@
     jc      SHORT ReturnWithMemoryIOtransferErrorInAH
 
-    mov     cx, [bp+MEMPIOVARS.wSectorsInBlock] ; Clears CH
-    cmp     [bp+MEMPIOVARS.bSectorsLeft], cl
+    mov     dx, [bp+MEMPIOVARS.wSectorsInBlock] ; Clears DH
+    cmp     [bp+MEMPIOVARS.bSectorsLeft], dl
     jbe     SHORT .ReadLastBlockFromDrive
 
@@ -119 +119 @@
     ; transferred, there will be a wait for next block but DRQ is never
     ; set since all is transferred! Then we get timeout error.
-    mov     cx, [bp+MEMPIOVARS.wSectorsInBlock]
-    sub     [bp+MEMPIOVARS.bSectorsLeft], cl
-    add     [bp+MEMPIOVARS.bSectorsDone], cl
-    cmp     [bp+MEMPIOVARS.bSectorsLeft], cl
+    mov     dx, [bp+MEMPIOVARS.wSectorsInBlock]
+    sub     [bp+MEMPIOVARS.bSectorsLeft], dl
+    add     [bp+MEMPIOVARS.bSectorsDone], dl
+    cmp     [bp+MEMPIOVARS.bSectorsLeft], dl
     ja      SHORT .ReadNextBlockFromDrive
 
 ALIGN JUMP_ALIGN
 .ReadLastBlockFromDrive:
-    mov     cl, [bp+MEMPIOVARS.bSectorsLeft]
-    push    cx
+    mov     dl, [bp+MEMPIOVARS.bSectorsLeft]
+    push    dx
     call    ReadSingleBlockFromSectorAccessWindowInDSSItoESDI
 
@@ -181 +181 @@
     jc      SHORT ReturnWithMemoryIOtransferErrorInAH
 
-    mov     cx, [bp+MEMPIOVARS.wSectorsInBlock]
-    cmp     [bp+MEMPIOVARS.bSectorsLeft], cl
+    mov     dx, [bp+MEMPIOVARS.wSectorsInBlock]
+    cmp     [bp+MEMPIOVARS.bSectorsLeft], dl
     jbe     SHORT .WriteLastBlockToDrive
 
@@ -192 +192 @@
 
     ; Increment number of successfully written WORDs
-    mov     cx, [bp+MEMPIOVARS.wSectorsInBlock]
-    sub     [bp+MEMPIOVARS.bSectorsLeft], cl
-    add     [bp+MEMPIOVARS.bSectorsDone], cl
-    cmp     [bp+MEMPIOVARS.bSectorsLeft], cl
+    mov     dx, [bp+MEMPIOVARS.wSectorsInBlock]
+    sub     [bp+MEMPIOVARS.bSectorsLeft], dl
+    add     [bp+MEMPIOVARS.bSectorsDone], dl
+    cmp     [bp+MEMPIOVARS.bSectorsLeft], dl
     ja      SHORT .WriteNextBlockToDrive
 
 ALIGN JUMP_ALIGN
 .WriteLastBlockToDrive:
-    mov     cl, [bp+MEMPIOVARS.bSectorsLeft]
-    push    cx
+    mov     dl, [bp+MEMPIOVARS.bSectorsLeft]
+    push    dx
     ePUSH_T bx, CheckErrorsAfterTransferringLastMemoryMappedBlock
     ; Fall to WriteSingleBlockFromDSSIToSectorAccessWindowInESDI
@@ -208 +208 @@
 ; WriteSingleBlockFromDSSIToSectorAccessWindowInESDI
 ;   Parameters:
-;       CX:     Number of sectors in block
+;       DX:     Number of sectors in block
 ;       DS:SI:  Normalized ptr to source buffer
 ;       ES:DI:  Ptr to Sector Access Window
@@ -220 +220 @@
 WriteSingleBlockFromDSSIToSectorAccessWindowInESDI:
     mov     bx, di
-    mov     dx, cx
     xor     cx, cx
 ALIGN JUMP_ALIGN
@@ -235 +234 @@
 ; ReadSingleBlockFromSectorAccessWindowInDSSItoESDI
 ;   Parameters:
-;       CX      Number of sectors in full block or sectors in last partial block
-;       ES:DI:  Normalized ptr to buffer to receive data (destination)
-;       DS:SI:  Ptr to Sector Access Window (source)
+;       DX:     Number of sectors in block
+;       ES:DI:  Normalized ptr to destination buffer
+;       DS:SI:  Ptr to Sector Access Window
 ;   Returns:
 ;       CX, DX: Zero
@@ -247 +246 @@
 ReadSingleBlockFromSectorAccessWindowInDSSItoESDI:
     mov     bx, si
-    mov     dx, cx
     xor     cx, cx
 ALIGN JUMP_ALIGN