Changeset 120 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers

Timestamp:

Feb 28, 2011, 4:41:41 PM (13 years ago)

Author:

aitotat

google:author:

aitotat

Message:

Changes to XTIDE Universal BIOS:

• Display library now gets initialized.
• Small optimizations.
• Something is still broken.

Location:

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h

Files:

• AH25h_HDrvID.asm (modified) (4 diffs)
• Common/HStatus.asm (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH25h_HDrvID.asm

@@ -80 +80 @@
     out     dx, al                      ; Select Master or Slave drive
     sub     dx, BYTE REG_IDE_DRVHD      ; Back to IDE Base port
-    call    AH25h_GetDriveDetectionTimeoutValue
+
+    ; Wait until ready to accept commands
+    xor     bh, bh                      ; BX now contains bus type
+    mov     cl, B_TIMEOUT_DRVINFO       ; Load short timeout
+    cmp     [RAMVARS.bDrvCnt], bh       ; Detecting first drive?
+    eCMOVE  cl, B_TIMEOUT_RESET         ;  If so, load long timeout
     call    HStatus_WaitRdy             ; Wait until ready to accept commands
     jc      SHORT .Return               ; Return if error
@@ -92 +97 @@
     ; Transfer data
     sub     dx, BYTE REGR_IDE_ST        ; DX to IDE Data Reg
-    xor     bh, bh                      ; BX now contains bus type
     mov     cx, 256                     ; Transfer 256 words (single sector)
     cld                                 ; INSW to increment DI
@@ -98 +102 @@
     call    HStatus_WaitRdyDefTime      ; Wait until drive ready
 
-    ; Return
 .Return:
     pop     bx
@@ -104 +107 @@
     pop     di
     ret
-
-
-;--------------------------------------------------------------------
-; Returns timeout value for drive detection.
-; Long timeout is required for detecting first drive to make sure it is
-; ready after power-on (ATA specification says up to 31 seconds).
-; Short timeout is used for additional drives to prevent long boot time
-; when drive has failed or it is not present.
-;
-; AH25h_GetDriveDetectionTimeoutValue
-;   Parameters:
-;       DS:     Segment to RAMVARS
-;   Returns:
-;       CL:     Timeout value
-;   Corrupts registers:
-;       Nothing
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-AH25h_GetDriveDetectionTimeoutValue:
-    mov     cl, B_TIMEOUT_RESET         ; Load long timeout (assume first drive)
-    cmp     BYTE [RAMVARS.bDrvCnt], 0   ; Detecting first drive?
-    je      SHORT .Return
-    mov     cl, B_TIMEOUT_DRVINFO       ; Load short timeout
-ALIGN JUMP_ALIGN, ret   ; This speed optimization may be unnecessary
-.Return:
-    ret

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/Common/HStatus.asm

@@ -249 +249 @@
 ;       DS:     Segment to RAMVARS
 ;   Returns:
-;       Nothing
+;       CF:     Set if timeout
+;               Cleared if time left
 ;   Corrupts registers:
 ;       CX