Changeset 471 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Inc

Timestamp:

Oct 1, 2012, 6:33:28 PM (12 years ago)

Author:

aitotat@…

google:author:

aitotat@gmail.com

Message:

Changes to XTIDE Universal BIOS:

• XT-CF Control Register definitions should now be correct.
• Preparations for new function: AH=1Eh, Lo-tech XT-CF Features.

Location:

trunk/XTIDE_Universal_BIOS/Inc

Files:

• Controllers/XTCF.inc (modified) (2 diffs)
• ModuleDependency.inc (modified) (1 diff)

trunk/XTIDE_Universal_BIOS/Inc/Controllers/XTCF.inc

@@ -28 +28 @@
 XTCF_BASE_PORT_2                    EQU     240h
 XTCF_BASE_PORT_3                    EQU     300h    ; Default setting
-XTCF_BASE_PORT_4                    EQU     320h
+XTCF_BASE_PORT_4                    EQU     340h
 
 
@@ -35 +35 @@
 XTCT_CONTROL_REGISTER_INVERTED_in   EQU     1Eh
 
+; Control Register contents:
+;
+; Control Register holds high byte from Sector Window segment if >= A0h
+; (First possible segment for Sector Window is A000h)
+; 
+; 8-bit PIO transfers (port I/O) are used if Control Register is zero.
+; Any other value means DMA transfers (using DMA channel 3).
 
-; Bit Definitions for XT-CF Control Register
-MASK_XTCF_BASE_PORT_in              EQU     (3<<0)  ; Bits 0...1
-    XTCF_PORT_200h                  EQU     0
-    XTCF_PORT_240h                  EQU     1
-    XTCF_PORT_300h                  EQU     2       ; Default
-    XTCF_PORT_320h                  EQU     3
-FLG_PIO8_INSTEAD_OF_DMA             EQU     (1<<2)  ; Set to enable PIO8, clear to enable DMA (Channel 3)
-FLG_AT_ZERO_WAIT_STATE_in           EQU     (1<<3)
-MASK_SECTOR_WINDOW_SEGMENT_in       EQU     (7<<4)  ; Bits 4...6
-    XTCF_SECTOR_WINDOW_AT_C000h     EQU     0
-    XTCF_SECTOR_WINDOW_AT_C800h     EQU     1
-    XTCF_SECTOR_WINDOW_AT_D000h     EQU     2       ; Default
-    XTCF_SECTOR_WINDOW_AT_D800h     EQU     3
-    XTCF_SECTOR_WINDOW_AT_E000h     EQU     4
-    XTCF_SECTOR_WINDOW_AT_E800h     EQU     5
-FLG_XTCF_ROM_ENABLE_in              EQU     (1<<7)
+
+; Subcommands for AH=1Eh, Lo-tech XT-CF features.
+; Return values common for all subcommands:
+;       AH:     RET_HD_SUCCESS if drive is XT-CF
+;               RET_HD_INVALID if drive is not XT-CF
+;       CF:     0 if successful, 1 if error
+
+;--------------------------------------------------------------------
+; IS_THIS_DRIVE_XTCF
+;   Parameters:
+;       DL:     Drive Number
+;--------------------------------------------------------------------
+IS_THIS_DRIVE_XTCF                  EQU     0
+
+;--------------------------------------------------------------------
+; IS_XTCF_IN_PORT_CX
+;   Parameters:
+;       CX:     Port to search XT-CF from (can be anything)
+;   Returns:
+;       AH:     RET_HD_SUCCESS if XT-CF is found from port
+;               RET_HD_INVALID if XT-CF is not found
+;--------------------------------------------------------------------
+IS_XTCF_IN_PORT_CX                  EQU     1
+
+;--------------------------------------------------------------------
+; READ_XTCF_CONTROL_REGISTER_TO_DH
+;   Parameters:
+;       DL:     Drive Number
+;   Returns:
+;       DH:     XT-CF Control Register contents
+;--------------------------------------------------------------------
+READ_XTCF_CONTROL_REGISTER_TO_DH    EQU     2
+
+;--------------------------------------------------------------------
+; WRITE_DH_TO_XTCF_CONTROL_REGISTER
+;   Parameters:
+;       DH:     Byte to write to XT-CF Control Register
+;       DL:     Drive Number
+;--------------------------------------------------------------------
+WRITE_DH_TO_XTCF_CONTROL_REGISTER   EQU     3
 
 

trunk/XTIDE_Universal_BIOS/Inc/ModuleDependency.inc

@@ -43 +43 @@
 %ifdef MODULE_8BIT_IDE
     %include "IDE_8bit.inc"         ; For IDE 8-bit data port macros
+    %include "XTCF.inc"             ; For Lo-tech XT-CF
 %endif