Changeset 258 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Boot/BootMenuPrintCfg.asm

Timestamp:

Feb 22, 2012, 7:01:53 PM (13 years ago)

Author:

gregli@…

google:author:

gregli@hotmail.com

Message:

Added floppy drive emulation over the serial connection (MODULE_SERIAL_FLOPPY). Along the way, various optimizations were made to stay within the 8K ROM size target. Also, serial code now returns the number of sectors transferred.

File:

• trunk/XTIDE_Universal_BIOS/Src/Boot/BootMenuPrintCfg.asm (modified) (11 diffs)

trunk/XTIDE_Universal_BIOS/Src/Boot/BootMenuPrintCfg.asm

@@ -2 +2 @@
 ; Description   :   Functions for printing drive configuration
 ;                   information on Boot Menu.
-
+;
+; Included by BootMenuPrint.asm, this routine is to be inserted into
+; BootMenuPrint_HardDiskRefreshInformation.
+;
 ; Section containing code
 SECTION .text
+
+;;; fall-into from BootMenuPrint_HardDiskRefreshInformation.
 
 ;--------------------------------------------------------------------
@@ -16 +21 @@
 ;       Nothing
 ;   Corrupts registers:
-;       AX, BX, CX, DX, SI, DI
+;       AX, BX, CX, DX
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-BootMenuPrintCfg_ForOurDrive:
+.BootMenuPrintCfg_ForOurDrive:
     eMOVZX  ax, BYTE [di+DPT.bIdevarsOffset]
-    xchg    si, ax                      ; CS:SI now points to IDEVARS
+    xchg    bx, ax                      ; CS:BX now points to IDEVARS
     ; Fall to .PushAndFormatCfgString
 
@@ -28 +32 @@
 ;   Parameters:
 ;       DS:DI:  Ptr to DPT
-;       CS:SI:  Ptr to IDEVARS
+;       CS:BX:  Ptr to IDEVARS
 ;   Returns:
 ;       Nothing (jumps to next push below)
 ;   Corrupts registers:
-;       AX, BX
+;       AX, CX
 ;--------------------------------------------------------------------
 .PushAddressingMode:
@@ -41 +45 @@
     ;; with AL clear, and so we exchange AL and AH after the multiply for the final result.
     ;; 
-    mov     bl,(1<<(8-ADDRESSING_MODE_FIELD_POSITION)) * g_szAddressingModes_Displacement
-    mul     bl
+    mov     cl,(1<<(8-ADDRESSING_MODE_FIELD_POSITION)) * g_szAddressingModes_Displacement
+    mul     cl
     xchg    al,ah
     add     ax,g_szAddressingModes
@@ -51 +55 @@
 ;   Parameters:
 ;       DS:DI:  Ptr to DPT
-;       CS:SI:  Ptr to IDEVARS
+;       CS:BX:  Ptr to IDEVARS
 ;   Returns:
 ;       Nothing (falls to next push below)
@@ -69 +73 @@
 ;   Parameters:
 ;       DS:DI:  Ptr to DPT
-;       CS:SI:  Ptr to IDEVARS
+;       CS:BX:  Ptr to IDEVARS
 ;   Returns:
 ;       Nothing (jumps to next push below)
@@ -77 +81 @@
 .PushBusType:
     mov     al,g_szBusTypeValues_Displacement
-    mul     BYTE [cs:si+IDEVARS.bDevice]
+    mul     BYTE [cs:bx+IDEVARS.bDevice]
         
     shr     ax,1            ; divide by 2 since IDEVARS.bDevice is multiplied by 2
@@ -88 +92 @@
 ;   Parameters:
 ;       DS:DI:  Ptr to DPT
-;       CS:SI:  Ptr to IDEVARS
+;       CS:BX:  Ptr to IDEVARS
 ;   Returns:
 ;       Nothing (falls to next push below)
@@ -95 +99 @@
 ;--------------------------------------------------------------------
 .PushIRQ:
-    mov     al, BYTE [cs:si+IDEVARS.bIRQ]
+    mov     al, BYTE [cs:bx+IDEVARS.bIRQ]
     cbw
     push    ax
@@ -103 +107 @@
 ;   Parameters:
 ;       DS:DI:  Ptr to DPT
-;       CS:SI:  Ptr to IDEVARS
+;       CS:BX:  Ptr to IDEVARS
 ;   Returns:
 ;       Nothing (falls to next push below)
@@ -114 +118 @@
     push    ax
 
-;--------------------------------------------------------------------
-; PrintValuesFromStack
-;   Parameters:
-;       Stack:  All formatting parameters
-;   Returns:
-;       Nothing
-;   Corrupts registers:
-;       AX, SI, DI
-;--------------------------------------------------------------------
-.PrintValuesFromStack:
-    jmp     BootMenuPrint_HardDiskRefreshInformation.output
-
+;;; fall-out to BootMenuPrint_HardDiskRefreshInformation.