Changeset 603 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Menus

Timestamp:

Nov 6, 2020, 2:49:32 PM (4 years ago)

Author:

Krister Nordvall

Message:

Changes:

• Fixed a bug in Strings.asm from r589 where building the BIOS without MODULE_STRINGS_COMPRESSED would fail. Also removed a redundant CR to save a byte when building without MODULE_STRINGS_COMPRESSED.
• Optimized the code in MODULE_HOTKEYS to reduce ROM space usage, stack usage and time spent in the user timer tick interrupt handler (1Ch). I hope this will fix the problem with hangs introduced in r599.

File:

• trunk/XTIDE_Universal_BIOS/Src/Menus/HotkeyBar.asm (modified) (10 diffs)

trunk/XTIDE_Universal_BIOS/Src/Menus/HotkeyBar.asm

@@ -23 +23 @@
 
 ;--------------------------------------------------------------------
-; Handler for INT 1Ch System Timer Tick.
+; Handler for INT 1Ch User Timer Tick.
 ; Reads key presses and draws hotkey bar.
 ;
 ; HotkeyBar_TimerTickHandler
 ;   Parameters:
-;       DS:     RAMVARS segment
-;       ES:     BDA segment (zero)
+;       Nothing
 ;   Returns:
 ;       Nothing
@@ -38 +37 @@
 HotkeyBar_TimerTickHandler:
     push    es
+%ifndef USE_186     ; LOAD_BDA_SEGMENT_TO will corrupt AX on 8088/8086
+    push    ax
+%endif
+
+    ;!!! Keep interrupts disabled so there won't be another
+    ; timer tick call before we are ready
+
+    LOAD_BDA_SEGMENT_TO es, ax
+
+    ; Call previous handler
+    pushf
+    call    FAR [es:BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler]
+
+    ; Update Hotkeybar (process key input and draw) every fourth tick
+    test    BYTE [es:BDA.dwTimerTicks], 11b
+    jnz     SHORT .ReturnFromHandler
+
     push    ds
 %ifdef USE_186
-    ePUSHA
+    pusha
 %else
     push    di
@@ -46 +62 @@
     push    dx
     push    cx
-    push    ax
-%endif
-
-    ;!!! Keep interrupts disabled so there won't be another
-    ; timer tick call before we are ready
-
-    LOAD_BDA_SEGMENT_TO es, ax
+%endif
     call    RamVars_GetSegmentToDS
-
-    ; Call previous handler
-    pushf
-    call    FAR [es:BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler]
-
-    ; Update Hotkeybar (process key input and draw) every fourth tick
-    test    BYTE [es:BDA.dwTimerTicks], 11b
-    jnz     SHORT .ReturnFromHandler
-    call    UpdateDuringDriveDetection
-
-.ReturnFromHandler:
+    call    HotkeyBar_UpdateDuringDriveDetection
 %ifdef USE_186
-    ePOPA
+    popa
 %else
-    pop     ax
     pop     cx
     pop     dx
@@ -75 +74 @@
 %endif
     pop     ds
+
+.ReturnFromHandler:
+%ifndef USE_186
+    pop     ax
+%endif
     pop     es
     iret
@@ -91 +95 @@
 ;       AX, CX, DX, SI, DI
 ;--------------------------------------------------------------------
-UpdateDuringDriveDetection:
+HotkeyBar_UpdateDuringDriveDetection:
     call    ScanHotkeysFromKeyBufferAndStoreToBootvars
 
@@ -113 +117 @@
 ;--------------------------------------------------------------------
 HotkeyBar_DrawToTopOfScreen:
-    ; Store current screen coordinates to be restored
-    ; when Hotkey Bar is rendered
-    call    DetectPrint_GetSoftwareCoordinatesToAX
+    ; Store current screen coordinates to stack
+    ; (to be restored when Hotkey Bar is rendered)
+    CALL_DISPLAY_LIBRARY GetSoftwareCoordinatesToAX
     push    ax
 
-    call    MoveCursorToScreenTopLeftCorner
+    ; Move cursor to top left corner (0, 0)
+    xor     ax, ax
+    call    HotkeyBar_SetCursorCoordinatesFromAX
     ; Fall to .PrintFloppyDriveHotkeys
 
@@ -230 +236 @@
 ;--------------------------------------------------------------------
 .EndHotkeyBarRendering:
-    call    HotkeyBar_ClearRestOfTopRow
-    pop     ax
-    jmp     SHORT HotkeyBar_RestoreCursorCoordinatesFromAX
-
-
-;--------------------------------------------------------------------
-; HotkeyBar_ClearRestOfTopRow
-;   Parameters:
-;       Nothing
-;   Returns:
-;       Nothing
-;   Corrupts registers:
-;       AX, CX, DI
-;--------------------------------------------------------------------
-HotkeyBar_ClearRestOfTopRow:
+    ; Clear the rest of the top row
     CALL_DISPLAY_LIBRARY GetColumnsToALandRowsToAH
     eMOVZX  cx, al
@@ -250 +242 @@
     sub     cl, al
     mov     al, ' '
-    JMP_DISPLAY_LIBRARY PrintRepeatedCharacterFromALwithCountInCX
+    CALL_DISPLAY_LIBRARY PrintRepeatedCharacterFromALwithCountInCX
+
+    ; Restore the saved coordinates from stack
+    pop     ax
+    ; Fall to HotkeyBar_SetCursorCoordinatesFromAX
+
+
+;--------------------------------------------------------------------
+; HotkeyBar_SetCursorCoordinatesFromAX
+;   Parameters:
+;       Nothing
+;   Returns:
+;       Nothing
+;   Corrupts registers:
+;       AX, DI
+;--------------------------------------------------------------------
+HotkeyBar_SetCursorCoordinatesFromAX:
+    JMP_DISPLAY_LIBRARY SetCursorCoordinatesFromAX
 
 
@@ -373 +382 @@
 
 ;--------------------------------------------------------------------
-; MoveCursorToScreenTopLeftCorner
-;   Parameters:
-;       Nothing
-;   Returns:
-;       Nothing
-;   Corrupts registers:
-;       AX, DI
-;--------------------------------------------------------------------
-MoveCursorToScreenTopLeftCorner:
-    xor     ax, ax          ; Top left corner (0, 0)
-    ; Fall to HotkeyBar_RestoreCursorCoordinatesFromAX
-
-
-;--------------------------------------------------------------------
-; HotkeyBar_RestoreCursorCoordinatesFromAX
-;   Parameters:
-;       Nothing
-;   Returns:
-;       Nothing
-;   Corrupts registers:
-;       AX, DI
-;--------------------------------------------------------------------
-HotkeyBar_RestoreCursorCoordinatesFromAX:
-    JMP_DISPLAY_LIBRARY SetCursorCoordinatesFromAX
-
-
-;--------------------------------------------------------------------
 ; HotkeyBar_StoreDefaultDriveLettersToHotkeyVars
 ;   Parameters:
@@ -432 +414 @@
 
     ; Store system 1Ch Timer Tick handler and install our hotkeybar handler
-    mov     ax, [BIOS_SYSTEM_TIMER_TICK_INTERRUPT_1Ch*4]
+    mov     ax, [BIOS_USER_TIMER_TICK_INTERRUPT_1Ch*4]
     mov     [BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler], ax
-    mov     ax, [BIOS_SYSTEM_TIMER_TICK_INTERRUPT_1Ch*4+2]
+    mov     ax, [BIOS_USER_TIMER_TICK_INTERRUPT_1Ch*4+2]
     mov     [BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler+2], ax
-    mov     al, BIOS_SYSTEM_TIMER_TICK_INTERRUPT_1Ch
+    mov     al, BIOS_USER_TIMER_TICK_INTERRUPT_1Ch
     mov     si, HotkeyBar_TimerTickHandler
     call    Interrupts_InstallHandlerToVectorInALFromCSSI