Changeset 605 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers

Timestamp:

May 8, 2021, 6:55:56 PM (4 years ago)

Author:

Krister Nordvall

Message:

Changes:

• The "Remove other hard drives" option in the Boot settings menu in XTIDECFG is now exposed in all BIOS builds. This is needed because the system BIOS in at least two Zenith computer models (Z-161 and Z-171) does not clear the BDA HD count which causes it to increment on warm boot. Running "Auto Configure" in XTIDECFG now also tries to identify these machines by doing a CRC check on the system BIOS and sets the option to YES if a match is found.
• WORD_ALIGN is now 2 for XT builds. This should benefit XT class machines with 8086 and NEC V30 CPU:s and the cost is negligible (1 byte for the XT BIOS builds and 12 bytes for XTIDECFG.COM).
• Other minor optimizations.

File:

• trunk/XTIDE_Universal_BIOS/Src/Handlers/Int19h.asm (modified) (2 diffs)

trunk/XTIDE_Universal_BIOS/Src/Handlers/Int19h.asm

@@ -97 +97 @@
     ;call   HotkeyBar_UpdateDuringDriveDetection
 
+    push    ds
+    push    es
+    pop     ds
+
 .WaitUntilTimeToCloseHotkeyBar:
-    call    TimerTicks_ReadFromBdaToAX
-    sub     ax, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.wTimeWhenDisplayed]
+    mov     ax, [BDA.dwTimerTicks]
+    sub     ax, [BOOTVARS.hotkeyVars+HOTKEYVARS.wTimeWhenDisplayed]
     cmp     ax, MIN_TIME_TO_DISPLAY_HOTKEY_BAR
     jb      SHORT .WaitUntilTimeToCloseHotkeyBar
@@ -105 +109 @@
     ; Restore system timer tick handler since hotkeys are no longer needed
     cli
-    mov     ax, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler]
-    mov     [es:BIOS_SYSTEM_TIMER_TICK_INTERRUPT_08h*4], ax
-    mov     ax, [es:BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler+2]
-    mov     [es:BIOS_SYSTEM_TIMER_TICK_INTERRUPT_08h*4+2], ax
+    mov     ax, [BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler]
+    mov     [BIOS_SYSTEM_TIMER_TICK_INTERRUPT_08h*4], ax
+    mov     ax, [BOOTVARS.hotkeyVars+HOTKEYVARS.fpPrevTimerHandler+2]
+    mov     [BIOS_SYSTEM_TIMER_TICK_INTERRUPT_08h*4+2], ax
     sti
+
+    pop     ds
 %endif
     ; Fall to .ResetAllDrives