Changeset 47 for trunk/page00/boot.asm

Timestamp:

10/10/09 03:20:47 (3 years ago)

Author:

brandonlw

Message:

I'm reaching a point where I really need to be adding oncalc debugging tools, so I guess I'll start working on the system monitor and a basic menu system, rebuilding the APPS and PRGM menus to start with.
From there I can get a Calcsys-style hex editor in there and oncalc usb8x/USBTools-style logging.
Heck, maybe I can even transfer Calcsys TO it and execute at least part of it.
It's a lot of work and kind of off-track, but it's the only way I'm going to diagnose the dual booting and linking problems.

Files:

• trunk/page00/boot.asm (modified) (5 diffs)

trunk/page00/boot.asm

@@ -11 +11 @@
  EXTERN outputPage,NZIf83Plus,_ZERO_PORT_3,_OUT_PORT_3,AnimateRunIndicator,PowerOff
  EXTERN DispHexA,DispHexHL,IPutC,ReadKeyboardKey,ReadKeypad,ClrLCDFull
- EXTERN curBlink,resetAPDTimer,UpdateAPD,BCALL,BJUMP,CopyRAMToFlashPage
+ EXTERN curBlink,resetAPDTimer,UpdateAPD,BCALL,BJUMP,CopyRAMToFlashPage,cphlde,CalculateOSChecksum
  EXTERN _HandleDefaultUSBInterrupt,_ReadUSBInterruptData,_HandleUSBInterruptInitialize,CopyToRAMPage
  EXTERN _HandleUSBACablePluggedIn,_HandleUSBACableUnplugged,_HandleUSBBCablePluggedIn,_HandleUSBBCableUnplugged
- EXTERN GetHexA,GetHexHL,CursorOff,RunIndicOn,SetFastSpeed,CanAlph,homescreenContextVectors,SetContrast
+ EXTERN GetHexA,GetHexHL,CursorOff,RunIndicOn,SetFastSpeed,CanAlph,homescreenContextVectors,SetContrast,_PULLDOWNCHK
 
 ;0000h:
@@ -438 +438 @@
        ld sp,0FFC5h
        ld iy,flags
+       B_CALL ClrScrnFull
        ;Do any other initialization
        ;Appear "off"
@@ -474 +475 @@
        res receiveTIOS,(iy+linkFlags2)
 ;Start the OS, minimal as it is
+       call CalculateOSChecksum
+       ld de,(RAMChecksum)
+       call cphlde
+       jr z,$F
+       ;The RAM checksum check has failed, so wipe out RAM and hope for the best
+       ;TODO: figure out what this actually needs to do
+;       ld hl,appData
+;       ld de,appData+1
+;       ld bc,7FFFh
+;       ld (hl),0
+;       ldir
+;       jp 0000h
+$$:    ;Screw up the RAM checksum so it's no longer valid
+       dec de
+       ld (RAMChecksum),de
        call ClrLCDFull
        res indicOnly,(iy+indicFlags)
@@ -507 +523 @@
        call APP_PUSH_ERRORH
        ld (onSP),sp
+RestartMon:
 _Mon:  xor a
        ld (kbdKey),a
@@ -515 +532 @@
        call CursorOff
        call RunIndicOn
+       call _PULLDOWNCHK
+       jr c,RestartMon
        call CallcxMain
        jr _Mon