Changeset 31 for trunk/page1C/silentlink.asm

Timestamp:

08/02/09 03:47:17 (3 years ago)

Author:

brandonlw

Message:

Set up the framework for receiving the TI-OS to dual boot

Files:

• trunk/page1C/silentlink.asm (modified) (3 diffs)

trunk/page1C/silentlink.asm

@@ -9 +9 @@
  EXTERN DispHexA,LdHLInd,SendAcknowledge,ReceiveHeaderPacket,SendSkipExitPacket,Get4BytesNC,SendCommandA
  EXTERN Send4Bytes,SendCAndAddToChecksum,LCDDelay,_LCD_COMMAND,SendAByte,SetXAutoIncrementMode
- EXTERN SetYAutoIncrementMode
+ EXTERN SetYAutoIncrementMode,SendContinue,ReceiveDataPacket
 
 keyscnlnk:
@@ -153 +153 @@
        call SendAcknowledge
        jr keyscnlnkEnd
+
 receivedVariableHeader:
        call ReceiveHeaderPacket
@@ -164 +165 @@
        jr keyscnlnkEnd
 receivingOS:
+       bit receiveTIOS,(iy+linkFlags2)
+       jr z,ReceiveNewOS
+       ld hl,receiveTIOSHandler
+       call APP_PUSH_ERRORH
+;TODO: actually implement all of this
+ReceiveOSPage:
+       call SendContinue
+       ld bc,(ioData)
+       ld hl,appData
+       ld (iMathPtr5),hl
+       call ReceiveDataPacket
+       call Get4BytesNC
+       ld a,(header+1)
+       cp 92h
+       jr z,$F
+       call ReceiveHeaderPacket
+       jr ReceiveOSPage
+$$:    call SendAcknowledge
+;Receive a copy of the TI-OS to the spare Flash sectors
+;Patch the received TI-OS to not erase sector 70h (where we will be backed up)
+;Put the [X,T,theta,N] boot loader in page 0
+       call APP_POP_ERRORH
+receiveTIOSHandler:
+       jr keyscnlnkEnd
+ReceiveNewOS:
+;Start the process of receiving the OS to replace this one
        call EnableLinkAssist
        ld a,0FFh