Translated improvement into hex1 version of stage1_assembler-2
This commit is contained in:
Jeremiah Orians
parent
cdea34fa4f
commit
d75b146eb0
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@ -4,6 +4,7 @@
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# ;; We will be using R14 for our condition codes
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2D2F7fff # LOADUI R15 0x7FFF ; We will be using R15 for our stack
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# ;; Main program functionality
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# ;; Reads in Tape_01 and writes out results onto Tape_02
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# ;; Accepts no arguments and HALTS when done
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@ -38,6 +39,7 @@
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42100002 # FCLOSE
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FFFFFFFF # HALT
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# ;; First pass function
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# ;; Reads Tape_01 and creates our label table
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# ;; Will Overwrite R0 R10 R11
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@ -49,14 +51,19 @@ FFFFFFFF # HALT
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# ;; Check for EOF
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A0100000 # CMPSKIP.GE R0 0
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0D01001F # RET R15
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# ;; Check for and deal with label
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# ;; Check for and deal with label (:)
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A030003a # CMPSKIP.NE R0 58
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3C00 @5 # JUMP @storeLabel
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# ;; Check for and deal with pointers to labels
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# ;; Starting with (@)
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A0300040 # CMPSKIP.NE R0 64
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3C00 @6 # JUMP @ThrowAwayPointer
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# ;; Then dealing with ($)
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A0300024 # CMPSKIP.NE R0 36
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3C00 @6 # JUMP @ThrowAwayPointer
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# ;; Now check for absolute addresses (&)
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A0300026 # CMPSKIP.NE R0 38
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3C00 @v # JUMP @ThrowAwayAddress
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# ;; Otherwise attempt to process
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2D0F @7 # CALLI R15 @hex ; Convert it
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A0100000 # CMPSKIP.GE R0 0 ; Don't record, nonhex values
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@ -73,6 +80,7 @@ A0100000 # CMPSKIP.GE R0 0 ; Don't record, nonhex values
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0FBB0001 # ADDUI R11 R11 1 ; increment PC now that that we have a full byte
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3C00 @2 # JUMP @first_pass
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# ;; Second pass function
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# ;; Reads from Tape_01 and uses the values in the table
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# ;; To write desired contents onto Tape_02
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@ -93,6 +101,8 @@ A0300040 # CMPSKIP.NE R0 64 ; @ for relative
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3C00 @a # JUMP @StoreRelativePointer
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A0300024 # CMPSKIP.NE R0 36 ; $ for absolute
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3C00 @b # JUMP @StoreAbsolutePointer
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A0300026 # CMPSKIP.NE R0 38 ; & for address
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3C00 @w # JUMP @StoreAbsoluteAddress
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# ;; Process everything else
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2D0F @7 # CALLI R15 @hex ; Attempt to Convert it
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A0100000 # CMPSKIP.GE R0 0 ; Don't record, nonhex values
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@ -115,6 +125,7 @@ A0100000 # CMPSKIP.GE R0 0 ; Don't record, nonhex values
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0FBB0001 # ADDUI R11 R11 1 ; increment PC now that that we have a full byte
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3C00 @4 # JUMP @second_pass
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# ;; Store Label function
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# ;; Writes out the token and the current PC value
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# ;; Its static variable for storing the next index to be used
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@ -140,6 +151,7 @@ A0300000 # CMPSKIP.NE R0 0 ; If zero intialize from R13
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:d
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00000000 # NOP
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# ;; StoreRelativepointer function
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# ;; Deals with the special case of relative pointers
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# ;; Clears Temp
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@ -152,7 +164,7 @@ A0300000 # CMPSKIP.NE R0 0 ; If zero intialize from R13
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:a
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# ;; Correct the PC to reflect the size of the pointer
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0FBB0002 # ADDUI R11 R11 2 ; Exactly 2 bytes
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2D200374 # LOADUI R0 $Temp ; Set where we want to shove our string
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2D2003cc # LOADUI R0 $Temp ; Set where we want to shove our string
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2D0F @f # CALLI R15 @Clear_string ; Clear it
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2D0F @e # CALLI R15 @writeout_token ; Write it
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2D0F @g # CALLI R15 @Match_string ; Find the Match
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@ -162,6 +174,7 @@ A0300000 # CMPSKIP.NE R0 0 ; If zero intialize from R13
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2D0F @h # CALLI R15 @ProcessImmediate ; Write out the value
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3C00 @4 # JUMP @second_pass
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# ;; StoreAbsolutepointer function
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# ;; Deals with the special case of absolute pointers
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# ;; Clears Temp
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@ -174,7 +187,7 @@ A0300000 # CMPSKIP.NE R0 0 ; If zero intialize from R13
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:b
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# ;; Correct the PC to reflect the size of the pointer
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0FBB0002 # ADDUI R11 R11 2 ; Exactly 2 bytes
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2D200374 # LOADUI R0 $Temp ; Set where we want to shove our string
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2D2003cc # LOADUI R0 $Temp ; Set where we want to shove our string
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2D0F @f # CALLI R15 @Clear_string ; Clear it
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2D0F @e # CALLI R15 @writeout_token ; Write it
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2D0F @g # CALLI R15 @Match_string ; Find the Match
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@ -182,6 +195,35 @@ A0300000 # CMPSKIP.NE R0 0 ; If zero intialize from R13
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2D0F @h # CALLI R15 @ProcessImmediate ; Write out the value
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3C00 @4 # JUMP @second_pass
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# ;; StoreAbsoluteAddress function
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# ;; Deal with the special case of absolute Addresses
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# ;; Clear Temp
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# ;; Stores string in Temp
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# ;; Finds match in Table
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# ;; Writes out the full absolute address [32 bit machine]
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# ;; Modifies R0 R11
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# ;; Jumpbacs back into Pass2
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# :StoreAbsoluteAddress
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# ;; COrrect the PC to reflect the size of the address
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:w
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0FBB0004 # ADDUI R11 R11 4 ; 4 Bytes on 32bit machines
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2D2003cc # LOADUI R0 $Temp ; Set where we ant to shove our string
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2D0F @f # CALLI R15 @Clear_string ; Clear it
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2D0F @e # CALLI R15 @writeout_token ; Write it
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2D0F @g # CALLI R15 @Match_string ; Find the Match
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090200EF # PUSHR R14 R15 ; Get a temp storage place
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18E0fffc # LOAD32 R14 R0 -4 ; Get the value we care about
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0900040E # COPY R0 R14 ; We need to print the top 2 bytes first
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2D400010 # SARI R0 16 ; Drop bottom 16 bits
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2D0F @h # CALLI R15 @ProcessImmediate ; Write out top 2 bytes
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2D20ffff # LOADUI R0 0xFFFF ; Provide mask to keep bottom 2 bytes
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0502000E # AND R0 R0 R14 ; Drop top 16 bits
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090280EF # POPR R14 R15 ; Restore R14
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2D0F @h # CALLI R15 @ProcessImmediate ; Write out bottom 2 bytes
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3C00 @4 # JUMP @second_pass
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# ;; Writeout Token Function
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# ;; Writes the Token [minus first char] to the address
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# ;; It recieves in R0 until it reaches a delimiter
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@ -221,6 +263,7 @@ A030000a # CMPSKIP.NE R0 10 ; Finished if newline
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# ;; And be done
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0D01001F # RET R15
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# ;; Clear string function
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# ;; Clears string pointed at by the value of R0
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# ;; Until a null character is reached
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@ -251,6 +294,7 @@ A030000a # CMPSKIP.NE R0 10 ; Finished if newline
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0902800F # POPR R0 R15
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0D01001F # RET R15
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# ;; Match string function
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# ;; Walks down table until match is found
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# ;; Then returns address of matching string in R0
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@ -261,8 +305,8 @@ A030000a # CMPSKIP.NE R0 10 ; Finished if newline
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0902001F # PUSHR R1 R15
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0902002F # PUSHR R2 R15
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# ;; Initialize for Loop
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2D210374 # LOADUI R1 $Temp ; We always compare against Temp
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2D2203b4 # LOADUI R2 $table ; Begin at start of table
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2D2103cc # LOADUI R1 $Temp ; We always compare against Temp
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2D22040c # LOADUI R2 $table ; Begin at start of table
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0F220004 # ADDUI R2 R2 4 ; Where the string is located
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# ;; Loop until we find a match
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# :Match_string_0
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@ -271,7 +315,7 @@ A030000a # CMPSKIP.NE R0 10 ; Finished if newline
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2D0F @l # CALLI R15 @strcmp
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2C50 @m # JUMP.E R0 @Match_string_1 ; It is a match!
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# ;; Prepare for next loop
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2D210374 # LOADUI R1 $Temp ; That function clears R1
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2D2103cc # LOADUI R1 $Temp ; That function clears R1
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0F220040 # ADDUI R2 R2 64 ; Each Index is 64 bytes
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3C00 @n # JUMP @Match_string_0 ; Keep looping
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# :Match_string_1
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@ -283,6 +327,7 @@ A030000a # CMPSKIP.NE R0 10 ; Finished if newline
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0902801F # POPR R1 R15
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0D01001F # RET R15
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# ;; Our simple string compare function
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# ;; Recieves two pointers in R0 and R1
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# ;; Returns the difference between the strings in R0
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@ -314,6 +359,7 @@ A0200000 # CMPSKIP.E R0 0 ; Stop if byte is NULL
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0902802F # POPR R2 R15
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0D01001F # RET R15
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# ;; Processimmediate Function
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# ;; Recieves an integer value in R0
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# ;; Writes out the values to Tape_02
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@ -343,6 +389,7 @@ A0200000 # CMPSKIP.E R0 0 ; Stop if byte is NULL
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# ;; Be Done
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0D01001F # RET R15
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# ;; ThrowAwaypointer function
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# ;; Handle the special case of a generic problem
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# ;; for Pass1, Will update R11 and modify R0
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@ -354,6 +401,19 @@ A0200000 # CMPSKIP.E R0 0 ; Stop if byte is NULL
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2D0F @p # CALLI R15 @throwAwayToken ; Get rid of rest of token
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3C00 @2 # JUMP @first_pass ; Then return to the proper place
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# ;; ThrowAwayAddress function
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# ;; Handle the case of a 32bit absolute address storage
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# ;; for Pass1, Will update R11 and modify R0
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# ;; Will return to the start of first_pass
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# ;; Never call this function, conly jump to it
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# :ThrowAwayAddress
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:v
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0FBB0004 # ADDUI R11 R11 4 ; Addresses on 32bit systems take up 4 bytes
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2D0F @p # CALLI R15 @throwAwayToken ; Get rid of rest of token
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3C00 @2 # JUMP @first_pass ; Then return to the proper place
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# ;; ThrowAwaylabel function
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# ;; Handle the special case of a generic problem
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# ;; for Pass2, Will update R11 and modify R0
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@ -385,6 +445,7 @@ A030000a # CMPSKIP.NE R0 10
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# ;; Otherwise keep looping
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3C00 @p # JUMP @throwAwayToken
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# ;; Hex function
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# ;; This function is serving three purposes:
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# ;; Identifying hex characters
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@ -444,6 +505,7 @@ A030000a # CMPSKIP.NE R0 10
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2C6E @q # JUMP.NE R14 @ascii_comment ; Otherwise keep looping
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3C00 @r # JUMP @ascii_other
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# ;; Where we are storing our Temp
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# :Temp
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:z
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@ -464,6 +526,7 @@ A030000a # CMPSKIP.NE R0 10
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00000000 # NOP
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00000000 # NOP
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# ;; Where we will putting our Table
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# :table
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:1
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