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disassemblerIO.X68
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*-----------------------------------------------------------
* Title : 68k Disassembler
* Written by : Aqua Axolotols
* Date : 11/29/2020
* Description: I/O testing
*-----------------------------------------------------------
ORG $1000
START:
***
*this whole section is dedicated to I/O
*prints intro, asks user if they want to disassemble (loop)
*obtains start and end addresses, stores in memory
***
intro
LEA introMsg, A1
MOVE.B #13, D0
TRAP #15
BRA get_start_loc
disassemble_option
LEA finishedMsg, A1
MOVE.B #13, D0
TRAP #15
LEA introOptionMsg, A1
TRAP #15
MOVE.B #5, D0
TRAP #15
CMP.B #$79, D1
BNE done
LEA newLine, A1
MOVE.B #13, D0
TRAP #15
*subroutine to get and save starting location
get_start_loc
JSR clr_all_regs
LEA promptStart, A1 prompt user
MOVE.B #13, D0
TRAP #15
LEA input, A1 get input
MOVE.B #2, D0
TRAP #15
CMPI.B #8, D1 check length
BGT invalid_start
BSR ascii_to_hex convert to hex
BTST #0, D2 check last bit
BNE invalid_start
MOVE.L D2, start_loc save value
MOVE.L D2, curr_loc current location is start
*subroutine to get and save ending location
get_end_loc
MOVE.B #1, D7 keep track start or end address
CLR.L D2 make sure D2 is clear
LEA promptEND, A1 prompt user
MOVE.B #13, D0
TRAP #15
LEA input, A1 get input
MOVE.B #2, D0
TRAP #15
CMPI.B #8, D1 check length
BGT invalid_end
BSR ascii_to_hex convert to hex
BTST #0, D2 check last bit
BNE invalid_end
CMP.L start_loc, D2 make sure start < end
BLE invalid_end
MOVE.L D2, end_loc save value
JSR clr_all_regs
JMP prepare_buffer begin reading memory
*ascii to hex subroutine
ascii_to_hex
MOVE.B (A1)+, D0 one byte of input
CMP.B #$30, D0
BLT start_or_end error message depending on address
CMP.B #$39, D0
BGT ascii_to_letter
SUBI.B #$30, D0
ASL.L #4, D2
ADD.L D0, D2
SUBI.W #1, D1
BNE ascii_to_hex
RTS
*ascii to letter subroutine
ascii_to_letter
CMP.B #$41, D0
BLT start_or_end error message depending on address
CMP.B #$46, D0
BGT start_or_end error message depending on address
SUBI.B #$37, D0
ASL.L #4, D2
ADD.L D0, D2
SUBI.W #1, D1
BNE ascii_to_hex
RTS
*error message for start or end address
start_or_end
CMP.B #1, D7
BNE invalid_start
BRA invalid_end
*error message for start
invalid_start
BSR disp_error_message
BRA get_start_loc
*error message for end
invalid_end
BSR disp_error_message
BRA get_end_loc
*error message dispay
disp_error_message
LEA inputError, A1
MOVE.B #13, D0
TRAP #15
RTS
***
*end of I/O section
***
***
*the following section is where memory reading begins
***
*set line counter to 30
prepare_buffer
JSR refresh_nibbles
MOVE.B #30, line_counter
MOVE.B #11, D0 clear screen
MOVE.W #$FF00, D1
TRAP #15
*print address location
*obtain word of memory
*jump to table based on first nibble
read_memory
JSR print_memory_location
MOVE.W curr_four_nibbles, D0
ANDI.L #$0000FFFF, D0
LSR.W #8, D0
LSR.W #4, D0
MULU #6, D0
LEA FIRST_NIBBLE_TABLE, A1
JSR 0(A1, D0)
JSR print_line
JSR increment_by_word
*check if page needs to be advanced (30 lines)
advance_page_check
SUBI.B #1, line_counter
BEQ advance_page
BRA finish_disassembly
*advances page
advance_page
MOVE.B #30, line_counter
LEA promptEnter, A1
MOVE.B #13, D0
TRAP #15
MOVE.B #5, D0
TRAP #15
MOVE.B #11, D0
MOVE.W #$FF00, D1
TRAP #15
*check if ending address has been parsed
finish_disassembly
MOVE.L curr_loc, D0
MOVE.L end_loc, D1
CMP.L D1, D0
BGT disassemble_option
JMP read_memory
*subroutine to increment curr_loc
increment_by_word
MOVE.L curr_loc, D0
ADDI.L #$2, D0
MOVE.L D0, curr_loc
JSR refresh_nibbles
RTS
*subroutine to decrement curr_loc
decrement_by_word
MOVE.L curr_loc, D0
SUBI.L #$2, D0
MOVE.L D0, curr_loc
JSR refresh_nibbles
RTS
*subroutine to refresh curr_four_nibbles
refresh_nibbles
MOVE.L curr_loc, A0
MOVE.W (A0), curr_four_nibbles
RTS
***
*end of memory reading section
***
***
*beginning of parsing opword subroutines
***
*****JUMP TABLE*****
*LOOK AT FIRST FOUR BITS AND DETERMINE WHICH OPCODE TO USE
FIRST_NIBBLE_TABLE
JMP CODE0000 not supported
JMP CODE0001 MOVE.B
JMP CODE0010 MOVE.L, MOVEA.L
JMP CODE0011 MOVE.W, MOVEA.W
JMP CODE0100 NOP, JSR, LEA, MOVEM, NOT, RTS
JMP CODE0101 ADDQ
JMP CODE0110 BRA, BGT, BLE, BEQ
JMP CODE0111 MOVEQ
JMP CODE1000 OR
JMP CODE1001 SUB
JMP CODE1010 not supported
JMP CODE1011 not supported
JMP CODE1100 AND
JMP CODE1101 ADD, ADDA
JMP CODE1110 LSR, LSL, ASR, ASL, ROR, ROL
JMP CODE1111 not supported
*not supported
CODE0000
JSR print_data
RTS
*MOVE.B
CODE0001
JSR load_bit_triples
MOVEB_dest_check
MOVE.B bits6to8, D1 check dest
CMP.B #1, D1
BEQ EA_fail
CMP.B #5, D1
BEQ EA_fail
CMP.B #6, D1
BEQ EA_fail
CMP.B #7, D1
BEQ MOVEB_dest_abs_check
MOVEB_source_check
MOVE.B bits3to5, D1 check source
CMP.B #5, D1
BEQ EA_fail
CMP.B #6, D1
BEQ EA_fail
CMP.B #7, D1
BEQ MOVEB_source_abs_check
BRA MOVEB_valid
MOVEB_dest_abs_check
MOVE.B bits9to11, D1
CMP.B #1, D1
BGT CODE0001_fail
BRA MOVEB_source_check
MOVEB_source_abs_check
MOVE.B bits0to2, D1
CMP.B #1, D1
BLE MOVEB_valid
CMP.B #4, D1
BEQ MOVEB_valid
BRA CODE0001_fail
MOVEB_valid
JSR print_MOVE
JSR print_B
MOVE.B bits3to5, D1
ANDI.L #%111, D1
MULU #6, D1
LEA MOVEB_source_table, A2
JSR 0(A2, D1)
JSR print_comma
MOVE.B bits6to8, D1
ANDI.L #%111, D1
MULU #6, D1
LEA MOVEB_dest_table, A2
JSR 0(A2, D1)
RTS
MOVEB_source_table
JMP MOVEB_source_000
JMP MOVEB_source_001
JMP MOVEB_source_010
JMP MOVEB_source_011
JMP MOVEB_source_100
JMP MOVEB_source_101
JMP MOVEB_source_110
JMP MOVEB_source_111
MOVEB_source_000
JSR print_D
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEB_source_001
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEB_source_010
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEB_source_011
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
JSR print_plus
RTS
MOVEB_source_100
JSR print_minus
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEB_source_101
BRA CODE0001_fail should be inaccessible
MOVEB_source_110
BRA CODE0001_fail should be inaccessible
MOVEB_source_111
MOVE.B bits0to2, D1
CMP.B #0, D1
BEQ MOVEB_source_111_W
CMP.B #1, D1
BEQ MOVEB_source_111_L
CMP.B #4, D1
BEQ MOVEB_source_111_I
BRA CODE0001_fail should be inaccessible
MOVEB_source_111_W
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEB_source_111_L
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
MOVEB_source_111_I
JSR print_hashtag
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEB_dest_table
JMP MOVEB_dest_000
JMP MOVEB_dest_001
JMP MOVEB_dest_010
JMP MOVEB_dest_011
JMP MOVEB_dest_100
JMP MOVEB_dest_101
JMP MOVEB_dest_110
JMP MOVEB_dest_111
MOVEB_dest_000
JSR print_D
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEB_dest_001
BRA EA_fail
MOVEB_dest_010
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEB_dest_011
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
JSR print_plus
RTS
MOVEB_dest_100
JSR print_minus
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEB_dest_101
BRA CODE0001_fail should be inaccessible
MOVEB_dest_110
BRA CODE0001_fail should be inaccessible
MOVEB_dest_111
MOVE.B bits9to11, D1
CMP.B #0, D1
BEQ MOVEB_dest_111_W
CMP.B #1, D1
BEQ MOVEB_dest_111_L
BRA CODE0001_fail should be inaccessible
MOVEB_dest_111_W
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEB_dest_111_L
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
CODE0001_fail
JSR print_data
RTS
*MOVE.L, MOVEA.L
CODE0010
JSR load_bit_triples
MOVEL_dest_check
MOVE.B bits6to8, D1 check dest
CMP.B #1, D1
BEQ MOVEAL_check
CMP.B #5, D1
BEQ EA_fail
CMP.B #6, D1
BEQ EA_fail
CMP.B #7, D1
BEQ MOVEL_dest_abs_check
MOVEL_source_check
MOVE.B bits3to5, D1 check source
CMP.B #5, D1
BEQ EA_fail
CMP.B #6, D1
BEQ EA_fail
CMP.B #7, D1
BEQ MOVEL_source_abs_check
BRA MOVEL_valid
MOVEL_dest_abs_check
MOVE.B bits9to11, D1
CMP.B #1, D1
BGT CODE0010_fail
BRA MOVEL_source_check
MOVEL_source_abs_check
MOVE.B bits0to2, D1
CMP.B #1, D1
BLE MOVEL_valid
CMP.B #4, D1
BEQ MOVEL_valid
BRA CODE0010_fail
MOVEL_valid
JSR print_MOVE
JSR print_L
MOVE.B bits3to5, D1
ANDI.L #%111, D1
MULU #6, D1
LEA MOVEL_source_table, A2
JSR 0(A2, D1)
JSR print_comma
MOVE.B bits6to8, D1
ANDI.L #%111, D1
MULU #6, D1
LEA MOVEL_dest_table, A2
JSR 0(A2, D1)
RTS
MOVEL_source_table
JMP MOVEL_source_000
JMP MOVEL_source_001
JMP MOVEL_source_010
JMP MOVEL_source_011
JMP MOVEL_source_100
JMP MOVEL_source_101
JMP MOVEL_source_110
JMP MOVEL_source_111
MOVEL_source_000
JSR print_D
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEL_source_001
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEL_source_010
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEL_source_011
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
JSR print_plus
RTS
MOVEL_source_100
JSR print_minus
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEL_source_101
BRA CODE0010_fail should be inaccessible
MOVEL_source_110
BRA CODE0010_fail should be inaccessible
MOVEL_source_111
MOVE.B bits0to2, D1
CMP.B #0, D1
BEQ MOVEL_source_111_W
CMP.B #1, D1
BEQ MOVEL_source_111_L
CMP.B #4, D1
BEQ MOVEL_source_111_I
BRA CODE0010_fail should be inaccessible
MOVEL_source_111_W
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEL_source_111_L
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
MOVEL_source_111_I
JSR print_hashtag
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
MOVEL_dest_table
JMP MOVEL_dest_000
JMP MOVEL_dest_001
JMP MOVEL_dest_010
JMP MOVEL_dest_011
JMP MOVEL_dest_100
JMP MOVEL_dest_101
JMP MOVEL_dest_110
JMP MOVEL_dest_111
MOVEL_dest_000
JSR print_D
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEL_dest_001
BRA CODE0010_fail
MOVEL_dest_010
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEL_dest_011
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
JSR print_plus
RTS
MOVEL_dest_100
JSR print_minus
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEL_dest_101
BRA CODE0010_fail should be inaccessible
MOVEL_dest_110
BRA CODE0010_fail should be inaccessible
MOVEL_dest_111
MOVE.B bits9to11, D1
CMP.B #0, D1
BEQ MOVEL_dest_111_W
CMP.B #1, D1
BEQ MOVEL_dest_111_L
BRA CODE0010_fail should be inaccessible
MOVEL_dest_111_W
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEL_dest_111_L
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
MOVEAL_check
MOVE.B bits3to5, D1 check source
CMP.B #5, D1
BEQ EA_fail
CMP.B #6, D1
BEQ EA_fail
CMP.B #7, D1
BEQ MOVEAL_abs_check
BRA MOVEAL_valid
MOVEAL_abs_check
MOVE.B bits0to2, D1
CMP.B #1, D1
BLE MOVEAL_valid
CMP.B #4, D1
BEQ MOVEAL_valid
BRA CODE0010_fail
MOVEAL_valid
JSR print_MOVEA
JSR print_L
MOVE.B bits3to5, D1
ANDI.L #%111, D1
MULU #6, D1
LEA MOVEAL_EA_table, A2
JSR 0(A2, D1)
JSR print_comma
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEAL_EA_table
JMP MOVEAL_EA_000
JMP MOVEAL_EA_001
JMP MOVEAL_EA_010
JMP MOVEAL_EA_011
JMP MOVEAL_EA_100
JMP MOVEAL_EA_101
JMP MOVEAL_EA_110
JMP MOVEAL_EA_111
MOVEAL_EA_000
JSR print_D
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEAL_EA_001
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEAL_EA_010
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEAL_EA_011
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
JSR print_plus
RTS
MOVEAL_EA_100
JSR print_minus
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEAL_EA_101
BRA CODE0010_fail should be inaccessible
MOVEAL_EA_110
BRA CODE0010_fail should be inaccessible
MOVEAL_EA_111
MOVE.B bits0to2, D1
CMP.B #0, D1
BEQ MOVEAL_111_W
CMP.B #1, D1
BEQ MOVEAL_111_L
CMP.B #4, D1
BEQ MOVEAL_111_I
BRA CODE0010_fail should be inaccessible
MOVEAL_111_W
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEAL_111_L
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
MOVEAL_111_I
JSR print_hashtag
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
CODE0010_fail
JSR print_data
RTS
*MOVE.W, MOVEA.W
CODE0011
JSR load_bit_triples
MOVEW_dest_check
MOVE.B bits6to8, D1 check dest
CMP.B #1, D1
BEQ MOVEAW_check
CMP.B #5, D1
BEQ EA_fail
CMP.B #6, D1
BEQ EA_fail
CMP.B #7, D1
BEQ MOVEW_dest_abs_check
MOVEW_source_check
MOVE.B bits3to5, D1 check source
CMP.B #5, D1
BEQ EA_fail
CMP.B #6, D1
BEQ EA_fail
CMP.B #7, D1
BEQ MOVEW_source_abs_check
BRA MOVEW_valid
MOVEW_dest_abs_check
MOVE.B bits9to11, D1
CMP.B #1, D1
BGT CODE0011_fail
BRA MOVEW_source_check
MOVEW_source_abs_check
MOVE.B bits0to2, D1
CMP.B #1, D1
BLE MOVEW_valid
CMP.B #4, D1
BEQ MOVEW_valid
BRA CODE0011_fail
MOVEW_valid
JSR print_MOVE
JSR print_W
MOVE.B bits3to5, D1
ANDI.L #%111, D1
MULU #6, D1
LEA MOVEW_source_table, A2
JSR 0(A2, D1)
JSR print_comma
MOVE.B bits6to8, D1
ANDI.L #%111, D1
MULU #6, D1
LEA MOVEW_dest_table, A2
JSR 0(A2, D1)
RTS
MOVEW_source_table
JMP MOVEW_source_000
JMP MOVEW_source_001
JMP MOVEW_source_010
JMP MOVEW_source_011
JMP MOVEW_source_100
JMP MOVEW_source_101
JMP MOVEW_source_110
JMP MOVEW_source_111
MOVEW_source_000
JSR print_D
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEW_source_001
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEW_source_010
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEW_source_011
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
JSR print_plus
RTS
MOVEW_source_100
JSR print_minus
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEW_source_101
BRA CODE0011_fail should be inaccessible
MOVEW_source_110
BRA CODE0011_fail should be inaccessible
MOVEW_source_111
MOVE.B bits0to2, D1
CMP.B #0, D1
BEQ MOVEW_source_111_W
CMP.B #1, D1
BEQ MOVEW_source_111_L
CMP.B #4, D1
BEQ MOVEW_source_111_I
BRA CODE0011_fail should be inaccessible
MOVEW_source_111_W
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEW_source_111_L
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
MOVEW_source_111_I
JSR print_hashtag
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEW_dest_table
JMP MOVEW_dest_000
JMP MOVEW_dest_001
JMP MOVEW_dest_010
JMP MOVEW_dest_011
JMP MOVEW_dest_100
JMP MOVEW_dest_101
JMP MOVEW_dest_110
JMP MOVEW_dest_111
MOVEW_dest_000
JSR print_D
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEW_dest_001
BRA CODE0011_fail
MOVEW_dest_010
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEW_dest_011
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
JSR print_plus
RTS
MOVEW_dest_100
JSR print_minus
JSR print_open_paren
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEW_dest_101
BRA CODE0011_fail should be inaccessible
MOVEW_dest_110
BRA CODE0011_fail should be inaccessible
MOVEW_dest_111
MOVE.B bits9to11, D1
CMP.B #0, D1
BEQ MOVEW_dest_111_W
CMP.B #1, D1
BEQ MOVEW_dest_111_L
BRA CODE0011_fail should be inaccessible
MOVEW_dest_111_W
JSR print_$
JSR increment_by_word
JSR print_word_of_data
RTS
MOVEW_dest_111_L
JSR print_$
JSR increment_by_word
JSR print_longword_of_data
RTS
MOVEAW_check
MOVE.B bits3to5, D1 check source
CMP.B #5, D1
BEQ EA_fail
CMP.B #6, D1
BEQ EA_fail
CMP.B #7, D1
BEQ MOVEAW_abs_check
BRA MOVEAW_valid
MOVEAW_abs_check
MOVE.B bits0to2, D1
CMP.B #1, D1
BLE MOVEAW_valid
CMP.B #4, D1
BEQ MOVEAW_valid
BRA CODE0011_fail
MOVEAW_valid
JSR print_MOVEA
JSR print_W
MOVE.B bits3to5, D1
ANDI.L #%111, D1
MULU #6, D1
LEA MOVEAW_EA_table, A2
JSR 0(A2, D1)
JSR print_comma
JSR print_A
MOVE.B bits9to11, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEAW_EA_table
JMP MOVEAW_EA_000
JMP MOVEAW_EA_001
JMP MOVEAW_EA_010
JMP MOVEAW_EA_011
JMP MOVEAW_EA_100
JMP MOVEAW_EA_101
JMP MOVEAW_EA_110
JMP MOVEAW_EA_111
MOVEAW_EA_000
JSR print_D
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEAW_EA_001
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
RTS
MOVEAW_EA_010
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
RTS
MOVEAW_EA_011
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1
JSR hex_to_ascii
JSR print_char_of_D1
JSR print_close_paren
JSR print_plus
RTS
MOVEAW_EA_100
JSR print_minus
JSR print_open_paren
JSR print_A
MOVE.B bits0to2, D1