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ADD_ADDA.X68
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ADD_ADDA.X68
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*------------------------------------------------------------------------------
* Title : ADD_ADDA
* Description: Handles parsing of the ADD and ADDA ops.
*------------------------------------------------------------------------------
ORG $2040
IF_ADD_ADDA
MOVE.W A4,D3
;Get the register
AND.W #$0FFF,D3
ASL.W #3,D3
MOVE.W D3,D4
AND.L #$0000F000,D4
ROL.W #4,D4
MOVE.L D4,A4 ;register
;Get the opmode
AND.W #$0FFF,D3
ASL.W #3,D3
MOVE.W D3,D4
AND.L #$0000F000,D4
ROL.W #4,D4
MOVE.L D4,A5 ;opmode
;Get the effective mode
AND.W #$0FFF,D3
ASL.W #3,D3
MOVE.W D3,D4
AND.L #$0000F000,D4
ROL.W #4,D4
MOVE.L D4,A6 ;effective mode
;Get the effective register
AND.W #$0FFF,D3
ASL.W #3,D3
MOVE.W D3,D4
AND.L #$0000F000,D4
ROL.W #4,D4 ;effective register
MOVE.B #16,D2
MOVE.B #15,D0
BRA DISPLAY_ADD_ADDA
DISPLAY_ADD_ADDA
CMP.W #%011,A5
BEQ DISPLAY_ADDA_W
CMP.W #%111,A5
BEQ DISPLAY_ADDA_L
BRA DISPLAY_ADD
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
DISPLAY_ADDA_W
LEA ADDA_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
LEA W_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BSR GET_EFFECTIVE_ADDRESS_ea
BRA DISPLAY_ADDA_REGISTER
DISPLAY_ADDA_L
LEA ADDA_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
LEA L_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BSR GET_EFFECTIVE_ADDRESS_ea
BRA DISPLAY_ADDA_REGISTER
;subroutine;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
GET_EFFECTIVE_ADDRESS_ea
CMP.W #%000,A6
BEQ DISPLAY_Dn_ea
CMP.W #%001,A6
BEQ DISPLAY_An_ea
CMP.W #%010,A6
BEQ DISPLAY_An_ADDRESS_ea
CMP.W #%011,A6
BEQ DISPLAY_An_ADDRESS_INCREMENT_ea
CMP.W #%100,A6
BEQ DISPLAY_An_ADDRESS_DECREMENT_ea
CMP.W #%111,A6
BEQ DISPLAY_ADDRESS_OR_DATA_ea
BRA IF_INVALID_OP_EA
DISPLAY_Dn_ea
MOVE.B #D,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #16,D2
MOVE.B #15,D0
MOVE.L D4,D1
TRAP #15
RTS
DISPLAY_An_ea
MOVE.B #A,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #16,D2
MOVE.B #15,D0
MOVE.L D4,D1
TRAP #15
RTS
DISPLAY_An_ADDRESS_ea
MOVE.B #LEFT_PAR,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #A,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #16,D2
MOVE.B #15,D0
MOVE.L D4,D1
TRAP #15
MOVE.B #RIGHT_PAR,D1
MOVE.B #6,D0
TRAP #15
RTS
DISPLAY_An_ADDRESS_INCREMENT_ea
MOVE.B #LEFT_PAR,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #A,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #16,D2
MOVE.B #15,D0
MOVE.L D4,D1
TRAP #15
MOVE.B #RIGHT_PAR,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #PLUS,D1
MOVE.B #6,D0
TRAP #15
RTS
DISPLAY_An_ADDRESS_DECREMENT_ea
MOVE.B #MINUS,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #LEFT_PAR,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #A,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #16,D2
MOVE.B #15,D0
MOVE.L D4,D1
TRAP #15
MOVE.B #RIGHT_PAR,D1
MOVE.B #6,D0
TRAP #15
RTS
DISPLAY_ADDRESS_OR_DATA_ea
CMP.W #%000,D4
BEQ DISPLAY_ADDRESS_WORD_ea
CMP.W #%001,D4
BEQ DISPLAY_ADDRESS_LONG_ea
CMP.W #%100,D4
BEQ DISPLAY_DATA_ea
BRA IF_INVALID_OP_EA
DISPLAY_ADDRESS_WORD_ea
ADDQ #2,A2
MOVE.B #HEX,D1
MOVE.B #6,D0
TRAP #15
MOVE.W (A2),D1
AND.L #$0000FFFF,D1
MOVE.B #15,D0
TRAP #15
RTS
DISPLAY_ADDRESS_LONG_ea
ADDQ #2,A2
MOVE.B #HEX,D1
MOVE.B #6,D0
TRAP #15
MOVE.L (A2),D1
MOVE.B #15,D0
TRAP #15
ADDQ #2,A2
RTS
DISPLAY_DATA_ea
CMP.W #%011,A5
BEQ DISPLAY_DATA_WORD_ea
CMP.W #%111,A5
BEQ DISPLAY_DATA_LONG_ea
BRA IF_INVALID_OP_EA
DISPLAY_DATA_BYTE_ea
ADDQ #2,A2
MOVE.B #NUM,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #HEX,D1
MOVE.B #6,D0
TRAP #15
MOVE.W (A2),D1
AND.L #$000000FF,D1
MOVE.B #15,D0
TRAP #15
RTS
DISPLAY_DATA_WORD_ea
ADDQ #2,A2
MOVE.B #NUM,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #HEX,D1
MOVE.B #6,D0
TRAP #15
MOVE.W (A2),D1
AND.L #$0000FFFF,D1
MOVE.B #15,D0
TRAP #15
RTS
DISPLAY_DATA_LONG_ea
ADDQ #2,A2
MOVE.B #NUM,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #HEX,D1
MOVE.B #6,D0
TRAP #15
MOVE.L (A2),D1
MOVE.B #15,D0
TRAP #15
ADDQ #2,A2
RTS
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
DISPLAY_ADDA_REGISTER
MOVE.B #COMMA,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #A,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #16,D2
MOVE.B #15,D0
MOVE.L A4,D1
TRAP #15
BRA ITERATE
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
DISPLAY_ADD
LEA ADD_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BRA DISPLAY_ARGS
DISPLAY_ARGS
CMP.W #%000,A5
BEQ DISPLAY_BYTE_SRC
CMP.W #%001,A5
BEQ DISPLAY_WORD_SRC
CMP.W #%010,A5
BEQ DISPLAY_LONG_SRC
CMP.W #%100,A5
BEQ DISPLAY_BYTE_DEST
CMP.W #%101,A5
BEQ DISPLAY_WORD_DEST
CMP.W #%110,A5
BEQ DISPLAY_LONG_DEST
BRA IF_INVALID_SRC_DEST
DISPLAY_BYTE_SRC
LEA B_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BSR GET_EFFECTIVE_ADDRESS_ea
MOVE.B #COMMA,D1
MOVE.B #6,D0
TRAP #15
BSR DISPLAY_Dn_ADD
BRA ITERATE
DISPLAY_WORD_SRC
LEA W_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BSR GET_EFFECTIVE_ADDRESS_ea
MOVE.B #COMMA,D1
MOVE.B #6,D0
TRAP #15
BSR DISPLAY_Dn_ADD
BRA ITERATE
DISPLAY_LONG_SRC
LEA L_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BSR GET_EFFECTIVE_ADDRESS_ea
MOVE.B #COMMA,D1
MOVE.B #6,D0
TRAP #15
BSR DISPLAY_Dn_ADD
BRA ITERATE
DISPLAY_BYTE_DEST
LEA B_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BSR DISPLAY_Dn_ADD
MOVE.B #COMMA,D1
MOVE.B #6,D0
TRAP #15
BSR GET_EFFECTIVE_ADDRESS_ea_DEST
BRA ITERATE
DISPLAY_WORD_DEST
LEA W_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BSR DISPLAY_Dn_ADD
MOVE.B #COMMA,D1
MOVE.B #6,D0
TRAP #15
BSR GET_EFFECTIVE_ADDRESS_ea_DEST
BRA ITERATE
DISPLAY_LONG_DEST
LEA L_OUTPUT,A1
MOVE.B #14,D0
TRAP #15
BSR DISPLAY_Dn_ADD
MOVE.B #COMMA,D1
MOVE.B #6,D0
TRAP #15
BSR GET_EFFECTIVE_ADDRESS_ea_DEST
BRA ITERATE
DISPLAY_Dn_ADD
MOVE.B #D,D1
MOVE.B #6,D0
TRAP #15
MOVE.B #16,D2
MOVE.B #15,D0
MOVE.L A4,D1
TRAP #15
RTS
;subroutine;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
GET_EFFECTIVE_ADDRESS_ea_DEST
CMP.W #%010,A6
BEQ DISPLAY_An_ADDRESS_ea
CMP.W #%011,A6
BEQ DISPLAY_An_ADDRESS_INCREMENT_ea
CMP.W #%100,A6
BEQ DISPLAY_An_ADDRESS_DECREMENT_ea
CMP.W #%111,A6
BEQ DISPLAY_ADDRESS_OR_DATA_ea
BRA IF_INVALID_SRC_DEST
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
*~Font name~Courier New~
*~Font size~10~
*~Tab type~1~
*~Tab size~4~