mirror of
https://github.com/lscharen/iigs-game-engine.git
synced 2025-02-16 10:32:20 +00:00
Inline all functions that are only called once
Eliminates the JSR/RTS overhead for the copy functions. Combined with the other streamlining, we save around 60 - 70 cycles per bank, or a total savings of around 10,000 cycles per seconds when running at full screen. This doesn't really change the FPS, but just gives some cycles back to the main application logic.
This commit is contained in:
Lucas Scharenbroich
parent
dedb657546
commit
456744027d
@ -63,8 +63,7 @@ _RestoreBG0Opcodes
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tya
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adc :exit_offset ; Add some offsets to get the base address in the code field line
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jmp (:tgt,x)
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:tgt RestoreOpcode
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RestoreOpcode
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lda :lines_left_x2 ; subtract the number of lines we just completed
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sec
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@ -323,12 +322,12 @@ _ApplyBG0XPos
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sta :virt_line_x2
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lda :exit_address ; Save from this location
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jsr (SaveOpcode,x) ; X = :exit_address on return
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SaveOpcode ; X = :exit_address on return
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txy ; ldy :exit_address -- starting at this address
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ldx :draw_count_x2 ; Do this many lines
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lda :exit_bra ; Copy this value into all of the lines
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jsr (SetConst,x) ; All registers are preserved
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SetConst ; All registers are preserved
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; Next, patch in the CODE_ENTRY value, which is the low byte of a JMP instruction. This is an
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; 8-bit operation and, since the PEA code is bank aligned, we use the entry_offset value directly
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@ -337,21 +336,20 @@ _ApplyBG0XPos
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lda :entry_offset
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ldy :base_address
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jsr (SetCodeEntry,x) ; All registers are preserved
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SetCodeEntry ; All registers are preserved
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; Now, patch in the opcode
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lda :opcode
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jsr (SetCodeEntryOpcode,x) ; All registers are preserved
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SetCodeEntryOpcode ; All registers are preserved
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; If this is an odd entry, also set the odd_entry low byte and save the operand high byte
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lda :odd_entry_offset
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beq :not_odd
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jeq :not_odd
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jsr (SetOddCodeEntry,x) ; All registers are preserved
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jmp (:SaveHighOperand,x) ; Only used once, so "inline" it
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:save_high_op_rtn
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SetOddCodeEntry ; All registers are preserved
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SaveHighOperand :exit_address ; Only used once, so "inline" it
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:not_odd
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rep #$21 ; clear the carry
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@ -379,77 +377,78 @@ _ApplyBG0XPos
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; X = number of lines * 2, 0 to 32
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; Y = starting line * $1000
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; A = code field location * $1000
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:SaveHighOperand
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da :bottom
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da :do01,:do02,:do03,:do04
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da :do05,:do06,:do07,:do08
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da :do09,:do10,:do11,:do12
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da :do13,:do14,:do15,:do16
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SaveHighOperand mac
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jmp (dispTbl,x)
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dispTbl da bottom
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da do01,do02,do03,do04
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da do05,do06,do07,do08
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da do09,do10,do11,do12
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da do13,do14,do15,do16
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:do15 ldx :exit_address ; accumulator is in 8-bit mode, so can't use TAX
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bra :x15
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:do14 ldx :exit_address
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bra :x14
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:do13 ldx :exit_address
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bra :x13
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:do12 ldx :exit_address
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bra :x12
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:do11 ldx :exit_address
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bra :x11
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:do10 ldx :exit_address
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bra :x10
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:do09 ldx :exit_address
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bra :x09
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:do08 ldx :exit_address
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bra :x08
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:do07 ldx :exit_address
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bra :x07
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:do06 ldx :exit_address
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bra :x06
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:do05 ldx :exit_address
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bra :x05
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:do04 ldx :exit_address
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bra :x04
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:do03 ldx :exit_address
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bra :x03
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:do02 ldx :exit_address
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bra :x02
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:do01 ldx :exit_address
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bra :x01
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:do16 ldx :exit_address
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:x16 lda $F002,x
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do15 ldx ]1 ; accumulator is in 8-bit mode, so can't use TAX
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bra x15
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do14 ldx ]1
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bra x14
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do13 ldx ]1
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bra x13
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do12 ldx ]1
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bra x12
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do11 ldx ]1
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bra x11
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do10 ldx ]1
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bra x10
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do09 ldx ]1
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bra x09
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do08 ldx ]1
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bra x08
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do07 ldx ]1
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bra x07
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do06 ldx ]1
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bra x06
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do05 ldx ]1
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bra x05
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do04 ldx ]1
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bra x04
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do03 ldx ]1
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bra x03
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do02 ldx ]1
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bra x02
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do01 ldx ]1
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bra x01
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do16 ldx ]1
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x16 lda $F002,x
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sta OPCODE_HIGH_SAVE+$F000,y
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:x15 lda $E002,x
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x15 lda $E002,x
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sta OPCODE_HIGH_SAVE+$E000,y
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:x14 lda $D002,x
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x14 lda $D002,x
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sta OPCODE_HIGH_SAVE+$D000,y
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:x13 lda $C002,x
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x13 lda $C002,x
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sta OPCODE_HIGH_SAVE+$C000,y
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:x12 lda $B002,x
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x12 lda $B002,x
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sta OPCODE_HIGH_SAVE+$B000,y
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:x11 lda $A002,x
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x11 lda $A002,x
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sta OPCODE_HIGH_SAVE+$A000,y
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:x10 lda $9002,x
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x10 lda $9002,x
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sta OPCODE_HIGH_SAVE+$9000,y
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:x09 lda $8002,x
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x09 lda $8002,x
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sta OPCODE_HIGH_SAVE+$8000,y
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:x08 lda $7002,x
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x08 lda $7002,x
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sta OPCODE_HIGH_SAVE+$7000,y
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:x07 lda $6002,x
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x07 lda $6002,x
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sta OPCODE_HIGH_SAVE+$6000,y
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:x06 lda $5002,x
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x06 lda $5002,x
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sta OPCODE_HIGH_SAVE+$5000,y
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:x05 lda $4002,x
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x05 lda $4002,x
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sta OPCODE_HIGH_SAVE+$4000,y
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:x04 lda $3002,x
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x04 lda $3002,x
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sta OPCODE_HIGH_SAVE+$3000,y
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:x03 lda $2002,x
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x03 lda $2002,x
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sta OPCODE_HIGH_SAVE+$2000,y
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:x02 lda $1002,x
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x02 lda $1002,x
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sta OPCODE_HIGH_SAVE+$1000,y
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:x01 lda: $0002,x
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x01 lda: $0002,x
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sta: OPCODE_HIGH_SAVE+$0000,y
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:bottom jmp :save_high_op_rtn
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bottom <<<
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; SaveOpcode
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;
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@ -459,77 +458,79 @@ _ApplyBG0XPos
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; X = number of lines * 2, 0 to 32
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; Y = starting line * $1000
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; A = code field location * $1000
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SaveOpcode
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da :bottom
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da :do01,:do02,:do03,:do04
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da :do05,:do06,:do07,:do08
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da :do09,:do10,:do11,:do12
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da :do13,:do14,:do15,:do16
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SaveOpcode mac
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jmp (dispTbl,x)
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dispTbl da bottom
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da do01,do02,do03,do04
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da do05,do06,do07,do08
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da do09,do10,do11,do12
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da do13,do14,do15,do16
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:do15 tax
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bra :x15
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:do14 tax
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bra :x14
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:do13 tax
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bra :x13
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:do12 tax
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bra :x12
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:do11 tax
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bra :x11
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:do10 tax
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bra :x10
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:do09 tax
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bra :x09
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:do08 tax
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bra :x08
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:do07 tax
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bra :x07
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:do06 tax
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bra :x06
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:do05 tax
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bra :x05
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:do04 tax
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bra :x04
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:do03 tax
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bra :x03
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:do02 tax
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bra :x02
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:do01 tax
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bra :x01
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:do16 tax
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:x16 lda $F000,x
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do15 tax
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bra x15
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do14 tax
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bra x14
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do13 tax
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bra x13
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do12 tax
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bra x12
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do11 tax
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bra x11
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do10 tax
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bra x10
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do09 tax
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bra x09
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do08 tax
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bra x08
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do07 tax
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bra x07
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do06 tax
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bra x06
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do05 tax
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bra x05
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do04 tax
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bra x04
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do03 tax
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bra x03
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do02 tax
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bra x02
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do01 tax
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bra x01
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do16 tax
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x16 lda $F000,x
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sta OPCODE_SAVE+$F000,y
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:x15 lda $E000,x
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x15 lda $E000,x
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sta OPCODE_SAVE+$E000,y
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:x14 lda $D000,x
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x14 lda $D000,x
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sta OPCODE_SAVE+$D000,y
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:x13 lda $C000,x
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x13 lda $C000,x
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sta OPCODE_SAVE+$C000,y
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:x12 lda $B000,x
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x12 lda $B000,x
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sta OPCODE_SAVE+$B000,y
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:x11 lda $A000,x
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x11 lda $A000,x
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sta OPCODE_SAVE+$A000,y
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:x10 lda $9000,x
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x10 lda $9000,x
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sta OPCODE_SAVE+$9000,y
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:x09 lda $8000,x
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x09 lda $8000,x
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sta OPCODE_SAVE+$8000,y
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:x08 lda $7000,x
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x08 lda $7000,x
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sta OPCODE_SAVE+$7000,y
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:x07 lda $6000,x
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x07 lda $6000,x
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sta OPCODE_SAVE+$6000,y
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:x06 lda $5000,x
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x06 lda $5000,x
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sta OPCODE_SAVE+$5000,y
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:x05 lda $4000,x
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x05 lda $4000,x
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sta OPCODE_SAVE+$4000,y
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:x04 lda $3000,x
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x04 lda $3000,x
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sta OPCODE_SAVE+$3000,y
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:x03 lda $2000,x
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x03 lda $2000,x
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sta OPCODE_SAVE+$2000,y
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:x02 lda $1000,x
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x02 lda $1000,x
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sta OPCODE_SAVE+$1000,y
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:x01 lda: $0000,x
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x01 lda: $0000,x
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sta: OPCODE_SAVE+$0000,y
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:bottom rts
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bottom
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<<<
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; RestoreOpcode
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;
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@ -539,7 +540,8 @@ SaveOpcode
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; Y = starting line * $1000
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; A = code field location * $1000
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RestoreOpcode mac
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da bottom
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jmp (dispTbl,x)
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dispTbl da bottom
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da do01,do02,do03,do04
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da do05,do06,do07,do08
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da do09,do10,do11,do12
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@ -618,13 +620,14 @@ bottom
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; X = number of lines * 2, 0 to 32
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; Y = starting line * $1000
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; A = address low byte
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SetCodeEntry
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da :bottom-00,:bottom-03,:bottom-06,:bottom-09
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da :bottom-12,:bottom-15,:bottom-18,:bottom-21
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da :bottom-24,:bottom-27,:bottom-30,:bottom-33
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da :bottom-36,:bottom-39,:bottom-42,:bottom-45
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da :bottom-48
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:top sta CODE_ENTRY+$F000,y
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SetCodeEntry mac
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jmp (dispTbl,x)
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dispTbl da bottom-00,bottom-03,bottom-06,bottom-09
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da bottom-12,bottom-15,bottom-18,bottom-21
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da bottom-24,bottom-27,bottom-30,bottom-33
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da bottom-36,bottom-39,bottom-42,bottom-45
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da bottom-48
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sta CODE_ENTRY+$F000,y
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sta CODE_ENTRY+$E000,y
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sta CODE_ENTRY+$D000,y
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sta CODE_ENTRY+$C000,y
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@ -640,7 +643,8 @@ SetCodeEntry
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sta CODE_ENTRY+$2000,y
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sta CODE_ENTRY+$1000,y
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sta: CODE_ENTRY+$0000,y
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:bottom rts
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bottom
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<<<
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; SetOddCodeEntry
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;
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@ -649,13 +653,14 @@ SetCodeEntry
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; X = number of lines * 2, 0 to 32
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; Y = starting line * $1000
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; A = address low byte
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SetOddCodeEntry
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da :bottom-00,:bottom-03,:bottom-06,:bottom-09
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da :bottom-12,:bottom-15,:bottom-18,:bottom-21
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da :bottom-24,:bottom-27,:bottom-30,:bottom-33
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da :bottom-36,:bottom-39,:bottom-42,:bottom-45
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da :bottom-48
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:top sta ODD_ENTRY+$F000,y
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SetOddCodeEntry mac
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jmp (dispTbl,x)
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dispTbl da bottom-00,bottom-03,bottom-06,bottom-09
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da bottom-12,bottom-15,bottom-18,bottom-21
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da bottom-24,bottom-27,bottom-30,bottom-33
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da bottom-36,bottom-39,bottom-42,bottom-45
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da bottom-48
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sta ODD_ENTRY+$F000,y
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sta ODD_ENTRY+$E000,y
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sta ODD_ENTRY+$D000,y
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sta ODD_ENTRY+$C000,y
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@ -671,7 +676,8 @@ SetOddCodeEntry
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sta ODD_ENTRY+$2000,y
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sta ODD_ENTRY+$1000,y
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sta: ODD_ENTRY+$0000,y
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:bottom rts
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bottom
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<<<
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; SetCodeEntryOpcode
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;
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@ -680,13 +686,14 @@ SetOddCodeEntry
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; X = number of lines * 2, 0 to 32
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; Y = starting line * $1000
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; A = opcode value
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SetCodeEntryOpcode
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da :bottom-00,:bottom-03,:bottom-06,:bottom-09
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da :bottom-12,:bottom-15,:bottom-18,:bottom-21
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da :bottom-24,:bottom-27,:bottom-30,:bottom-33
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da :bottom-36,:bottom-39,:bottom-42,:bottom-45
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da :bottom-48
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:top sta CODE_ENTRY_OPCODE+$F000,y
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SetCodeEntryOpcode mac
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jmp (dispTbl,x)
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dispTbl da bottom-00,bottom-03,bottom-06,bottom-09
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da bottom-12,bottom-15,bottom-18,bottom-21
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da bottom-24,bottom-27,bottom-30,bottom-33
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da bottom-36,bottom-39,bottom-42,bottom-45
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da bottom-48
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sta CODE_ENTRY_OPCODE+$F000,y
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sta CODE_ENTRY_OPCODE+$E000,y
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sta CODE_ENTRY_OPCODE+$D000,y
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sta CODE_ENTRY_OPCODE+$C000,y
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@ -702,4 +709,5 @@ SetCodeEntryOpcode
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sta CODE_ENTRY_OPCODE+$2000,y
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sta CODE_ENTRY_OPCODE+$1000,y
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sta: CODE_ENTRY_OPCODE+$0000,y
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:bottom rts
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bottom
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<<<
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@ -87,13 +87,14 @@ Counter equ tmp3
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; A = value
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;
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; Set M to 0 or 1
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SetConst
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da :bottom-00,:bottom-03,:bottom-06,:bottom-09
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da :bottom-12,:bottom-15,:bottom-18,:bottom-21
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da :bottom-24,:bottom-27,:bottom-30,:bottom-33
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da :bottom-36,:bottom-39,:bottom-42,:bottom-45
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da :bottom-48
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:top sta $F000,y
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SetConst mac
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jmp (dispTbl,x)
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dispTbl da bottom-00,bottom-03,bottom-06,bottom-09
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da bottom-12,bottom-15,bottom-18,bottom-21
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da bottom-24,bottom-27,bottom-30,bottom-33
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da bottom-36,bottom-39,bottom-42,bottom-45
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da bottom-48
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sta $F000,y
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sta $E000,y
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sta $D000,y
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sta $C000,y
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@ -109,7 +110,8 @@ SetConst
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sta $2000,y
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sta $1000,y
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sta: $0000,y
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:bottom rts
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bottom
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<<<
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; SetDPAddrs
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;
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@ -69,13 +69,12 @@ _ApplyBG0YPos
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sta :virt_line_x2
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plb
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jsr (:CopyRTableToStkAddr,x) ; X = rtbl_idx_x2 on return
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CopyRTableToStkAddr :rtbl_idx_x2 ; X = rtbl_idx_x2 on return
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||||
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||||
txa ; carry flag is unchanged
|
||||
adc :draw_count_x2 ; advance the index into the RTable
|
||||
sta :rtbl_idx_x2
|
||||
|
||||
|
||||
lda :lines_left_x2 ; subtract the number of lines we just completed
|
||||
sec
|
||||
sbc :draw_count_x2
|
||||
@ -93,73 +92,75 @@ _ApplyBG0YPos
|
||||
; A = intect into the RTable array (x2)
|
||||
; Y = starting line * $1000
|
||||
; X = number of lines (x2)
|
||||
:CopyRTableToStkAddr
|
||||
da :none
|
||||
da :do01,:do02,:do03,:do04
|
||||
da :do05,:do06,:do07,:do08
|
||||
da :do09,:do10,:do11,:do12
|
||||
da :do13,:do14,:do15,:do16
|
||||
:do15 ldx :rtbl_idx_x2
|
||||
bra :x15
|
||||
:do14 ldx :rtbl_idx_x2
|
||||
bra :x14
|
||||
:do13 ldx :rtbl_idx_x2
|
||||
bra :x13
|
||||
:do12 ldx :rtbl_idx_x2
|
||||
bra :x12
|
||||
:do11 ldx :rtbl_idx_x2
|
||||
bra :x11
|
||||
:do10 ldx :rtbl_idx_x2
|
||||
bra :x10
|
||||
:do09 ldx :rtbl_idx_x2
|
||||
bra :x09
|
||||
:do08 ldx :rtbl_idx_x2
|
||||
bra :x08
|
||||
:do07 ldx :rtbl_idx_x2
|
||||
bra :x07
|
||||
:do06 ldx :rtbl_idx_x2
|
||||
bra :x06
|
||||
:do05 ldx :rtbl_idx_x2
|
||||
bra :x05
|
||||
:do04 ldx :rtbl_idx_x2
|
||||
bra :x04
|
||||
:do03 ldx :rtbl_idx_x2
|
||||
bra :x03
|
||||
:do02 ldx :rtbl_idx_x2
|
||||
bra :x02
|
||||
:do01 ldx :rtbl_idx_x2
|
||||
bra :x01
|
||||
:do16 ldx :rtbl_idx_x2
|
||||
CopyRTableToStkAddr mac
|
||||
jmp (dispTbl,x)
|
||||
dispTbl da bottom
|
||||
da do01,do02,do03,do04
|
||||
da do05,do06,do07,do08
|
||||
da do09,do10,do11,do12
|
||||
da do13,do14,do15,do16
|
||||
do15 ldx ]1
|
||||
bra x15
|
||||
do14 ldx ]1
|
||||
bra x14
|
||||
do13 ldx ]1
|
||||
bra x13
|
||||
do12 ldx ]1
|
||||
bra x12
|
||||
do11 ldx ]1
|
||||
bra x11
|
||||
do10 ldx ]1
|
||||
bra x10
|
||||
do09 ldx ]1
|
||||
bra x09
|
||||
do08 ldx ]1
|
||||
bra x08
|
||||
do07 ldx ]1
|
||||
bra x07
|
||||
do06 ldx ]1
|
||||
bra x06
|
||||
do05 ldx ]1
|
||||
bra x05
|
||||
do04 ldx ]1
|
||||
bra x04
|
||||
do03 ldx ]1
|
||||
bra x03
|
||||
do02 ldx ]1
|
||||
bra x02
|
||||
do01 ldx ]1
|
||||
bra x01
|
||||
do16 ldx ]1
|
||||
ldal RTable+30,x
|
||||
sta STK_ADDR+$F000,y
|
||||
:x15 ldal RTable+28,x
|
||||
x15 ldal RTable+28,x
|
||||
sta STK_ADDR+$E000,y
|
||||
:x14 ldal RTable+26,x
|
||||
x14 ldal RTable+26,x
|
||||
sta STK_ADDR+$D000,y
|
||||
:x13 ldal RTable+24,x
|
||||
x13 ldal RTable+24,x
|
||||
sta STK_ADDR+$C000,y
|
||||
:x12 ldal RTable+22,x
|
||||
x12 ldal RTable+22,x
|
||||
sta STK_ADDR+$B000,y
|
||||
:x11 ldal RTable+20,x
|
||||
x11 ldal RTable+20,x
|
||||
sta STK_ADDR+$A000,y
|
||||
:x10 ldal RTable+18,x
|
||||
x10 ldal RTable+18,x
|
||||
sta STK_ADDR+$9000,y
|
||||
:x09 ldal RTable+16,x
|
||||
x09 ldal RTable+16,x
|
||||
sta STK_ADDR+$8000,y
|
||||
:x08 ldal RTable+14,x
|
||||
x08 ldal RTable+14,x
|
||||
sta STK_ADDR+$7000,y
|
||||
:x07 ldal RTable+12,x
|
||||
x07 ldal RTable+12,x
|
||||
sta STK_ADDR+$6000,y
|
||||
:x06 ldal RTable+10,x
|
||||
x06 ldal RTable+10,x
|
||||
sta STK_ADDR+$5000,y
|
||||
:x05 ldal RTable+08,x
|
||||
x05 ldal RTable+08,x
|
||||
sta STK_ADDR+$4000,y
|
||||
:x04 ldal RTable+06,x
|
||||
x04 ldal RTable+06,x
|
||||
sta STK_ADDR+$3000,y
|
||||
:x03 ldal RTable+04,x
|
||||
x03 ldal RTable+04,x
|
||||
sta STK_ADDR+$2000,y
|
||||
:x02 ldal RTable+02,x
|
||||
x02 ldal RTable+02,x
|
||||
sta STK_ADDR+$1000,y
|
||||
:x01 ldal RTable+00,x
|
||||
x01 ldal RTable+00,x
|
||||
sta: STK_ADDR+$0000,y
|
||||
:none rts
|
||||
bottom
|
||||
<<<
|
||||
Loading…
x
Reference in New Issue
Block a user