ed: I have a bad feeling about this
This commit is contained in:
Vince Weaver
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˙˙l˙˙˙`˙˙˙P˙`˙l˙`˙l˙ä˙ l˙ä˙˙˙l˙˙˙`˙˙˙P˙`˙l˙`˙l˙ä˙ l äŔlŘfŘlŘPŘlŘH˙P˙V˙`˙ V˙`˙lŘPŘlŘPŘPlPH PPHPPrV6V0`+`(V$V?V9V`˙l˙`˙P`l`lä lä˙l˙`˙P`l`lä lälPlPlHPV` V`lPlPlH P P V ` V ` ˙˙?˙ä lVVV äää
lllä
˙ <1C><18><12> <0C> <1C><12>6
<12>$˙ <1C> <1C><>
˙ ˙˙?˙ä lVVV äää
lllä
˙ <1C><18><12> <0C> <1C><12>6
<12>$˙ <1C> <1C><>
˙?˙9˙˙Ŕ¬9<>˙˙˙˙˙0˙˙Ŕ¬9<>˙9˙?˙&ä9`V?˙9˙˙Ŕ¬9<>˙˙˙˙˙˙?˙&Ŕ9¬<18>˙?˙$˙?˙˙˙˙Ŕ¬<18>˙˙ ˙ ˙ ˙˙˙ ˙Ŕ¬<18>˙˙˙9ä`V˙˙˙Ŕ¬<18>˙˙˙ ˙˙˙˙˙˙9Ŕ¬<15>˙˙9˙˙$$<24>?<3F>9<>9˙9äHl$<12> <1F> <1C> ˙ äH
l$?˙9˙ ˙ ä lH`$ ˙ ˙˙ Ř< ä`$ `l ll ```lll ``$`lll`˙lŘä<18>?˙$˙˙˙˙˙˙˙˙9˙?˙ 9˙$˙$?˙$˙?˙9˙?˙?ä?l?r$0`+`+l$(`$`$l?`$`9l?`?˙?l?ä?Ř?<3F>$˙$r˙$6˙$0˙+˙$$˙$+˙+ä+l+r$``l$``l `$
` l ` ˙ l Ř ä <1F>$?˙$9˙$˙$˙Hl$äV`lä ˙ l ˙ ` ˙ P ` l ` l ä l
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include ../Makefile.inc
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DOS33 = ../dos33fs-utils/dos33
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all: eduet.dsk
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$(DOS33):
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cd ../dos33fs-utils && make
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eduet.dsk: $(DOS33) ED HIGHWIND.ED FIGHTING.ED
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$(DOS33) -y eduet.dsk BSAVE -a 0x900 ED
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$(DOS33) -y eduet.dsk BSAVE -a 0x2000 HIGHWIND.ED
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$(DOS33) -y eduet.dsk BSAVE -a 0x2000 FIGHTING.ED
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ED: duet.o
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ld65 -o ED duet.o -C ../linker_scripts/apple2_900.inc
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duet.o: duet.s
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ca65 -o duet.o duet.s -l duet.lst
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clean:
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rm -f *~ *.o *.lst ED
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; ***************************************************************************
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; * Copyright (C) 1979-2015 by Paul Lutus *
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; * http://arachnoid.com/administration *
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; * *
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; * This program is free software; you can redistribute it and/or modify *
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; * it under the terms of the GNU General Public License as published by *
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; * the Free Software Foundation; either version 2 of the License, or *
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; * (at your option) any later version. *
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; * *
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; * This program is distributed in the hope that it will be useful, *
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; * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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; * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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; * GNU General Public License for more details. *
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; * *
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; * You should have received a copy of the GNU General Public License *
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; * along with this program; if not, write to the *
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; * Free Software Foundation, Inc., *
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; * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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; ***************************************************************************
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; Electric Duet Player Routine circa 1980
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.define EQU =
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; These are all "Free" zero page locations
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LOC6 EQU $06
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LOC7 EQU $07
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DURATION EQU $08
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LOC9 EQU $09
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LOC1D EQU $1D
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MADDRL EQU $1E
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MADDRH EQU $1F
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LOC4E EQU $4E
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LOC4F EQU $4F
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play_ed:
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LDA #$01 ; 900: A9 01 ; 2 *!*
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STA LOC9 ; 902: 85 09 ; 3
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STA LOC1D ; 904: 85 1D ; 3
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PHA ; 906: 48 ; 3
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PHA ; 907: 48 ; 3
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PHA ; 908: 48 ; 3
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BNE label1 ; 909: D0 15 ; 4 *!*
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label2:
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INY ; 90B: C8 ; 2
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LDA (MADDRL),Y ; 90C: B1 1E ; 5 *!*
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STA LOC9 ; 90E: 85 09 ; 3
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INY ; 910: C8 ; 2
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LDA (MADDRL),Y ; 911: B1 1E ; 5 *!*
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STA LOC1D ; 913: 85 1D ; 3
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loop:
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LDA MADDRL ; 915: A5 1E ; 3 *!*
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CLC ; 917: 18 ; 2
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ADC #$03 ; 918: 69 03 ; 2 *!*
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STA MADDRL ; 91A: 85 1E ; 3
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BCC label1 ; 91C: 90 02 ; 4 *!*
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INC MADDRH ; 91E: E6 1F ; 5
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label1:
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LDY #$00 ; 920: A0 00 ; 2 *!* Set Y to zero
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LDA (MADDRL),Y ; 922: B1 1E ; 5 *!* Load first byte
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CMP #$01 ; 924: C9 01 ; 2 Compare to 1
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BEQ label2 ; 926: F0 E3 ; 4 *!* If one ?
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BCS play_note ; 928: B0 0D ; 4 *!* If >1, then duration
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PLA ; 92A: 68 ; 4 POP
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PLA ; 92B: 68 ; 4 POP
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PLA ; 92C: 68 ; 4 POP
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sub1:
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LDX #$49 ; 92D: A2 49 ; 2 *!* X=0x49 (EOR opcode)
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INY ; 92F: C8 ; 2 increment to next byte
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LDA (MADDRL),Y ; 930: B1 1E ; 5 *!* load next byte
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BNE label4 ; 932: D0 02 ; 4 *!* if not zero
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LDX #$C9 ; 934: A2 C9 ; 2 *!* X=0xC9 (CMP opcode)
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label4:
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RTS ; 936: 60 ; 6 return
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play_note:
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STA DURATION ; 937: 85 08 ; 3
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JSR sub1 ; 939: 20 2D09 ; 6
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STX $0983 ; 93C: 8E 8309 ; 4 self-modify EOR/CMP
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STA LOC6 ; 93F: 85 06 ; 3
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LDX LOC9 ; 941: A6 09 ; 3 *!*
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label5:
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LSR A ; 943: 4A ; 2
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DEX ; 944: CA ; 2
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BNE label5 ; 945: D0 FC ; 4 *!*
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STA $097C ; 947: 8D 7C09 ; 4 ; self-modify
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JSR sub1 ; 94A: 20 2D09 ; 6
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STX $09BB ; 94D: 8E BB09 ; 4 ; self-modify
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STA LOC7 ; 950: 85 07 ; 3
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LDX LOC1D ; 952: A6 1D ; 3 *!*
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label6:
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LSR A ; 954: 4A ; 2
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DEX ; 955: CA ; 2
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BNE label6 ; 956: D0 FC ; 4 *!*
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STA $09B4 ; 958: 8D B409 ; 4 ; self-modify
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PLA ; 95B: 68 ; 4
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TAY ; 95C: A8 ; 2
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PLA ; 95D: 68 ; 4
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TAX ; 95E: AA ; 2
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PLA ; 95F: 68 ; 4
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BNE label8 ; 960: D0 03 ; 4 *!*
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label99:
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BIT $C030 ; 962: 2C 30C0 ; 4 SPEAKER
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label8:
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CMP #$00 ; 965: C9 00 ; 2
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BMI label7 ; 967: 30 03 ; 4 *!*
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NOP ; 969: EA ; 2
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BPL label9 ; 96A: 10 03 ; 4 *!*
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label7:
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BIT $C030 ; 96C: 2C 30C0 ; 4 SPEAKER
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label9:
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STA LOC4E ; 96F: 85 4E ; 3
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BIT $C000 ; 971: 2C 00C0 ; 4
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BMI label4 ; 974: 30 C0 ; 4 *!*
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DEY ; 976: 88 ; 2
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BNE label10 ; 977: D0 02 ; 4 *!*
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BEQ label11 ; 979: F0 06 ; 4 *!*
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label10:
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CPY #$00 ; 97B: C0 00 ; 2
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BEQ label12 ; 97D: F0 04 ; 4 *!* !!!
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BNE label13 ; 97F: D0 04 ; 4 *!*
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label11:
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LDY LOC6 ; 981: A4 06 ; 3 *!*
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label12:
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EOR #$40 ; 983: 49 40 ; 2 *!* !!!
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label13:
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BIT LOC4E ; 985: 24 4E ; 3
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BVC label14 ; 987: 50 07 ; 4 *!*
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BVS label15 ; 989: 70 00 ; 4 *!*
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label15:
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BPL label16 ; 98B: 10 09 ; 4 *!*
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NOP ; 98D: EA ; 2
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BMI label17 ; 98E: 30 09 ; 4 *!*
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label14:
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NOP ; 990: EA ; 2
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BMI label16 ; 991: 30 03 ; 4 *!*
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NOP ; 993: EA ; 2
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BPL label17 ; 994: 10 03 ; 4 *!*
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label16:
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CMP $C030 ; 996: CD 30C0 ; 4 SPEAKER
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label17:
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DEC LOC4F ; 999: C6 4F ; 5
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BNE label18 ; 99B: D0 11 ; 4 *!*
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DEC DURATION ; 99D: C6 08 ; 5
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BNE label18 ; 99F: D0 0D ; 4 *!*
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BVC label19 ; 9A1: 50 03 ; 4 *!*
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BIT $C030 ; 9A3: 2C 30C0 ; 4 SPEAKER
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label19:
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PHA ; 9A6: 48 ; 3
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TXA ; 9A7: 8A ; 2
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PHA ; 9A8: 48 ; 3
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TYA ; 9A9: 98 ; 2
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PHA ; 9AA: 48 ; 3
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JMP loop ; 9AB: 4C 1509 ; 3
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label18:
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DEX ; 9AE: CA ; 2
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BNE label20 ; 9AF: D0 02 ; 4 *!*
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BEQ label21 ; 9B1: F0 06 ; 4 *!*
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label20:
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CPX #$00 ; 9B3: E0 00 ; 2
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BEQ label22 ; 9B5: F0 04 ; 4 *!* !!!
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BNE label23 ; 9B7: D0 04 ; 4 *!*
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label21:
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LDX LOC7 ; 9B9: A6 07 ; 3 *!*
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label22:
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EOR #$80 ; 9BB: 49 80 ; 2 *!* !!!
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label23:
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BVS label99 ; 9BD: 70 A3 ; 4 *!*
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NOP ; 9BF: EA ; 2
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BVC label8 ; 9C0: 50 A3 ; 4 *!*
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Binary file not shown.
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@ -19,7 +19,7 @@ tfv.dsk: $(DOS33) TFV ED HIGHWIND.ED FIGHTING.ED
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$(DOS33) -y tfv.dsk BSAVE -a 0x2000 FIGHTING.ED
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ED: duet.o
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ld65 -o ED duet.o -C ./apple2_900.inc
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ld65 -o ED duet.o -C ../linker_scripts/apple2_900.inc
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duet.o: duet.s
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ca65 -o duet.o duet.s -l duet.lst
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