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annotate lib/kreiderclib/ccmod.as @ 3226:9749d0dfc4a2

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Changed a puls PC to rts to save cycles
author David Ladd <drencor-xeen@users.sourceforge.net>
date Sat, 20 Jan 2018 19:32:22 -0600
parents 1647f1874cdf
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1 * Disassembly by Os9disasm of ccmod.r
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2
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3 section bss
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5 * Uninitialized data (class B)
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6 B0000 rmb 1
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7 B0001 rmb 2
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8 * Initialized Data (class G)
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10 endsect
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12 section code
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13
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14 ccumod: clr B0000,y
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15 leax ccudiv,pcr
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16 stx B0001,y
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17 bra L0022
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18 ccmod: leax ccdiv,pcr
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19 stx B0001,y
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20 clr B0000,y
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21 tst 2,s
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22 bpl L0022
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23 inc B0000,y
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24 L0022 subd #0
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25 bne L002d
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26 puls x
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27 ldd ,s++
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28 jmp ,x
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29 L002d ldx 2,s
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30 pshs x
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31 jsr [B0001,y]
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32 ldd ,s
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33 std 2,s
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34 tfr x,d
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35 tst B0000,y
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36 beq L0045
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37 nega
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38 negb
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39 sbca #0
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40 L0045 std ,s++
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41 rts
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42
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43 endsect
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