annotate lib/kreiderclib/defdrive.as @ 3278:ea1afb494127

defs: Add Bt.Sec for atari and corsham
author Tormod Volden <debian.tormod@gmail.com>
date Sat, 07 Mar 2020 23:52:40 +0100
parents 1647f1874cdf
children
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1 * Disassembly by Os9disasm of defdrive.r
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2
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3 * class D external label equates
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4
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5 D0000 equ $0000
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6
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7 * class X external label equates
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8
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9 X0000 equ $0000
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10
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11 section bss
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12
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13 * Uninitialized data (class B)
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14 B0000 rmb 12
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15 * Initialized Data (class G)
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16
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17 endsect
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18
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19 section code
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20
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21 getdrive: pshs u
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22 leas -7,s
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23 clra
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24 clrb
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25 pshs d
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26 ldd #$000c
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27 pshs d
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28 leax >L0061,pcr
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29 pshs x
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30 lbsr modlink
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31 leas 6,s
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32 std ,s
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33 cmpd #-1
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34 beq L005b
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35 ldd ,s
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36 ldx ,s
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37 addd 16,x
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38 std 5,s
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39 leau B0000,y
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40 bra L0033
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41 L002f ldb 4,s
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42 stb ,u+
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43 L0033 ldx 5,s
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44 leax 1,x
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45 stx 5,s
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46 ldb -1,x
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47 stb 4,s
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48 bgt L002f
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49 ldb 4,s
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50 clra
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51 andb #$7f
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52 stb ,u+
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53 clra
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54 clrb
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55 stb ,u
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56 ldd ,s
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57 pshs d
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58 lbsr munlink
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59 leas 2,s
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60 leax B0000,y
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61 tfr x,d
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62 bra L005d
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63 L005b clra
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64 clrb
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65 L005d leas 7,s
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66 puls u,pc
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67 L0061 rola
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68 jmp 9,s
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69 fcb $74
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70 fcb $00
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71
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72 endsect
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