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annotate tiletest.s16 @ 26:083347ccd508

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Implemented vblank interrupts and fixed a bug in exception vector address calculation
author Michael Pavone <pavone@retrodev.com>
date Fri, 01 Apr 2016 21:34:38 -0700
parents 04fc17376999
children
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19
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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1
04fc17376999 Sort of working tile rendering and tile test ROM
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2 ;write palette entries to CRAM
04fc17376999 Sort of working tile rendering and tile test ROM
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3 ldim 0, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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4 ldimh $FF, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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5 outi 14, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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6 ldim colors, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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7 ldim $80, r1
04fc17376999 Sort of working tile rendering and tile test ROM
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8 ldimh $0, r1
04fc17376999 Sort of working tile rendering and tile test ROM
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9 ldim 0, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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10 cloop:
04fc17376999 Sort of working tile rendering and tile test ROM
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11 ld16 r0, r2, r3
04fc17376999 Sort of working tile rendering and tile test ROM
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12 outi 15, r3
04fc17376999 Sort of working tile rendering and tile test ROM
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13 addi 2, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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14 cmp r1, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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15 bne cloop
04fc17376999 Sort of working tile rendering and tile test ROM
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16
04fc17376999 Sort of working tile rendering and tile test ROM
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17 ;write tile to VRAM
04fc17376999 Sort of working tile rendering and tile test ROM
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18 ldim 0, r2
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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19 outi 14, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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20 ldim tile, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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21 ldim 32, r1
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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22 tloop:
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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23 ld16 r0, r2, r3
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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24 outi 15, r3
04fc17376999 Sort of working tile rendering and tile test ROM
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25 addi 2, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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26 cmp r1, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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27 bne tloop
04fc17376999 Sort of working tile rendering and tile test ROM
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28
04fc17376999 Sort of working tile rendering and tile test ROM
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29 ;write name table entries to VRAM
04fc17376999 Sort of working tile rendering and tile test ROM
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30 ldim 0, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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31 ldimh $60, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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32 outi 14, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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33 ;current entry
04fc17376999 Sort of working tile rendering and tile test ROM
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34 ldim 0, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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35 ;increment
04fc17376999 Sort of working tile rendering and tile test ROM
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36 ldimh $8, r2
04fc17376999 Sort of working tile rendering and tile test ROM
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37 ;counter
04fc17376999 Sort of working tile rendering and tile test ROM
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38 ldim $00, r1
04fc17376999 Sort of working tile rendering and tile test ROM
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39 ldimh $7, r1
04fc17376999 Sort of working tile rendering and tile test ROM
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40 nloop:
04fc17376999 Sort of working tile rendering and tile test ROM
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41 outi 15, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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42 add r2, r0, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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43 addi -1, r1
04fc17376999 Sort of working tile rendering and tile test ROM
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44 bne nloop
04fc17376999 Sort of working tile rendering and tile test ROM
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45
04fc17376999 Sort of working tile rendering and tile test ROM
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46 ;write vscroll register
04fc17376999 Sort of working tile rendering and tile test ROM
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47 ldim $0, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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48 ldimh $E6, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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49 outi $C, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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50 ;write hscroll register to enable display
04fc17376999 Sort of working tile rendering and tile test ROM
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51 ldimh $80, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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52 outi $D, r0
04fc17376999 Sort of working tile rendering and tile test ROM
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53 forever:
04fc17376999 Sort of working tile rendering and tile test ROM
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54 bra forever
04fc17376999 Sort of working tile rendering and tile test ROM
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55 tile:
04fc17376999 Sort of working tile rendering and tile test ROM
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56 dc.l $000FFFFF
04fc17376999 Sort of working tile rendering and tile test ROM
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57 dc.l $E111EEEE
04fc17376999 Sort of working tile rendering and tile test ROM
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58 dc.l $DD222DDD
04fc17376999 Sort of working tile rendering and tile test ROM
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59 dc.l $CCC333CC
04fc17376999 Sort of working tile rendering and tile test ROM
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60 dc.l $BBBB444B
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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61 dc.l $AAAAA555
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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62 dc.l $99996669
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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63 dc.l $88877788
04fc17376999 Sort of working tile rendering and tile test ROM
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64 colors:
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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65 dc.w $0000, $0001, $0002, $0003
04fc17376999 Sort of working tile rendering and tile test ROM
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66 dc.w $0004, $0005, $0006, $0007
04fc17376999 Sort of working tile rendering and tile test ROM
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67 dc.w $0008, $0009, $000A, $000B
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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68 dc.w $000C, $000D, $000E, $000F
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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69
04fc17376999 Sort of working tile rendering and tile test ROM
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70 dc.w $0000, $0010, $0020, $0030
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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71 dc.w $0040, $0050, $0060, $0070
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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72 dc.w $0080, $0090, $00A0, $00B0
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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73 dc.w $00C0, $00D0, $00E0, $00F0
04fc17376999 Sort of working tile rendering and tile test ROM
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74
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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75 dc.w $0000, $0100, $0200, $0300
04fc17376999 Sort of working tile rendering and tile test ROM
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76 dc.w $0400, $0500, $0600, $0700
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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77 dc.w $0800, $0900, $0A00, $0B00
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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78 dc.w $0C00, $0D00, $0E00, $0F00
04fc17376999 Sort of working tile rendering and tile test ROM
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79
04fc17376999 Sort of working tile rendering and tile test ROM
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80 dc.w $0000, $0111, $0222, $0333
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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81 dc.w $0444, $0555, $0666, $0777
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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82 dc.w $0888, $0999, $0AAA, $0BBB
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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83 dc.w $0CCC, $0DDD, $0EEE, $0FFF
04fc17376999 Sort of working tile rendering and tile test ROM
Michael Pavone <pavone@retrodev.com>
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84