annotate code_part1/OSTC_code_asm_part1/displaytext.asm @ 673:7e651625d4c0

no decoplan update when switching gf
author heinrichsweikamp
date Mon, 10 Dec 2012 16:12:22 +0100
parents 53b16a746166
children c50296c3059e
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1 ; OSTC - diving computer code
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2 ; Copyright (C) 2008 HeinrichsWeikamp GbR
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3
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4 ; This program is free software: you can redistribute it and/or modify
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5 ; it under the terms of the GNU General Public License as published by
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6 ; the Free Software Foundation, either version 3 of the License, or
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7 ; (at your option) any later version.
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8
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9 ; This program is distributed in the hope that it will be useful,
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10 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ; GNU General Public License for more details.
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13
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14 ; You should have received a copy of the GNU General Public License
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15 ; along with this program. If not, see <http://www.gnu.org/licenses/>.
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16
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17
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18 ; Displays from text_table_vx.asm
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19 ; written by: Matthias Heinrichs, info@heinrichsweikamp.com
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20 ; written: 10/30/05
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21 ; last updated: 100730
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22 ; known bugs:
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23 ; ToDo:
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24
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25
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26 ; These macros output to POSTINC only
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27 OUTPUTTEXT macro n ; For Texts 1-255
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28 If n>.255
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29 Error "Bad low text number", n
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30 Endif
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31 movlw n
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32 call displaytext0_low
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33 endm
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35 OUTPUTTEXTH macro n ; For Texts 256-511
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36 If n<.256
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37 Error "Bad low text number", n
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38 Endif
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39 movlw n-.256 ; Use only Lower 8 Bit
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40 call displaytext0_high
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41 endm
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42
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43 displaytext0_high:
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44 bsf displaytext_high ; Highbit set
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45 bra displaytext0
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47 displaytext0_low:
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48 bcf displaytext_high ; Highbit clear
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49 displaytext0:
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50 bsf output_to_postinc_only
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51 bra displaytext
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52
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53 ; These macros output to letter[], and call the wordprocessor
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54 DISPLAYTEXT macro n
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55 movlw n
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56 call displaytext_1_low
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57 endm
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59 DISPLAYTEXTH macro n
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60 movlw LOW n ; Use only Lower 8 Bit
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61 call displaytext_1_high
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62 endm
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64 displaytext_1_high:
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65 bsf displaytext_high ; Highbit set
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66 bra displaytext
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67
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68 displaytext_1_low:
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69 bcf displaytext_high
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71 displaytext:
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72 movwf textnumber
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73 movlw LOW(text_pointer-4)
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74 movwf TBLPTRL
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75 movlw HIGH(text_pointer-4)
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76 movwf TBLPTRH
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77 movlw UPPER(text_pointer-4)
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78 movwf TBLPTRU
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80 movlw 4 ; textnumber * 4 --> PROD
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81 mulwf textnumber
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82
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83 btfsc displaytext_high ; If high text, add 4*256 to PROD
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84 addwf PRODH
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86 movf PRODL,W ; Add PROD to TBLPTR
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87 addwf TBLPTRL,F
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88 movf PRODH,W
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89 addwfc TBLPTRH,F
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90 movlw 0
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91 addwfc TBLPTRU
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93 TBLRD*+
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94 movff TABLAT,textaddress+0 ; textaddress:2 holds address for first character
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95 TBLRD*+
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96 movff TABLAT,textaddress+1
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97
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98 btfsc output_to_postinc_only ; output to postinc only?
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99 bra displaytext2
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100
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101 TBLRD*+
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102 movff TABLAT,win_leftx2 ; No, write coordinates
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104 TBLRD*+
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105 movff TABLAT,win_top ; No, write coordinates
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106
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107 displaytext2:
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108 clrf WREG ; Reset to small font
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109 movff WREG,win_font ; (BANK 0)
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111 movff textaddress+0,TBLPTRL
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112 movff textaddress+1,TBLPTRH
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113 btfss output_to_postinc_only ; output to postinc2 only?
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114 lfsr FSR2,letter ; no!
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116 displaytext3:
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117 TBLRD*+
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118 movf TABLAT,W
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119 bz display_text_exit ; Text finished?
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120 movwf POSTINC2
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121 bra displaytext3
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123 display_text_exit:
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124 btfss output_to_postinc_only ; output to postinc only?
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125 goto word_processor
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127 bcf output_to_postinc_only
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128 return