lib/iolib/src/pl$u.asm

   1 * (PL$U) REV 1.0 LOW LEVEL INCREMENTAL PLOTTER DRIVER
   2 *
   3 *
   4 * PROGRAM TITLE:  PL$U  (PL$U, PL$D, PL$L, PL$R, PL$PU, PL$PD,
   5 *                        PL$UR,PL$UL,PL$DR,PL$DL)
   6 *
   7 *                 LOW LEVEL PEN PLOTTER ROUTINES
   8 *
   9 * REVISIONS:
  10 *            1.0 (2007-05-27)
  11 *
  12 * AUTHOR:
  13 *
  14 *    PHILIPP HACHTMANN
  15 *
  16 *
  17 * PURPOSE:
  18 *
  19 *    LOW LEVEL PEN PLOTTER DRIVER ROUTINES PROVIDING HARDWARE
  20 *    ABSTRACTION BY PROVIDING SIMPLE ROUTINES FOR PEN MOVEMENT.
  21 *
  22 *
  23 * STORAGE:
  24 *
  25 *    ??? (OCTAL)
  26 *    ??? (DECIMAL)
  27 *
  28 *
  29 * USAGE:
  30 *
  31 *              CALL     PL$U  - STEP UP
  32 *              CALL     PL$D  - STEP DOWN
  33 *              CALL     PL$L  - STEP LEFT
  34 *              CALL     PL$R  - STEP RIGHT
  35 *              CALL     PL$PU - RAISE PEN
  36 *              CALL     PL$PD - LOWER PEN
  37 *
  38 *              CALL     PL$UR - STEP UP+RIGHT
  39 *              CALL     PL$UL - STEP UP+LEFT
  40 *              CALL     PL$DR - STEP DOWN+RIGHT
  41 *              CALL     PL$DL - STEP DOWN+LEFT
  42 *
  43 *
  44 *
  45 ********************************************************************************
  46 *
  47 *
  48 PADR    EQU     '40     PORT ADDRESS OF THE PLOTTER INTERFACE
  49 *
  50 *
  51         SUBR    PL$U,UP
  52         SUBR    PL$D,DOWN
  53         SUBR    PL$R,RGHT
  54         SUBR    PL$L,LEFT
  55         SUBR    PL$PU,PENU
  56         SUBR    PL$PD,PEND
  57         SUBR    PL$UR,UR
  58         SUBR    PL$UL,UL
  59         SUBR    PL$DR,DR
  60         SUBR    PL$DL,DL
  61 *
  62 *
  63         REL             THIS IS A RELOCATABLE OBJECT
  64         ORG     '0
  65 *
  66 *
  67 OUT     DAC     **      DO THE MOVEMENT
  68         OTA     PADR
  69         JMP     *-1
  70         JMP*    OUT
  71 *
  72 *
  73 UP      DAC     **
  74         LDA     CUP
  75         JST     OUT
  76         JMP*    UP
  77 *
  78 *
  79 DOWN    DAC     **
  80         LDA     CDWN
  81         JST     OUT
  82         JMP*    DOWN
  83 *
  84 *
  85 RGHT    DAC     **
  86         LDA     CRGT
  87         JST     OUT
  88         JMP*    RGHT
  89 *
  90 *
  91 LEFT    DAC     **
  92         LDA     CLFT
  93         JST     OUT
  94         JMP*    LEFT
  95 *
  96 *
  97 PENU    DAC     **
  98         LDA     CPNU
  99         JST     OUT
 100         JMP*    PENU
 101 *
 102 *
 103 PEND    DAC     **
 104         LDA     CPND
 105         JST     OUT
 106         JMP*    PEND
 107 *
 108 *
 109 UL      DAC     **
 110         LDA     CUP
 111         ADD     CLFT
 112         JST     OUT
 113         JMP*    UL
 114 *
 115 *
 116 UR      DAC     **
 117         LDA     CUP
 118         ADD     CRGT
 119         JST     OUT
 120         JMP*    UR
 121 *
 122 *
 123 DL      DAC     **
 124         LDA     CDWN
 125         ADD     CLFT
 126         JST     OUT
 127         JMP*    DL
 128 *
 129 *
 130 DR      DAC     **
 131         LDA     CDWN
 132         ADD     CRGT
 133         JST     OUT
 134         JMP*    DR
 135 *
 136 *
 137 *                       CONSTANTS
 138 CUP     OCT     '1
 139 CDWN    OCT     '2
 140 CLFT    OCT     '4
 141 CRGT    OCT     '10
 142 CPNU    OCT     '20
 143 CPND    OCT     '40
 144 *
 145 *
 146         END