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 *            1.1 (2007-11-08) - ADDED PEN POSITION TRACKING
  12 *                               TO PL$PU AND PL$PD
  13 *
  14 * AUTHOR:
  15 *
  16 *    PHILIPP HACHTMANN
  17 *
  18 *
  19 * PURPOSE:
  20 *
  21 *    LOW LEVEL PEN PLOTTER DRIVER ROUTINES PROVIDING HARDWARE
  22 *    ABSTRACTION BY PROVIDING SIMPLE ROUTINES FOR PEN MOVEMENT.
  23 *
  24 *
  25 * STORAGE:
  26 *
  27 *    100 (OCTAL)
  28 *     64 (DECIMAL)
  29 *
  30 *
  31 * USAGE:
  32 *
  33 *              CALL     PL$U  - STEP UP
  34 *              CALL     PL$D  - STEP DOWN
  35 *              CALL     PL$L  - STEP LEFT
  36 *              CALL     PL$R  - STEP RIGHT
  37 *              CALL     PL$PU - RAISE PEN
  38 *              CALL     PL$PD - LOWER PEN
  39 *
  40 *              CALL     PL$UR - STEP UP+RIGHT
  41 *              CALL     PL$UL - STEP UP+LEFT
  42 *              CALL     PL$DR - STEP DOWN+RIGHT
  43 *              CALL     PL$DL - STEP DOWN+LEFT
  44 *
  45 *
  46 *
  47 ********************************************************************************
  48 *
  49 *
  50 PADR    EQU     '40     PORT ADDRESS OF THE PLOTTER INTERFACE
  51 *
  52 *
  53         SUBR    PL$U,UP
  54         SUBR    PL$D,DOWN
  55         SUBR    PL$R,RGHT
  56         SUBR    PL$L,LEFT
  57         SUBR    PL$PU,PENU
  58         SUBR    PL$PD,PEND
  59         SUBR    PL$UR,UR
  60         SUBR    PL$UL,UL
  61         SUBR    PL$DR,DR
  62         SUBR    PL$DL,DL
  63 *
  64 *
  65         REL             THIS IS A RELOCATABLE OBJECT
  66         ORG     '0
  67 *
  68 *
  69 OUT     DAC     **      DO THE MOVEMENT
  70         OTA     PADR
  71         JMP     *-1
  72         JMP*    OUT
  73 *
  74 *
  75 UP      DAC     **
  76         LDA     CUP
  77         JST     OUT
  78         JMP*    UP
  79 *
  80 *
  81 DOWN    DAC     **
  82         LDA     CDWN
  83         JST     OUT
  84         JMP*    DOWN
  85 *
  86 *
  87 RGHT    DAC     **
  88         LDA     CRGT
  89         JST     OUT
  90         JMP*    RGHT
  91 *
  92 *
  93 LEFT    DAC     **
  94         LDA     CLFT
  95         JST     OUT
  96         JMP*    LEFT
  97 *
  98 *
  99 PENU    DAC     **
 100         LDA     PEN
 101         SNZ
 102         JMP*    PENU
 103         CRA
 104         STA     PEN
 105         LDA     CPNU
 106         JST     OUT
 107         JMP*    PENU
 108 *
 109 *
 110 PEND    DAC     **
 111         LDA     PEN
 112         SZE
 113         JMP*    PEND
 114         LDA     CPND
 115         JST     OUT
 116         IRS     PEN
 117         JMP*    PEND
 118 *
 119 *
 120 UL      DAC     **
 121         LDA     CUP
 122         ADD     CLFT
 123         JST     OUT
 124         JMP*    UL
 125 *
 126 *
 127 UR      DAC     **
 128         LDA     CUP
 129         ADD     CRGT
 130         JST     OUT
 131         JMP*    UR
 132 *
 133 *
 134 DL      DAC     **
 135         LDA     CDWN
 136         ADD     CLFT
 137         JST     OUT
 138         JMP*    DL
 139 *
 140 *
 141 DR      DAC     **
 142         LDA     CDWN
 143         ADD     CRGT
 144         JST     OUT
 145         JMP*    DR
 146 *
 147 *
 148 *                       CONSTANTS
 149 CUP     OCT     '1
 150 CDWN    OCT     '2
 151 CLFT    OCT     '4
 152 CRGT    OCT     '10
 153 CPNU    OCT     '20
 154 CPND    OCT     '40
 155 *
 156 PEN     DEC     0       PEN STATE: 1=DOWN
 157 *
 158         END