+++ /dev/null
-* (PL$U) REV 1.0 LOW LEVEL INCREMENTAL PLOTTER DRIVER
-*
-*
-* PROGRAM TITLE: PL$U (PL$U, PL$D, PL$L, PL$R, PL$PU, PL$PD,
-* PL$UR,PL$UL,PL$DR,PL$DL)
-*
-* LOW LEVEL PEN PLOTTER ROUTINES
-*
-* REVISIONS:
-* 1.0 (2007-05-27)
-* 1.1 (2007-11-08) - ADDED PEN POSITION TRACKING
-* TO PL$PU AND PL$PD
-*
-* AUTHOR:
-*
-* PHILIPP HACHTMANN
-*
-*
-* PURPOSE:
-*
-* LOW LEVEL PEN PLOTTER DRIVER ROUTINES PROVIDING HARDWARE
-* ABSTRACTION BY PROVIDING SIMPLE ROUTINES FOR PEN MOVEMENT.
-*
-*
-* STORAGE:
-*
-* 100 (OCTAL)
-* 64 (DECIMAL)
-*
-*
-* USAGE:
-*
-* CALL PL$U - STEP UP
-* CALL PL$D - STEP DOWN
-* CALL PL$L - STEP LEFT
-* CALL PL$R - STEP RIGHT
-* CALL PL$PU - RAISE PEN
-* CALL PL$PD - LOWER PEN
-*
-* CALL PL$UR - STEP UP+RIGHT
-* CALL PL$UL - STEP UP+LEFT
-* CALL PL$DR - STEP DOWN+RIGHT
-* CALL PL$DL - STEP DOWN+LEFT
-*
-*
-*
-********************************************************************************
-*
-*
-PADR EQU '40 PORT ADDRESS OF THE PLOTTER INTERFACE
-*
-*
- SUBR PL$U,UP
- SUBR PL$D,DOWN
- SUBR PL$R,RGHT
- SUBR PL$L,LEFT
- SUBR PL$PU,PENU
- SUBR PL$PD,PEND
- SUBR PL$UR,UR
- SUBR PL$UL,UL
- SUBR PL$DR,DR
- SUBR PL$DL,DL
-*
-*
- REL THIS IS A RELOCATABLE OBJECT
- ORG '0
-*
-*
-OUT DAC ** DO THE MOVEMENT
- OTA PADR
- JMP *-1
- JMP* OUT
-*
-*
-UP DAC **
- LDA CUP
- JST OUT
- JMP* UP
-*
-*
-DOWN DAC **
- LDA CDWN
- JST OUT
- JMP* DOWN
-*
-*
-RGHT DAC **
- LDA CRGT
- JST OUT
- JMP* RGHT
-*
-*
-LEFT DAC **
- LDA CLFT
- JST OUT
- JMP* LEFT
-*
-*
-PENU DAC **
- LDA PEN
- SNZ
- JMP* PENU
- CRA
- STA PEN
- LDA CPNU
- JST OUT
- JMP* PENU
-*
-*
-PEND DAC **
- LDA PEN
- SZE
- JMP* PEND
- LDA CPND
- JST OUT
- IRS PEN
- JMP* PEND
-*
-*
-UL DAC **
- LDA CUP
- ADD CLFT
- JST OUT
- JMP* UL
-*
-*
-UR DAC **
- LDA CUP
- ADD CRGT
- JST OUT
- JMP* UR
-*
-*
-DL DAC **
- LDA CDWN
- ADD CLFT
- JST OUT
- JMP* DL
-*
-*
-DR DAC **
- LDA CDWN
- ADD CRGT
- JST OUT
- JMP* DR
-*
-*
-* CONSTANTS
-CUP OCT '1
-CDWN OCT '2
-CLFT OCT '4
-CRGT OCT '10
-CPNU OCT '20
-CPND OCT '40
-*
-PEN DEC 0 PEN STATE: 1=DOWN
-*
- END