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95 lines
2.5 KiB
Groff
95 lines
2.5 KiB
Groff
SUBTTL 340 Display Definitions
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;Command Operation Codes
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;----- Valid in Any Mode
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GTOPRM==BIT2.9 ;this command is guarenteed to place the display
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;into parameter mode regardless of the current mode
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;----- Valid in Parameter and Point Commands
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PARM== 0 ;next command is parameter mode
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POINT== BIT2.5 ; " " " point "
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VECT== BIT2.7 ; " " " vector "
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VECTC== BIT2.7+BIT2.5 ; " " " vector-continue mode
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CHAR== BIT2.6+BIT2.5 ; " " " character mode
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INCR== BIT2.7+BIT2.6 ; " " " increment "
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;----- Valid in Vector, Vector-Continue, and Increment Modes
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ESCAPE==BIT2.9 ;return display to parameter mode
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;Specific Bits/Values for Different Command Types
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;----- Parameter Mode
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DISHLT==<GTOPRM,,BIT2.2+BIT2.1> ;stop this display list
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;----- Point Mode
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DISPNT==BIT2.2 ;intensify the current point
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;----- Vector and Vector-Continue Modes
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DISVCT==BIT2.8 ;make this vector visible
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NEGX== BIT1.8 ;if on, X shift is negative
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NEGY== BIT2.7 ;if on, Y shift is negative
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;----- Character Mode (Any Case)
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CHRESC==37 ;escape from character mode
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CHRUC== 35 ;shift to upper-case
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CHRLC== 36 ; " " lower-case
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CHRLF== 33 ;line-feed
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CHRCR== 34 ;carriage-return
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CHRSP== 40 ;space
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;Macros to Generate Display Commands
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;SCALE(VALUE)
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; Function:
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; Generates a parameter mode command to set the display scaling factor.
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; Inputs:
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; VALUE: The scaling factor as a value from 0 to 3.
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DEFINE SCALE (VALUE
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<BIT1.7+<VALUE&3>_4>TERMIN
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;INTSTY(VALUE)
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; Function:
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; Generates a parameter mode display command to set the display intesity.
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; Inputs:
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; VALUE: The intensity as a value from 0 through 7.
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DEFINE INTSTY (VALUE
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<BIT1.4+<VALUE&7>>TERMIN
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;SETY(VALUE)
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; Function:
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; Generates a point mode command to set the Y ordinate.
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; Inputs:
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; VALUE: The Y ordinate as a value from 0 through 1777(8).
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DEFINE SETY (VALUE
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<BIT2.8+<VALUE&1777'>>TERMIN
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;SETX(VALUE)
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; Function:
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; Generates a point mode command to set the X ordinate.
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; Inputs:
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; VALUE: The X ordinate as a value from 0 through 1777(8).
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DEFINE SETX (VALUE
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<VALUE&1777'>TERMIN
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;VECTOR(XVALUE,YVALUE)
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; Function:
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; Generates a vector or vector-continue command to create a vector.
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; Inputs:
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; XVALUE: The magnitude (positive) of the X shift. It is in the range 0
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; through 177(8).
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; YVALUE: The magnitude of the Y shift. It is treated identically to XVALUE.
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DEFINE VECTOR (XVALUE,YVALUE
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<<XVALUE&177'>+<<YVALUE&177'>_8.>>TERMIN
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