CalComp and Lahey Graphics Interface Emulations
INTERACTER includes software which emulates various CalComp compatible graphics interfaces, allowing legacy graphics code to be ported to any of the supported platforms or compilers. The emulation software is supplied in source code form, allowing it to be modified to meet individual developer's requirements. The three emulated interfaces are:
CalComp HCBS (Host Computer Basic Software)
Many Fortran programs written during the 1970's and 1980's used the HCBS interface which was designed for use with CalComp plotters and was subsequently reimplemented for various other device types. Our 'CalComp' interface emulates all 10 of the HCBS routines as defined in "Programming CalComp Electromechanical Plotters" (copyright California Computer Products Inc. 1977). The emulated HCBS routines are :
AXIS |
FACTOR |
LINE |
NEWPEN |
NUMBER |
PLOT |
PLOTS |
SCALE |
SYMBOL |
WHERE |
Lahey Video Graphics Library
The popular Lahey F77L and F77L-EM/32 DOS Fortran 77 compilers included a partial HCBS emulation library which also added various basic PC-related extensions. This library was briefly shipped with Lahey LF90 1.xx before being replaced by the Lahey INTERACTER Starter Kit(LISK) and later the Winteracter Starter Kit (WiSK). Our 'CalComp' interface provides a full emulation of the Lahey Video Graphics Library (LVGL) as defined by Lahey in the "Lahey F77L-EM/32 FORTRAN Programmer's Reference manual Revision C January 1992" (copyright Lahey Computer Systems 1992). The emulated LVGL routines are :
CIRCLE |
FACTOR |
FILL |
GETPIX |
GRINFO |
GTEXT |
ISKEY |
IXKEY |
NEWPEN |
PLOT |
PLOTS |
SETPIX |
WHERE |
Graphoria
Graphoria was an add-on product sold by Lahey, which provided a superset of the facilities provided by the Lahey Video Graphics Library. Graphoria completed the HCBS emulation and added a large number of 'CalComp-like' extensions. It also added hardcopy to the LVGL, which was a screen-only library. Lahey discontinued Graphoria in 1995.
Emulations of the majority of the most commonly used Graphoria routines are included with INTERACTER, allowing many Graphoria based programs to be rebuilt. The emulated Graphoria routines conform to the specification defined by Lahey in the "Graphoria Library Reference Manual Revision C May 1991" (copyright Lahey Computer Systems 1991). The emulated Graphoria routines are :
AROHD |
ARROW |
AXIS |
AXISB |
AXISC |
BAR |
CIRCL |
CIRCLE |
CNTRL |
CURVX |
CURVY |
DASHL |
DASHP |
DIMEN |
DVRINS |
DVRRMV |
FACTOR |
FILL |
FLINE |
FPNLEN |
GETPIX |
GRID |
GRINFO |
GTEXT |
HATCH |
IGETPX |
ILINE |
ISETPX |
ISKEY |
IXKEY |
KBCLR |
KBSTAT |
LABEL |
LINE |
MLIMIT |
MRESET |
MSETXY |
MSHOW |
NEWPEN |
NUMBER |
PIX2XY |
PLOT |
PLOTS |
POLY |
RECT |
SCALE |
SETPIX |
SYMBOL |
SYMLEN |
TXTRES |
TXTSAV |
WHERE |
XY2PIX |