/*
SG C Tools 1.0

(C) 1993 Steve Goldsmith
All Rights Reserved

VDC memory fill example.  Shows how fast fillmemvdc() is by filling display
memory with letters A - Z.  Press [RETURN] to fill next screen.

Compiled with HI-TECH C 3.09 (CP/M-80).

To compile with HI-TECH C and SG C Tools source on same disk use:
C FILLMEM.C VDC.OBJ
*/

#include <hitech.h>
#include <conio.h>
#include <vdc.h>

#define appClrScrCh 32

void fillscreen(void);

extern ushort vdcScrSize;
extern ushort vdcDispMem;

main()
{
  savevdc();                        /* save vdc regs and set global vars */
  clrscrvdc(appClrScrCh);           /* clear screen */
  clrattrvdc(vdcAltChrSet);         /* clear attributes */
  setcursorvdc(0,0,vdcCurNone);     /* turn cursor off */
  outvdc(vdcFgBgColor,vdcDarkBlue); /* set new screen color */
  printstrvdc(0,0,vdcAltChrSet,
  "VDC memory fill example.  Keep pressing [RETURN] until complete.");
  while (getch() != 0x0D);          /* wait for return press */
  fillscreen();                     /* fill screen */
  restorevdc();                     /* restore registers saved by savevdc() */
  clrscrvdc(appClrScrCh);
  clrattrvdc(vdcAltChrSet+vdcWhite);
}

void fillscreen(void)
{
  uchar I;

  for (I = 65; I < 91; I++)
  {
    fillmemvdc(vdcDispMem,vdcScrSize,I);
    while (getch() != 0x0D);
  }
}