/* * The routines in this file provide support for the Zenith Z-100 PC * family. It goes directly to the graphics RAM to do screen output. * It compiles into nothing if not a Zenith driver. * * $Log: z309.c,v $ * Revision 1.4 1993/04/01 12:53:33 pgf * removed redundant includes and declarations * * Revision 1.3 1992/07/01 17:00:31 foxharp * scwrite arg changes * * Revision 1.2 1991/08/07 12:35:07 pgf * added RCS log messages * * revision 1.1 * date: 1990/09/21 10:26:29; * initial vile RCS revision */ #define termdef 1 /* don't define "term" external */ #include "estruct.h" #include "edef.h" #if Z309 /* set NROW to 25 for 25-line interlaced mode */ #define NROW 50 /* Screen size. */ #define NCOL 80 /* Edit if you want to. */ #define MARGIN 8 /* size of minimim margin and */ #define SCRSIZ 64 /* scroll size for extended lines */ #define NPAUSE 200 /* # times thru update to pause */ #define BEL 0x07 /* BEL character. */ #define ESC 0x1B /* ESC character. */ #define SPACE 32 /* space character */ #define SCADC 0xb8000000L /* CGA address of screen RAM */ #define SCADM 0xb0000000L /* MONO address of screen RAM */ #define CDMONO 0 /* monochrome text card */ #define CDCGA50 1 /* 50-line color graphics card */ #define CDCGI25 2 /* 25-line interlaced CGA text */ #define CDCGA25 3 /* 25-line color graphics card */ #define CDSENSE 9 /* detect the card type */ int dtype = CDCGA50; /* current display type */ long scadd; /* address of screen ram */ int *scptr[NROW]; /* pointer to screen lines */ int sline[NCOL]; /* screen line image */ extern union REGS rg; /* cpu register for use of DOS calls */ extern int ttopen(); /* Forward references. */ extern int ttgetc(); extern int ttputc(); extern int ttflush(); extern int ttclose(); extern int z309move(); extern int z309eeol(); extern int z309eeop(); extern int z309beep(); extern int z309open(); extern int z309rev(); extern int z309cres(); extern int z309close(); extern int z309putc(); extern int z309kopen(); extern int z309kclose(); #if COLOR extern int z309fcol(); extern int z309bcol(); int cfcolor = -1; /* current forground color */ int cbcolor = -1; /* current background color */ int ctrans[] = /* ansi to z309 color translation table */ {0, 4, 2, 6, 1, 5, 3, 7}; #endif /* * Standard terminal interface dispatch table. Most of the fields point into * "termio" code. */ TERM term = { NROW-1, NROW-1, NCOL, NCOL, MARGIN, SCRSIZ, NPAUSE, z309open, z309close, z309kopen, z309kclose, ttgetc, z309putc, ttflush, z309move, z309eeol, z309eeop, z309beep, z309rev, z309cres #if COLOR , z309fcol, z309bcol #endif }; extern union REGS rg; #if COLOR z309fcol(color) /* set the current output color */ int color; /* color to set */ { cfcolor = ctrans[color]; } z309bcol(color) /* set the current background color */ int color; /* color to set */ { cbcolor = ctrans[color]; } #endif z309move(row, col) { rg.h.ah = 2; /* set cursor position function code */ rg.h.dl = col; rg.h.dh = row; rg.h.bh = 0; /* set screen page number */ int86(0x10, &rg, &rg); } z309eeol() /* erase to the end of the line */ { int attr; /* attribute byte mask to place in RAM */ int *lnptr; /* pointer to the destination line */ int i; int ccol; /* current column cursor lives */ int crow; /* row */ /* find the current cursor position */ rg.h.ah = 3; /* read cursor position function code */ rg.h.bh = 0; /* current video page */ int86(0x10, &rg, &rg); ccol = rg.h.dl; /* record current column */ crow = rg.h.dh; /* and row */ /* build the attribute byte and setup the screen pointer */ #if COLOR if (dtype != CDMONO) attr = (((cbcolor & 15) << 4) | (cfcolor & 15)) << 8; else attr = 0x0700; #else attr = 0x0700; #endif lnptr = &sline[0]; for (i=0; i < term.t_ncol; i++) *lnptr++ = SPACE | attr; #if 0 /* Heath/Zenith builds flicker-less CGAs */ if (flickcode) { /* wait for vertical retrace to be off */ while ((inp(0x3da) & 8)) ; /* and to be back on */ while ((inp(0x3da) & 8) == 0) ; } #endif /* and send the string out */ movmem(&sline[0], scptr[crow]+ccol, (term.t_ncol-ccol)*2); } z309putc(ch) /* put a character at the current position in the current colors */ int ch; { rg.h.ah = 14; /* write char to screen with current attrs */ rg.h.al = ch; #if COLOR if (dtype != CDMONO) rg.h.bl = cfcolor; else rg.h.bl = 0x07; #else rg.h.bl = 0x07; #endif int86(0x10, &rg, &rg); } z309eeop() { int attr; /* attribute to fill screen with */ rg.h.ah = 6; /* scroll page up function code */ rg.h.al = 0; /* # lines to scroll (clear it) */ rg.x.cx = 0; /* upper left corner of scroll */ /*HERE*/ rg.x.dx = 0x184f; /* lower right corner of scroll */ #if COLOR if (dtype != CDMONO) attr = ((ctrans[gbcolor] & 15) << 4) | (ctrans[gfcolor] & 15); else attr = 0; #else attr = 0; #endif rg.h.bh = attr; int86(0x10, &rg, &rg); } z309rev(state) /* change reverse video state */ int state; /* TRUE = reverse, FALSE = normal */ { /* This never gets used under the z309-PC driver */ } z309cres(res) /* change screen resolution */ char *res; /* resolution to change to */ { if (strcmp(res, "CGA50") == 0) { scinit(CDCGA50); return(TRUE); } else if (strcmp(res, "MONO") == 0) { scinit(CDMONO); return(TRUE); } else return(FALSE); } z309beep() { #if MWC86 putcnb(BEL); #else bdos(6, BEL, 0); #endif } z309open() { scinit(CDSENSE); revexist = TRUE; ttopen(); } z309close() { rg.h.ah = 101; rg.h.al = 1; /* 25-line interlace mode */ int86(0x10, &rg, &rg); #if COLOR z309fcol(7); z309bcol(0); #endif ttclose(); } z309kopen() /* open the keyboard */ { } z309kclose() /* close the keyboard */ { } scinit(type) /* initialize the screen head pointers */ int type; /* type of adapter to init for */ { union { long laddr; /* long form of address */ int *paddr; /* pointer form of address */ } addr; int i; /* if asked...find out what display is connected */ int86(0x11, &rg, &rg); dtype = CDCGA50; scadd = SCADC; strcpy(sres, "CGA50"); if ((((rg.x.ax >> 4) & 11) == 3) || type == CDMONO) { strcpy(sres, "MONO"); dtype = CDMONO; scadd = SCADM; } else { rg.h.ah = 101; /* set al = 1 for 25-line interlace mode */ rg.h.al = 2; /* 50-line interlace mode */ int86(0x10, &rg, &rg); } /* initialize the screen pointer array */ for (i = 0; i < NROW; i++) { addr.laddr = scadd + (long)(NCOL * i * 2); scptr[i] = addr.paddr; } } scwrite(row, col, nchar, outstr, forg, bacg) /* write a line out*/ int row, col, nchar; /* row,col of screen to place nchars of outstr on */ char *outstr; /* string to write out (must be term.t_ncol long) */ int forg; /* forground color of string to write */ int bacg; /* background color */ { int attr; /* attribute byte mask to place in RAM */ int *lnptr; /* pointer to the destination line */ int i; /* build the attribute byte and setup the screen pointer */ #if COLOR if (dtype != CDMONO) attr = (((ctrans[bacg] & 15) << 4) | (ctrans[forg] & 15)) << 8; else attr = (((bacg & 15) << 4) | (forg & 15)) << 8; #else attr = (((bacg & 15) << 4) | (forg & 15)) << 8; #endif lnptr = &sline[0]; for (i=0; i