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- /*
- * 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.
- */
-
- #define termdef 1 /* don't define "term" external */
-
- #include <stdio.h>
- #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, outstr, forg, bacg) /* write a line out*/
-
- int row; /* row of screen to place 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<term.t_ncol; i++)
- *lnptr++ = (outstr[i] & 255) | 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[row],term.t_ncol*2);
- }
-
- #if FLABEL
- fnclabel(f, n) /* label a function key */
-
- int f,n; /* default flag, numeric argument [unused] */
-
- {
- /* on machines with no function keys...don't bother */
- return(TRUE);
- }
- #endif
- #else
- z309hello()
- {
- }
- #endif
-