/* eclipse_tt.c: Eclipse console terminal simulator

   Copyright (c) 1998-2005, Charles E Owen
   Portions copyright (c) 1993-2002, Robert M Supnik
   Written by Charles Owen, used by gracious permission

   Permission is hereby granted, free of charge, to any person obtaining a
   copy of this software and associated documentation files (the "Software"),
   to deal in the Software without restriction, including without limitation
   the rights to use, copy, modify, merge, publish, distribute, sublicense,
   and/or sell copies of the Software, and to permit persons to whom the
   Software is furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

   Except as contained in this notice, the name of the author shall not be
   used in advertising or otherwise to promote the sale, use or other dealings
   in this Software without prior written authorization from the author.

   tti          terminal input
   tto          terminal output

   25-Apr-03    RMS     Revised for extended file support
   03-Oct-02    RMS     Added DIBs
   30-May-02    RMS     Widened POS to 32b
   28-Jan-02    RMS     Cleaned up compiler warnings
*/

#include "nova_defs.h"

#define UNIT_V_DASHER   (UNIT_V_UF + 0)                 /* Dasher mode */
#define UNIT_DASHER (1 << UNIT_V_DASHER)

extern int32 int_req, dev_busy, dev_done, dev_disable;

int32 tti (int32 pulse, int32 code, int32 AC);
int32 tto (int32 pulse, int32 code, int32 AC);
t_stat tti_svc (UNIT *uptr);
t_stat tto_svc (UNIT *uptr);
t_stat tti_reset (DEVICE *dptr);
t_stat tto_reset (DEVICE *dptr);
t_stat ttx_setmod (UNIT *uptr, int32 value, char *cptr, void *desc);
void translate_in();
int32 translate_out(int32 c);
int32 putseq(char *seq);

/* TTI data structures

   tti_dev      TTI device descriptor
   tti_unit     TTI unit descriptor
   tti_reg      TTI register list
   ttx_mod      TTI/TTO modifiers list
*/

DIB tti_dib = { DEV_TTI, INT_TTI, PI_TTI, &tti };

UNIT tti_unit = { UDATA (&tti_svc, 0, 0), KBD_POLL_WAIT };

REG tti_reg[] = {
    { ORDATA (BUF, tti_unit.buf, 8) },
    { FLDATA (BUSY, dev_busy, INT_V_TTI) },
    { FLDATA (DONE, dev_done, INT_V_TTI) },
    { FLDATA (DISABLE, dev_disable, INT_V_TTI) },
    { FLDATA (INT, int_req, INT_V_TTI) },
    { DRDATA (POS, tti_unit.pos, T_ADDR_W), PV_LEFT },
    { DRDATA (TIME, tti_unit.wait, 24), REG_NZ + PV_LEFT },
    { NULL }
    };

MTAB ttx_mod[] = {
    { UNIT_DASHER, 0, "ANSI", "ANSI", &ttx_setmod },
    { UNIT_DASHER, UNIT_DASHER, "Dasher", "DASHER", &ttx_setmod },
    { 0 }
    };

DEVICE tti_dev = {
    "TTI", &tti_unit, tti_reg, ttx_mod,
    1, 10, 31, 1, 8, 8,
    NULL, NULL, &tti_reset,
    NULL, NULL, NULL,
    &tti_dib, 0
    };

/* TTO data structures

   tto_dev      TTO device descriptor
   tto_unit     TTO unit descriptor
   tto_reg      TTO register list
*/

DIB tto_dib = { DEV_TTO, INT_TTO, PI_TTO, &tto };

UNIT tto_unit = { UDATA (&tto_svc, 0, 0), SERIAL_OUT_WAIT };

REG tto_reg[] = {
    { ORDATA (BUF, tto_unit.buf, 8) },
    { FLDATA (BUSY, dev_busy, INT_V_TTO) },
    { FLDATA (DONE, dev_done, INT_V_TTO) },
    { FLDATA (DISABLE, dev_disable, INT_V_TTO) },
    { FLDATA (INT, int_req, INT_V_TTO) },
    { DRDATA (POS, tto_unit.pos, T_ADDR_W), PV_LEFT },
    { DRDATA (TIME, tto_unit.wait, 24), PV_LEFT },
    { NULL }
    };

DEVICE tto_dev = {
    "TTO", &tto_unit, tto_reg, ttx_mod,
    1, 10, 31, 1, 8, 8,
    NULL, NULL, &tto_reset,
    NULL, NULL, NULL,
    &tto_dib, 0
    };
    
    

/* Terminal input: IOT routine */

int32 tti (int32 pulse, int32 code, int32 AC)
{
int32 iodata;

iodata = (code == ioDIA)? tti_unit.buf & 0377: 0;
switch (pulse) {                                        /* decode IR<8:9> */

    case iopS:                                          /* start */
        dev_busy = dev_busy | INT_TTI;                  /* set busy */
        dev_done = dev_done & ~INT_TTI;                 /* clear done, int */
        int_req = int_req & ~INT_TTI;
        break;

    case iopC:                                          /* clear */
        dev_busy = dev_busy & ~INT_TTI;                 /* clear busy */
        dev_done = dev_done & ~INT_TTI;                 /* clear done, int */
        int_req = int_req & ~INT_TTI;
        break;
        }                                               /* end switch */

return iodata;
}

/* Unit service */

t_stat tti_svc (UNIT *uptr)
{
int32 temp;

sim_activate (&tti_unit, tti_unit.wait);                /* continue poll */
if ((temp = sim_poll_kbd ()) < SCPE_KFLAG) return temp; /* no char or error? */
tti_unit.buf = temp & 0177;
/* --- BEGIN MODIFIED CODE --- */
if (tti_unit.flags & UNIT_DASHER)                       /* translate input */
    translate_in();
/* ---  END  MODIFIED CODE --- */                   
dev_busy = dev_busy & ~INT_TTI;                         /* clear busy */
dev_done = dev_done | INT_TTI;                          /* set done */
int_req = (int_req & ~INT_DEV) | (dev_done & ~dev_disable);
tti_unit.pos = tti_unit.pos + 1;
return SCPE_OK;
}

/* -------------------- BEGIN INSERTION -----------------------*/

int curpos = 0;                                         /* used by translate_out() */
int row = 0, col = 0;                                   /* ditto - for cursor positioning */
int spec200 = 0;                                        /* signals next char is 'special' */

/* Translation: VT100 input to D200 keycodes. */

void translate_in()
{
    char rev = 0;
    
    if (tti_unit.buf == '\r')
        rev = '\n'; 
    if (tti_unit.buf == '\n')
        rev = '\r'; 
    if (rev)
        tti_unit.buf = rev; 
}

/* --------------------  END  INSERTION -----------------------*/

/* Reset routine */

t_stat tti_reset (DEVICE *dptr)
{
tti_unit.buf = 0;
dev_busy = dev_busy & ~INT_TTI;                         /* clear busy */
dev_done = dev_done & ~INT_TTI;                         /* clear done, int */
int_req = int_req & ~INT_TTI;
sim_activate (&tti_unit, tti_unit.wait);                /* activate unit */
return SCPE_OK;
}

/* Terminal output: IOT routine */

int32 tto (int32 pulse, int32 code, int32 AC)
{
if (code == ioDOA) tto_unit.buf = AC & 0377;
switch (pulse) {                                        /* decode IR<8:9> */

    case iopS:                                          /* start */
        dev_busy = dev_busy | INT_TTO;                  /* set busy */
        dev_done = dev_done & ~INT_TTO;                 /* clear done, int */
        int_req = int_req & ~INT_TTO;
        sim_activate (&tto_unit, tto_unit.wait);        /* activate unit */
        break;

    case iopC:                                          /* clear */
        dev_busy = dev_busy & ~INT_TTO;                 /* clear busy */
        dev_done = dev_done & ~INT_TTO;                 /* clear done, int */
        int_req = int_req & ~INT_TTO;
        sim_cancel (&tto_unit);                         /* deactivate unit */
        break;
        }                                               /* end switch */

return 0;
}

/* Unit service */

t_stat tto_svc (UNIT *uptr)
{
int32 c, temp;

dev_busy = dev_busy & ~INT_TTO;                         /* clear busy */
dev_done = dev_done | INT_TTO;                          /* set done */
int_req = (int_req & ~INT_DEV) | (dev_done & ~dev_disable);
c = tto_unit.buf & 0177;
/* --- BEGIN MODIFIED CODE --- */
if (tto_unit.flags & UNIT_DASHER) {
    if ((temp = translate_out(c)) != SCPE_OK) return temp;
} else {    
    if ((temp = sim_putchar (c)) != SCPE_OK) return temp;
    tto_unit.pos = tto_unit.pos + 1;
}   
/* ---  END  MODIFIED CODE --- */   
return SCPE_OK;
}

/* -------------------- BEGIN INSERTION -----------------------*/

/* Translation routine - D200 screen controls to VT-100 controls. */

int32 translate_out(int32 c)
{
    int32 temp;
    char outstr[32];
    
    if (spec200 == 1) {                                 /* Special terminal control seq */
        spec200 = 0;
        switch (c) {
            case 'C':                                   /* read model ID */
                return SCPE_OK;
            case 'E':                                   /* Reverse video off */
                return SCPE_OK;
            case 'D':                                   /* Reverse video on */
                return SCPE_OK;
            default:
                return SCPE_OK;         
        }
    }
    if (curpos == 1) {                                  /* 2nd char of cursor position */
        col = c & 0x7f;
        curpos++;
        return (SCPE_OK);
    }   
    if (curpos == 2) {                                  /* 3rd char of cursor position */
        row = c & 0x7f;
        curpos = 0;
        sprintf(outstr, "\033[%d;%dH", row+1, col+1);
        if ((temp = putseq(outstr)) != SCPE_OK) return temp;
        return (SCPE_OK);
    }   
    switch (c) {                                        /* Single-char command or data */
        case 003:                                       /* Blink enable */
            break;
        case 004:                                       /* Blink disable */
            break;
        case 005:                                       /* Read cursor address */
            break;  
        case 010:                                       /* Cursor home */
            sprintf(outstr, "\033[1;1H");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            row = col = 0;
            return (SCPE_OK);
        case 012:                                       /* Newline */
            if ((temp = sim_putchar('\r')) != SCPE_OK) return temp;
            tto_unit.pos += 1;
            if ((temp = sim_putchar(c)) != SCPE_OK) return temp;
            tto_unit.pos += 1;
            col = 1;
            row++;
            if (row > 24) row = 1;
            return (SCPE_OK);
        case 013:                                       /* Erase EOL */
            sprintf(outstr, "\033[K");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            return (SCPE_OK);
        case 014:                                       /* Erase screen */
            sprintf(outstr, "\033[1;1H\033[2J");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            row = col = 0;
            return (SCPE_OK);
        case 015:                                       /* CR */
            if ((temp = sim_putchar(c)) != SCPE_OK) return temp;
            tto_unit.pos += 1;
            col = 1;
            return (SCPE_OK);
        case 016:                                       /* Blink On */
            sprintf(outstr, "\033[5m");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            return (SCPE_OK);
        case 017:                                       /* Blink off */
            sprintf(outstr, "\033[25m");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            return (SCPE_OK);
        case 020:                                       /* Write cursor address */
            curpos = 1;
            return SCPE_OK;
        case 024:                                       /* underscore on */
            sprintf(outstr, "\033[4m");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            return (SCPE_OK);
        case 025:                                       /* underscore off */
            sprintf(outstr, "\033[24m");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            return (SCPE_OK);
            break;
        case 027:                                       /* cursor up */
            sprintf(outstr, "\033[A");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            row--;
            if (row < 1) row = 24;
            return (SCPE_OK);
        case 030:                                       /* cursor right */
            sprintf(outstr, "\033[C");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            col++;
            if (col > 80) {
                col = 1;
                row++;
                if (row > 24) row = 1;
            }   
            return (SCPE_OK);
        case 031:                                       /* Cursor left */
            sprintf(outstr, "\033[D");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            tto_unit.pos += 1;
            col--;
            if (col < 1) {
                col = 80;
                row--;
                if (row < 1) row = 24;
            }   
            return (SCPE_OK);
        case 032:                                       /* Cursor down */
            sprintf(outstr, "\033[B");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            row++;
            if (row > 24) row = 1;
            return (SCPE_OK);
        case 034:                                       /* Dim on */
            sprintf(outstr, "\033[22m");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            return (SCPE_OK);
        case 035:                                       /* Dim off */
            sprintf(outstr, "\033[1m");
            if ((temp = putseq(outstr)) != SCPE_OK) return temp;
            return (SCPE_OK);
        case 036:                                       /* Special sequence */
            spec200 = 1;
            return SCPE_OK;             
        default:                                        /* ..A character of data */
            if ((temp = sim_putchar(c)) != SCPE_OK) return temp;
            tto_unit.pos += 1;
            col++;
            if (col > 80) {
                col = 1;
                row++;
                if (row > 24) row = 24;
            }   
            return (SCPE_OK);
    }
    return SCPE_OK;
}

int32 putseq(char *seq)
{
    int i, len, temp;
    
    len = strlen(seq);
    for (i = 0; i < len; i++) {
        if ((temp = sim_putchar(seq[i])) != SCPE_OK) 
             return temp;
        tto_unit.pos += 1;
    }
    return SCPE_OK; 
}

/* --------------------  END  INSERTION -----------------------*/

/* Reset routine */

t_stat tto_reset (DEVICE *dptr)
{
tto_unit.buf = 0;
dev_busy = dev_busy & ~INT_TTO;                         /* clear busy */
dev_done = dev_done & ~INT_TTO;                         /* clear done, int */
int_req = int_req & ~INT_TTO;
sim_cancel (&tto_unit);                                 /* deactivate unit */
return SCPE_OK;
}

t_stat ttx_setmod (UNIT *uptr, int32 value, char *cptr, void *desc)
{
tti_unit.flags = (tti_unit.flags & ~UNIT_DASHER) | value;
tto_unit.flags = (tto_unit.flags & ~UNIT_DASHER) | value;
return SCPE_OK;
}
