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/* pdp8_tt.c: PDP-8 console terminal simulator
Copyright (c) 1993-2016, Robert M Supnik
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 Robert M Supnik shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
tti,tto KL8E terminal input/output
18-Apr-12 RMS Revised to use clock coscheduling
18-Jun-07 RMS Added UNIT_IDLE flag to console input
18-Oct-06 RMS Synced keyboard to clock
30-Sep-06 RMS Fixed handling of non-printable characters in KSR mode
22-Nov-05 RMS Revised for new terminal processing routines
28-May-04 RMS Removed SET TTI CTRL-C
29-Dec-03 RMS Added console output backpressure support
25-Apr-03 RMS Revised for extended file support
02-Mar-02 RMS Added SET TTI CTRL-C
22-Dec-02 RMS Added break support
01-Nov-02 RMS Added 7B/8B support
04-Oct-02 RMS Added DIBs, device number support
30-May-02 RMS Widened POS to 32b
07-Sep-01 RMS Moved function prototypes
*/
#include "pdp8_defs.h"
#include "sim_tmxr.h"
#include <ctype.h>
extern int32 int_req, int_enable, dev_done, stop_inst;
extern int32 tmxr_poll;
int32 tti (int32 IR, int32 AC);
int32 tto (int32 IR, 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 tty_set_mode (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
/* TTI data structures
tti_dev TTI device descriptor
tti_unit TTI unit descriptor
tti_reg TTI register list
tti_mod TTI modifiers list
*/
DIB tti_dib = { DEV_TTI, 1, { &tti } };
UNIT tti_unit = { UDATA (&tti_svc, UNIT_IDLE|TT_MODE_KSR, 0), SERIAL_IN_WAIT };
REG tti_reg[] = {
{ ORDATAD (BUF, tti_unit.buf, 8, "last data item processed") },
{ FLDATAD (DONE, dev_done, INT_V_TTI, "device done flag") },
{ FLDATAD (ENABLE, int_enable, INT_V_TTI, "interrupt enable flag") },
{ FLDATAD (INT, int_req, INT_V_TTI, "interrupt pending flag") },
{ DRDATAD (POS, tti_unit.pos, T_ADDR_W, "number of characters input"), PV_LEFT },
{ DRDATAD (TIME, tti_unit.wait, 24, "input polling interval (if 0, the keyboard is polled synchronously with the clock)"), PV_LEFT+REG_NZ },
{ NULL }
};
MTAB tti_mod[] = {
{ TT_MODE, TT_MODE_KSR, "KSR", "KSR", &tty_set_mode },
{ TT_MODE, TT_MODE_7B, "7b", "7B", &tty_set_mode },
{ TT_MODE, TT_MODE_8B, "8b", "8B", &tty_set_mode },
{ TT_MODE, TT_MODE_7P, "7b", NULL, NULL },
{ MTAB_XTD|MTAB_VDV, 0, "DEVNO", NULL, NULL, &show_dev, NULL },
{ 0 }
};
DEVICE tti_dev = {
"TTI", &tti_unit, tti_reg, tti_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &tti_reset,
NULL, NULL, NULL,
&tti_dib, 0
};
uint32 tti_buftime; /* time input character arrived */
/* TTO data structures
tto_dev TTO device descriptor
tto_unit TTO unit descriptor
tto_reg TTO register list
*/
DIB tto_dib = { DEV_TTO, 1, { &tto } };
UNIT tto_unit = { UDATA (&tto_svc, TT_MODE_KSR, 0), SERIAL_OUT_WAIT };
REG tto_reg[] = {
{ ORDATAD (BUF, tto_unit.buf, 8, "last date item processed") },
{ FLDATAD (DONE, dev_done, INT_V_TTO, "device done flag") },
{ FLDATAD (ENABLE, int_enable, INT_V_TTO, "interrupt enable flag") },
{ FLDATAD (INT, int_req, INT_V_TTO, "interrupt pending flag") },
{ DRDATAD (POS, tto_unit.pos, T_ADDR_W, "number of characters output"), PV_LEFT },
{ DRDATAD (TIME, tto_unit.wait, 24, "time form I/O initiation to interrupt"), PV_LEFT },
{ NULL }
};
MTAB tto_mod[] = {
{ TT_MODE, TT_MODE_KSR, "KSR", "KSR", &tty_set_mode },
{ TT_MODE, TT_MODE_7B, "7b", "7B", &tty_set_mode },
{ TT_MODE, TT_MODE_8B, "8b", "8B", &tty_set_mode },
{ TT_MODE, TT_MODE_7P, "7p", "7P", &tty_set_mode },
{ MTAB_XTD|MTAB_VDV, 0, "DEVNO", NULL, NULL, &show_dev },
{ 0 }
};
DEVICE tto_dev = {
"TTO", &tto_unit, tto_reg, tto_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &tto_reset,
NULL, NULL, NULL,
&tto_dib, 0
};
/* Terminal input: IOT routine */
int32 tti (int32 IR, int32 AC)
{
switch (IR & 07) { /* decode IR<9:11> */
case 0: /* KCF */
dev_done = dev_done & ~INT_TTI; /* clear flag */
int_req = int_req & ~INT_TTI;
return AC;
case 1: /* KSF */
return (dev_done & INT_TTI)? IOT_SKP + AC: AC;
case 2: /* KCC */
dev_done = dev_done & ~INT_TTI; /* clear flag */
int_req = int_req & ~INT_TTI;
return 0; /* clear AC */
case 4: /* KRS */
return (AC | tti_unit.buf); /* return buffer */
case 5: /* KIE */
if (AC & 1)
int_enable = int_enable | (INT_TTI+INT_TTO);
else int_enable = int_enable & ~(INT_TTI+INT_TTO);
int_req = INT_UPDATE; /* update interrupts */
return AC;
case 6: /* KRB */
dev_done = dev_done & ~INT_TTI; /* clear flag */
int_req = int_req & ~INT_TTI;
sim_activate_abs (&tti_unit, tti_unit.wait); /* check soon for more input */
return (tti_unit.buf); /* return buffer */
default:
return (stop_inst << IOT_V_REASON) + AC;
} /* end switch */
}
/* Unit service */
t_stat tti_svc (UNIT *uptr)
{
int32 c;
sim_clock_coschedule (uptr, tmxr_poll); /* continue poll */
if ((dev_done & INT_TTI) && /* prior character still pending and < 500ms? */
((sim_os_msec () - tti_buftime) < 500))
return SCPE_OK;
if ((c = sim_poll_kbd ()) < SCPE_KFLAG) /* no char or error? */
return c;
if (c & SCPE_BREAK) /* break? */
uptr->buf = 0;
else uptr->buf = sim_tt_inpcvt (c, TT_GET_MODE (uptr->flags) | TTUF_KSR);
tti_buftime = sim_os_msec ();
uptr->pos = uptr->pos + 1;
dev_done = dev_done | INT_TTI; /* set done */
int_req = INT_UPDATE; /* update interrupts */
return SCPE_OK;
}
/* Reset routine */
t_stat tti_reset (DEVICE *dptr)
{
tmxr_set_console_units (&tti_unit, &tto_unit);
tti_unit.buf = 0;
dev_done = dev_done & ~INT_TTI; /* clear done, int */
int_req = int_req & ~INT_TTI;
int_enable = int_enable | INT_TTI; /* set enable */
if (!sim_is_running) /* RESET (not CAF)? */
sim_activate (&tti_unit, KBD_WAIT (tti_unit.wait, tmxr_poll));
return SCPE_OK;
}
/* Terminal output: IOT routine */
int32 tto (int32 IR, int32 AC)
{
switch (IR & 07) { /* decode IR<9:11> */
case 0: /* TLF */
dev_done = dev_done | INT_TTO; /* set flag */
int_req = INT_UPDATE; /* update interrupts */
return AC;
case 1: /* TSF */
return (dev_done & INT_TTO)? IOT_SKP + AC: AC;
case 2: /* TCF */
dev_done = dev_done & ~INT_TTO; /* clear flag */
int_req = int_req & ~INT_TTO; /* clear int req */
return AC;
case 5: /* SPI */
return (int_req & (INT_TTI+INT_TTO))? IOT_SKP + AC: AC;
case 6: /* TLS */
dev_done = dev_done & ~INT_TTO; /* clear flag */
int_req = int_req & ~INT_TTO; /* clear int req */
case 4: /* TPC */
sim_activate (&tto_unit, tto_unit.wait); /* activate unit */
tto_unit.buf = AC; /* load buffer */
return AC;
default:
return (stop_inst << IOT_V_REASON) + AC;
} /* end switch */
}
/* Unit service */
t_stat tto_svc (UNIT *uptr)
{
int32 c;
t_stat r;
c = sim_tt_outcvt (uptr->buf, TT_GET_MODE (uptr->flags) | TTUF_KSR);
if (c >= 0) {
if ((r = sim_putchar_s (c)) != SCPE_OK) { /* output char; error? */
sim_activate (uptr, uptr->wait); /* try again */
return ((r == SCPE_STALL)? SCPE_OK: r); /* if !stall, report */
}
}
dev_done = dev_done | INT_TTO; /* set done */
int_req = INT_UPDATE; /* update interrupts */
uptr->pos = uptr->pos + 1;
return SCPE_OK;
}
/* Reset routine */
t_stat tto_reset (DEVICE *dptr)
{
tto_unit.buf = 0;
dev_done = dev_done & ~INT_TTO; /* clear done, int */
int_req = int_req & ~INT_TTO;
int_enable = int_enable | INT_TTO; /* set enable */
sim_cancel (&tto_unit); /* deactivate unit */
return SCPE_OK;
}
t_stat tty_set_mode (UNIT *uptr, int32 val, CONST char *cptr, void *desc)
{
tti_unit.flags = (tti_unit.flags & ~TT_MODE) | val;
tto_unit.flags = (tto_unit.flags & ~TT_MODE) | val;
return SCPE_OK;
}