[Simh] H316 TTY
Bob Supnik
bob at supnik.org
Wed Oct 9 17:48:09 EDT 2013
I'm attaching a "beta" copy of the revised H316 TTY (and other standard
devices) simulator. It fixes several bugs described several months ago
about how the hardware really works, most notably the "dummy" cycle
created by an OCP '1 (switch to output mode). In addition, it fixes
other problems (OCP '0 and OCP '1 are unconditional) and adds a "busy"
state on character input, like the real hardware.
If you use the H316 simulator, please try this out and see if it still
works with your test cases.
/Bob
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/* h316_stddev.c: Honeywell 316/516 standard devices
Copyright (c) 1999-2013, 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.
ptr 316/516-50 paper tape reader
ptp 316/516-52 paper tape punch
tty 316/516-33 teleprinter
clk/options 316/516-12 real time clocks/internal options
10-Sep-13 RMS Fixed several bugs in the TTY logic
Added SET file type commands to PTR/PTP
09-Jun-07 RMS Fixed bug in clock increment (Theo Engel)
30-Sep-06 RMS Fixed handling of non-printable characters in KSR mode
03-Apr-06 RMS Fixed bugs in punch state handling (Theo Engel)
22-Nov-05 RMS Revised for new terminal processing routines
05-Feb-05 RMS Fixed bug in OCP '0001 (Philipp Hachtmann)
31-Jan-05 RMS Fixed bug in TTY print (Philipp Hachtmann)
01-Dec-04 RMS Fixed problem in SKS '104 (Philipp Hachtmann)
Fixed bug in SKS '504
Added PTR detach routine, stops motion
Added PTR/PTP ASCII file support
Added TTR/TTP support
24-Oct-03 RMS Added DMA/DMC support
25-Apr-03 RMS Revised for extended file support
01-Mar-03 RMS Added SET/SHOW CLK FREQ support
22-Dec-02 RMS Added break support
01-Nov-02 RMS Added 7b/8b support to terminal
30-May-02 RMS Widened POS to 32b
03-Nov-01 RMS Implemented upper case for console output
29-Nov-01 RMS Added read only unit support
07-Sep-01 RMS Moved function prototypes
The ASR-33/35 reader/punch logic, and the ASCII file support for all paper tape
devices, is taken, with grateful thanks, from Adrian Wise's H316 emulator.
Teletype transitions:
- An OCP '1 starts an output sequence, unconditionally. Ready and Busy are both
set, and a dummy output sequence is started.
- If OTA "overtakes" the dummy output sequence, the dummy sequence is stopped,
and normal output takes place.
- If OTA is not issued before the dummy sequence completes, Busy is cleared.
Because Ready is set, an interrupt is requested.
- An OCP '0 starts an input sequence, unconditionally. Ready and Busy are both
cleared.
- When a character is available (either from the keyboard or the reader), Busy
is set.
- At the end of a delay, Busy is cleared and Ready is set, and an interrupt is
requested.
- At all times, the interrupt flag reflects the equation Ready & ~Busy.
Teletype reader transitions:
- SET TTY2 START puts the reader in RUN.
- XOFF from keyboard/reader stops the reader after 1-2 more characters are read.
- XON from program starts the reader.
- Detach, SET TTY2 STOP, or end of file stops the reader.
Teletype punch transitions:
- SET TTY3 START puts the punch in RUN.
- XOFF from program stops the punch after 1 more character is punched.
- TAPE from program starts the punch after 1 character delay.
- Detach or SET TTY3 STOP stops the punch.
*/
#include "h316_defs.h"
#include <ctype.h>
#define UNIT_V_ASC (TTUF_V_UF + 0) /* ASCII */
#define UNIT_V_UASC (TTUF_V_UF + 1) /* Unix ASCII */
#define UNIT_ASC (1 << UNIT_V_ASC)
#define UNIT_UASC (1 << UNIT_V_UASC)
#define STA u3 /* state bits */
#define LF_PEND 01 /* lf pending */
#define RUNNING 02 /* tape running */
#define XON 0021
#define TAPE 0022
#define XOFF 0023
#define RUBOUT 0377
extern uint16 M[];
extern int32 PC;
extern int32 stop_inst;
extern int32 C, dp, ext, extoff_pending, sc;
extern int32 dev_int, dev_enb;
extern int32 sim_switches;
extern UNIT cpu_unit;
uint32 ptr_motion = 0; /* read motion */
uint32 ptr_stopioe = 0; /* stop on error */
uint32 ptp_stopioe = 0;
uint32 ptp_power = 0; /* punch power, time */
int32 ptp_ptime;
uint32 ttr_stopioe = 0;
uint32 tty_mode = 0; /* input (0), output (1) */
uint32 tty_buf = 0; /* tty buffer */
uint32 tty_ready = 1; /* tty ready */
uint32 tty_busy = 0; /* tty busy */
uint32 tty_2nd = 0; /* tty input second state */
uint32 ttr_xoff_read = 0;
uint32 ttp_tape_rcvd = 0;
uint32 ttp_xoff_rcvd = 0;
int32 tty_busy_wait = SERIAL_IN_WAIT; /* busy state on input */
int32 clk_tps = 60; /* ticks per second */
int32 ptrio (int32 inst, int32 fnc, int32 dat, int32 dev);
t_stat ptr_svc (UNIT *uptr);
t_stat ptr_reset (DEVICE *dptr);
t_stat ptr_boot (int32 unitno, DEVICE *dptr);
int32 ptpio (int32 inst, int32 fnc, int32 dat, int32 dev);
t_stat ptp_svc (UNIT *uptr);
t_stat ptp_reset (DEVICE *dptr);
int32 ttyio (int32 inst, int32 fnc, int32 dat, int32 dev);
t_stat tti_svc (UNIT *uptr);
t_stat tto_svc (UNIT *uptr);
t_stat tty_reset (DEVICE *dptr);
t_stat ttio_set_mode (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat ttrp_set_mode (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat ttrp_set_start_stop (UNIT *uptr, int32 val, char *cptr, void *desc);
int32 clkio (int32 inst, int32 fnc, int32 dat, int32 dev);
t_stat clk_svc (UNIT *uptr);
t_stat clk_reset (DEVICE *dptr);
t_stat clk_set_freq (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat clk_show_freq (FILE *st, UNIT *uptr, int32 val, void *desc);
t_stat pt_attach (UNIT *uptr, char *cptr);
t_stat pt_detach (UNIT *uptr);
t_stat tto_write (int32 c);
t_stat ttp_write (int32 c);
/* PTR data structures
ptr_dev PTR device descriptor
ptr_unit PTR unit descriptor
ptr_mod PTR modifiers
ptr_reg PTR register list
*/
DIB ptr_dib = { PTR, IOBUS, 1, &ptrio };
UNIT ptr_unit = {
UDATA (&ptr_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_ROABLE, 0),
SERIAL_IN_WAIT
};
REG ptr_reg[] = {
{ ORDATA (BUF, ptr_unit.buf, 8) },
{ FLDATA (READY, dev_int, INT_V_PTR) },
{ FLDATA (ENABLE, dev_enb, INT_V_PTR) },
{ FLDATA (MOTION, ptr_motion, 0) },
{ DRDATA (POS, ptr_unit.pos, T_ADDR_W), PV_LEFT },
{ DRDATA (TIME, ptr_unit.wait, 24), PV_LEFT },
{ ORDATA (RSTATE, ptr_unit.STA, 2), REG_HIDDEN },
{ FLDATA (STOP_IOE, ptr_stopioe, 0) },
{ NULL }
};
MTAB pt_mod[] = {
{ UNIT_ATTABLE+UNIT_ASC+UNIT_UASC, UNIT_ATTABLE, NULL, "BINARY",
&ttrp_set_mode },
{ UNIT_ATTABLE+UNIT_ASC+UNIT_UASC, UNIT_ATTABLE+UNIT_ASC, "ASCII", "ASCII",
&ttrp_set_mode },
{ UNIT_ATTABLE+UNIT_ASC+UNIT_UASC, UNIT_ATTABLE+UNIT_ASC+UNIT_UASC, "Unix ASCII", "UASCII",
&ttrp_set_mode },
{ 0 }
};
DEVICE ptr_dev = {
"PTR", &ptr_unit, ptr_reg, pt_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &ptr_reset,
&ptr_boot, &pt_attach, &pt_detach,
&ptr_dib, 0
};
/* PTP data structures
ptp_dev PTP device descriptor
ptp_unit PTP unit descriptor
ptp_mod PTP modifiers
ptp_reg PTP register list
*/
DIB ptp_dib = { PTP, IOBUS, 1, &ptpio };
UNIT ptp_unit = {
UDATA (&ptp_svc, UNIT_SEQ+UNIT_ATTABLE, 0), SERIAL_OUT_WAIT
};
REG ptp_reg[] = {
{ ORDATA (BUF, ptp_unit.buf, 8) },
{ FLDATA (READY, dev_int, INT_V_PTP) },
{ FLDATA (ENABLE, dev_enb, INT_V_PTP) },
{ FLDATA (POWER, ptp_power, 0) },
{ DRDATA (POS, ptp_unit.pos, T_ADDR_W), PV_LEFT },
{ ORDATA (PSTATE, ptp_unit.STA, 2), REG_HIDDEN },
{ DRDATA (TIME, ptp_unit.wait, 24), PV_LEFT },
{ DRDATA (PWRTIME, ptp_ptime, 24), PV_LEFT },
{ FLDATA (STOP_IOE, ptp_stopioe, 0) },
{ NULL }
};
DEVICE ptp_dev = {
"PTP", &ptp_unit, ptp_reg, pt_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &ptp_reset,
NULL, &pt_attach, NULL,
&ptp_dib, 0
};
/* TTY data structures
tty_dev TTY device descriptor
tty_unit TTY unit descriptor
tty_reg TTY register list
tty_mod TTy modifiers list
*/
#define TTI 0
#define TTO 1
#define TTR 2
#define TTP 3
DIB tty_dib = { TTY, IOBUS, 1, &ttyio };
UNIT tty_unit[] = {
{ UDATA (&tti_svc, TT_MODE_KSR, 0), KBD_POLL_WAIT },
{ UDATA (&tto_svc, TT_MODE_KSR, 0), SERIAL_OUT_WAIT },
{ UDATA (NULL, UNIT_SEQ+UNIT_ATTABLE+UNIT_ROABLE, 0) },
{ UDATA (NULL, UNIT_SEQ+UNIT_ATTABLE, 0) }
};
REG tty_reg[] = {
{ ORDATA (BUF, tty_buf, 8) },
{ ORDATA (IN2ND, tty_2nd, 9) },
{ FLDATA (MODE, tty_mode, 0) },
{ FLDATA (READY, tty_ready, 0) },
{ FLDATA (BUSY, tty_busy, 0) },
{ FLDATA (INT, dev_int, INT_V_TTY) },
{ FLDATA (ENABLE, dev_enb, INT_V_TTY) },
{ DRDATA (KPOS, tty_unit[TTI].pos, T_ADDR_W), PV_LEFT },
{ DRDATA (KTIME, tty_unit[TTI].wait, 24), REG_NZ + PV_LEFT },
{ DRDATA (KBTIME, tty_busy_wait, 24), REG_NZ + PV_LEFT },
{ DRDATA (TPOS, tty_unit[TTO].pos, T_ADDR_W), PV_LEFT },
{ DRDATA (TTIME, tty_unit[TTO].wait, 24), REG_NZ + PV_LEFT },
{ ORDATA (RXOFF, ttr_xoff_read, 2), REG_HIDDEN },
{ ORDATA (RSTATE, tty_unit[TTR].STA, 2), REG_HIDDEN },
{ DRDATA (RPOS, tty_unit[TTR].pos, T_ADDR_W), PV_LEFT },
{ ORDATA (PTAPE, ttp_tape_rcvd, 2), REG_HIDDEN },
{ ORDATA (PXOFF, ttp_xoff_rcvd, 2), REG_HIDDEN },
{ ORDATA (PSTATE, tty_unit[TTP].STA, 2), REG_HIDDEN },
{ DRDATA (PPOS, tty_unit[TTP].pos, T_ADDR_W), PV_LEFT },
{ FLDATA (STOP_IOE, ttr_stopioe, 0) },
{ NULL }
};
MTAB tty_mod[] = {
{ TT_MODE, TT_MODE_KSR, "KSR", "KSR", &ttio_set_mode },
{ TT_MODE, TT_MODE_7B, "7b", "7B", &ttio_set_mode },
{ TT_MODE, TT_MODE_8B, "8b", "8B", &ttio_set_mode },
{ TT_MODE, TT_MODE_7P, "7p", "7P", &ttio_set_mode },
{ UNIT_ATTABLE+UNIT_ASC+UNIT_UASC, UNIT_ATTABLE, NULL, "BINARY",
&ttrp_set_mode },
{ UNIT_ATTABLE+UNIT_ASC+UNIT_UASC, UNIT_ATTABLE+UNIT_ASC, "ASCII", "ASCII",
&ttrp_set_mode },
{ UNIT_ATTABLE+UNIT_ASC+UNIT_UASC, UNIT_ATTABLE+UNIT_ASC+UNIT_UASC, "Unix ASCII", "UASCII",
&ttrp_set_mode },
{ MTAB_XTD|MTAB_VUN|MTAB_NMO, 1, NULL, "START", &ttrp_set_start_stop },
{ MTAB_XTD|MTAB_VUN|MTAB_NMO, 0, NULL, "STOP", &ttrp_set_start_stop },
{ 0 }
};
DEVICE tty_dev = {
"TTY", tty_unit, tty_reg, tty_mod,
4, 10, 31, 1, 8, 8,
NULL, NULL, &tty_reset,
NULL, &pt_attach, &pt_detach,
&tty_dib, 0
};
/* CLK data structures
clk_dev CLK device descriptor
clk_unit CLK unit descriptor
clk_mod CLK modifiers
clk_reg CLK register list
*/
DIB clk_dib = { CLK_KEYS, IOBUS, 1, &clkio };
UNIT clk_unit = { UDATA (&clk_svc, 0, 0), 16000 };
REG clk_reg[] = {
{ FLDATA (READY, dev_int, INT_V_CLK) },
{ FLDATA (ENABLE, dev_enb, INT_V_CLK) },
{ DRDATA (TIME, clk_unit.wait, 24), REG_NZ + PV_LEFT },
{ DRDATA (TPS, clk_tps, 8), PV_LEFT + REG_HRO },
{ NULL }
};
MTAB clk_mod[] = {
{ MTAB_XTD|MTAB_VDV, 50, NULL, "50HZ",
&clk_set_freq, NULL, NULL },
{ MTAB_XTD|MTAB_VDV, 60, NULL, "60HZ",
&clk_set_freq, NULL, NULL },
{ MTAB_XTD|MTAB_VDV, 0, "FREQUENCY", NULL,
NULL, &clk_show_freq, NULL },
{ 0 }
};
DEVICE clk_dev = {
"CLK", &clk_unit, clk_reg, clk_mod,
1, 0, 0, 0, 0, 0,
NULL, NULL, &clk_reset,
NULL, NULL, NULL,
&clk_dib, 0
};
/* Paper tape reader: IO routine */
int32 ptrio (int32 inst, int32 fnc, int32 dat, int32 dev)
{
switch (inst) { /* case on opcode */
case ioOCP: /* OCP */
if ((fnc & 016) != 0) /* only fnc 0,1 */
return IOBADFNC (dat);
ptr_motion = fnc ^ 1;
if (fnc != 0) /* fnc 1? stop */
sim_cancel (&ptr_unit);
else sim_activate (&ptr_unit, ptr_unit.wait); /* fnc 0? start */
break;
case ioSKS: /* SKS */
if ((fnc & 013) != 0) /* only fnc 0,4 */
return IOBADFNC (dat);
if (((fnc == 000) && TST_INT (INT_PTR)) || /* fnc 0? skip rdy */
((fnc == 004) && !TST_INTREQ (INT_PTR))) /* fnc 4? skip !int */
return IOSKIP (dat);
break;
case ioINA: /* INA */
if (fnc != 0) /* only fnc 0 */
return IOBADFNC (dat);
if (TST_INT (INT_PTR)) { /* ready? */
CLR_INT (INT_PTR); /* clear ready */
if (ptr_motion) /* if motion, restart */
sim_activate (&ptr_unit, ptr_unit.wait);
return IOSKIP (ptr_unit.buf | dat); /* ret buf, skip */
}
break;
} /* end case op */
return dat;
}
/* Unit service */
t_stat ptr_svc (UNIT *uptr)
{
int32 c;
if ((uptr->flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (ptr_stopioe, SCPE_UNATT);
if (uptr->STA & LF_PEND) { /* lf pending? */
uptr->STA &= ~LF_PEND; /* clear flag */
c = 0212; /* insert LF */
}
else {
if ((c = getc (uptr->fileref)) == EOF) { /* read byte */
if (feof (uptr->fileref)) {
if (ptr_stopioe)
printf ("PTR end of file\n");
else return SCPE_OK;
}
else perror ("PTR I/O error");
clearerr (uptr->fileref);
return SCPE_IOERR;
}
if ((uptr->flags & UNIT_UASC) && (c == '\n')) { /* Unix newline? */
c = 0215; /* insert CR */
uptr->STA |= LF_PEND; /* lf pending */
}
else if ((uptr->flags & UNIT_ASC) && (c != 0)) /* ASCII? */
c = c | 0200;
uptr->pos = ftell (uptr->fileref); /* update pos */
}
SET_INT (INT_PTR); /* set ready flag */
uptr->buf = c & 0377; /* get byte */
return SCPE_OK;
}
/* Paper tape attach routine - set or clear ASC/UASC flags if specified
Can be called for TTY units at well, hence, check for attachability */
t_stat pt_attach (UNIT *uptr, char *cptr)
{
t_stat r;
if (!(uptr->flags & UNIT_ATTABLE)) /* not tti,tto */
return SCPE_NOFNC;
if (r = attach_unit (uptr, cptr))
return r;
if (sim_switches & SWMASK ('A')) /* -a? ASCII */
uptr->flags |= UNIT_ASC;
else if (sim_switches & SWMASK ('U')) /* -u? Unix ASCII */
uptr->flags |= (UNIT_ASC|UNIT_UASC);
else if (sim_switches & SWMASK ('B')) /* -b? binary */
uptr->flags &= ~(UNIT_ASC|UNIT_UASC);
uptr->STA = 0;
return r;
}
/* Detach routine - stop motion if not restore */
t_stat pt_detach (UNIT *uptr)
{
if (!(uptr->flags & UNIT_ATTABLE)) /* not tti,tto */
return SCPE_NOFNC;
if (!(sim_switches & SIM_SW_REST)) /* stop motion */
sim_cancel (uptr);
uptr->STA = 0;
return detach_unit (uptr);
}
/* Reset routine */
t_stat ptr_reset (DEVICE *dptr)
{
CLR_INT (INT_PTR); /* clear ready, enb */
CLR_ENB (INT_PTR);
ptr_unit.buf = 0; /* clear buffer */
ptr_unit.STA = 0;
ptr_motion = 0; /* unit stopped */
sim_cancel (&ptr_unit); /* deactivate unit */
return SCPE_OK;
}
/* Paper tape reader bootstrap routine */
#define PBOOT_START 1
#define PBOOT_SIZE (sizeof (pboot) / sizeof (int32))
static const int32 pboot[] = {
0010057, /* STA 57 */
0030001, /* OCP 1 */
0131001, /* READ, INA 1001 */
0002003, /* JMP READ */
0101040, /* SNZ */
0002003, /* JMP READ */
0010000, /* STA 0 */
0131001, /* READ1, INA 1001 */
0002010, /* JMP READ1 */
0041470, /* LGL 8 */
0130001, /* READ2, INA 1 */
0002013, /* JMP READ2 */
0110000, /* STA* 0 */
0024000, /* IRS 0 */
0100040 /* SZE */
};
t_stat ptr_boot (int32 unitno, DEVICE *dptr)
{
int32 i;
for (i = 0; i < PBOOT_SIZE; i++) /* copy bootstrap */
M[PBOOT_START + i] = pboot[i];
PC = PBOOT_START;
return SCPE_OK;
}
/* Paper tape punch: IO routine */
int32 ptpio (int32 inst, int32 fnc, int32 dat, int32 dev)
{
switch (inst) { /* case on opcode */
case ioOCP: /* OCP */
if ((fnc & 016) != 0) /* only fnc 0,1 */
return IOBADFNC (dat);
if (fnc != 0) { /* fnc 1? pwr off */
CLR_INT (INT_PTP); /* not ready */
ptp_power = 0; /* turn off power */
sim_cancel (&ptp_unit); /* stop punch */
}
else if (ptp_power == 0) /* fnc 0? start */
sim_activate (&ptp_unit, ptp_ptime);
break;
case ioSKS: /* SKS */
if (((fnc & 012) !=0) || (fnc == 005)) /* only 0, 1, 4 */
return IOBADFNC (dat);
if (((fnc == 000) && TST_INT (INT_PTP)) || /* fnc 0? skip rdy */
((fnc == 001) && /* fnc 1? skip ptp on */
(ptp_power || sim_is_active (&ptp_unit))) ||
((fnc == 004) && !TST_INTREQ (INT_PTP))) /* fnc 4? skip !int */
return IOSKIP (dat);
break;
case ioOTA: /* OTA */
if (fnc != 0) /* only fnc 0 */
return IOBADFNC (dat);
if (TST_INT (INT_PTP)) { /* if ptp ready */
CLR_INT (INT_PTP); /* clear ready */
ptp_unit.buf = dat & 0377; /* store byte */
sim_activate (&ptp_unit, ptp_unit.wait);
return IOSKIP (dat); /* skip return */
}
break;
}
return dat;
}
/* Unit service */
t_stat ptp_svc (UNIT *uptr)
{
int32 c;
SET_INT (INT_PTP); /* set flag */
if (ptp_power == 0) { /* power on? */
ptp_power = 1; /* ptp is ready */
return SCPE_OK;
}
if ((uptr->flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (ptp_stopioe, SCPE_UNATT);
if (uptr->flags & UNIT_ASC) { /* ASCII? */
c = uptr->buf & 0177; /* mask to 7b */
if ((uptr->flags & UNIT_UASC) && (c == 015)) /* cr? drop if Unix */
return SCPE_OK;
else if (c == 012) /* lf? cvt to nl */
c = '\n';
}
else c = uptr->buf & 0377; /* no, binary */
if (putc (c, uptr->fileref) == EOF) { /* output byte */
perror ("PTP I/O error");
clearerr (uptr->fileref);
return SCPE_IOERR;
}
uptr->pos = ftell (uptr->fileref); /* update pos */
return SCPE_OK;
}
/* Reset routine */
t_stat ptp_reset (DEVICE *dptr)
{
CLR_INT (INT_PTP); /* clear ready, enb */
CLR_ENB (INT_PTP);
ptp_power = 0; /* power off */
ptp_unit.buf = 0; /* clear buffer */
ptp_unit.STA = 0;
sim_cancel (&ptp_unit); /* deactivate unit */
return SCPE_OK;
}
/* Terminal: IO routine */
int32 ttyio (int32 inst, int32 fnc, int32 dat, int32 dev)
{
switch (inst) { /* case on opcode */
case ioOCP: /* OCP */
if ((fnc & 016) != 0) /* only fnc 0,1 */
return IOBADFNC (dat);
if (fnc != 0) { /* output */
tty_ready = 1; /* set rdy, busy */
tty_busy = 1; /* start dummy out */
tty_mode = 1; /* mode is output */
sim_activate (&tty_unit[TTO], tty_unit[TTO].wait);
}
else { /* input? */
tty_ready = 0; /* clr rdy, busy */
tty_busy = 0;
tty_mode = 0; /* mode is input */
tty_2nd = 0;
/* sim_cancel (&tty_unit[TTO]); /* cancel output */
}
CLR_INT (INT_TTY); /* clear intr */
break;
case ioSKS: /* SKS */
if ((fnc & 012) != 0) /* fnc 0,1,4,5 */
return IOBADFNC (dat);
if (((fnc == 000) && tty_ready) || /* fnc 0? skip rdy */
((fnc == 001) && !tty_busy) || /* fnc 1? skip !busy */
((fnc == 004) && !TST_INTREQ (INT_TTY)) || /* fnc 4? skip !int */
((fnc == 005) && (tty_mode || /* fnc 5? skip !xoff */
((tty_buf & 0177) != XOFF)))) /* input & XOFF char */
return IOSKIP (dat);
break;
case ioINA: /* INA */
if ((fnc & 005) != 0) /* only 0,2 */
return IOBADFNC (dat);
if (tty_ready) { /* ready? */
tty_ready = 0; /* clear rdy */
CLR_INT (INT_TTY); /* no interrupt */
return IOSKIP (dat |
(tty_buf & ((fnc & 002)? 077: 0377)));
}
break;
case ioOTA:
if ((fnc & 015) != 0) /* only 0,2 */
return IOBADFNC (dat);
if (tty_ready) { /* ready? */
tty_buf = dat & 0377; /* store char */
if (fnc & 002) { /* binary mode? */
tty_buf = tty_buf | 0100; /* set ch 7 */
if (tty_buf & 040)
tty_buf = tty_buf & 0277;
}
tty_ready = 0; /* clear ready */
tty_busy = 1; /* set busy */
CLR_INT (INT_TTY); /* clr int */
sim_activate (&tty_unit[TTO], tty_unit[TTO].wait);
return IOSKIP (dat);
}
break;
} /* end case op */
return dat;
}
/* Input service - keyboard and reader */
t_stat tti_svc (UNIT *uptr)
{
int32 out, c;
UNIT *ruptr = &tty_unit[TTR];
sim_activate (uptr, uptr->wait); /* continue poll */
if (tty_2nd) { /* char pending? */
tty_buf = tty_2nd & 0377;
tty_2nd = 0;
tty_busy = 0; /* clr busy */
tty_ready = 1; /* set ready */
SET_INT (INT_TTY); /* set int */
return SCPE_OK;
}
if ((c = sim_poll_kbd ()) >= SCPE_KFLAG) { /* character? */
out = c & 0177; /* mask echo to 7b */
if (c & SCPE_BREAK) /* break? */
c = 0;
else c = sim_tt_inpcvt (c, TT_GET_MODE (uptr->flags) | TTUF_KSR);
uptr->pos = uptr->pos + 1;
}
else if (c != SCPE_OK) /* error? */
return c;
else if ((ruptr->flags & UNIT_ATT) && /* TTR attached */
(ruptr->STA & RUNNING)) { /* and running? */
if (ruptr->STA & LF_PEND) { /* lf pending? */
c = 0212; /* char is lf */
ruptr->STA &= ~LF_PEND; /* clear flag */
}
else { /* normal read */
if ((c = getc (ruptr->fileref)) == EOF) { /* read byte */
if (feof (ruptr->fileref)) { /* EOF? */
ruptr->STA &= ~RUNNING; /* stop reader */
if (ttr_stopioe)
printf ("TTR end of file\n");
else return SCPE_OK;
}
else perror ("TTR I/O error");
clearerr (ruptr->fileref);
return SCPE_IOERR;
}
if ((ruptr->flags & UNIT_UASC) && (c == '\n')) {
c = 0215; /* Unix ASCII NL? */
ruptr->STA |= LF_PEND; /* LF pending */
}
else if ((ruptr->flags & UNIT_ASC) && (c != 0))
c = c | 0200; /* ASCII nz? cvt */
ruptr->pos = ftell (ruptr->fileref);
}
if (ttr_xoff_read != 0) { /* reader stopping? */
if (c == RUBOUT) /* rubout? stop */
ttr_xoff_read = 0;
else ttr_xoff_read--; /* else decr state */
if (ttr_xoff_read == 0) /* delay done? */
ruptr->STA &= ~RUNNING; /* stop reader */
}
else if ((c & 0177) == XOFF) /* XOFF read? */
ttr_xoff_read = 2;
out = c; /* echo char */
}
else return SCPE_OK; /* no char */
tto_write (out); /* echo to printer */
ttp_write (out); /* and punch */
if (tty_mode == 0) { /* input mode? */
tty_2nd = (c & 0377) | 0400; /* flag 2nd state */
tty_busy = 1; /* set busy */
CLR_INT (INT_TTY); /* clear interrupt */
sim_activate_abs (uptr, tty_busy_wait); /* sched busy period */
}
return SCPE_OK;
}
/* Output service - printer and punch */
t_stat tto_svc (UNIT *uptr)
{
uint32 c7b;
UNIT *ruptr = &tty_unit[TTR];
UNIT *puptr = &tty_unit[TTP];
t_stat r;
if ((tty_ready != 0) && (tty_busy != 0)) { /* dummy cycle? */
tty_busy = 0; /* clr busy */
SET_INT (INT_TTY); /* set intr */
return SCPE_OK;
}
c7b = tty_buf & 0177;
if (ttp_tape_rcvd != 0) { /* prev = tape? */
ttp_tape_rcvd--; /* decrement state */
if ((ttp_tape_rcvd == 0) && (puptr->flags & UNIT_ATT))
puptr->STA |= RUNNING; /* start after delay */
}
else if (c7b == TAPE) /* char = TAPE? */
ttp_tape_rcvd = 2;
if (ttp_xoff_rcvd != 0) { /* prev = XOFF? */
ttp_xoff_rcvd--; /* decrement state */
if (ttp_xoff_rcvd == 0) /* stop after delay */
puptr->STA &= ~RUNNING;
}
else if (c7b == XOFF) /* char = XOFF? */
ttp_xoff_rcvd = 2;
if ((c7b == XON) && (ruptr->flags & UNIT_ATT)) { /* char = XON? */
ruptr->STA |= RUNNING; /* start reader */
ttr_xoff_read = 0; /* cancel stop */
}
if ((r = tto_write (tty_buf)) != SCPE_OK) { /* print; error? */
sim_activate (uptr, uptr->wait); /* try again */
return ((r == SCPE_STALL)? SCPE_OK: r); /* !stall? report */
}
if ((r = ttp_write (tty_buf)) != SCPE_OK) /* punch; error? */
return r;
tty_busy = 0; /* clr busy, set rdy */
tty_ready = 1;
SET_INT (INT_TTY); /* set intr */
return SCPE_OK;
}
/* Output to printer */
t_stat tto_write (int32 c)
{
UNIT *tuptr = &tty_unit[TTO];
c = sim_tt_outcvt (c, TT_GET_MODE (tuptr->flags) | TTUF_KSR);
tuptr->pos = tuptr->pos + 1;
if (c >= 0)
return sim_putchar_s (c);
else return SCPE_OK;
}
/* Output to punch */
t_stat ttp_write (int32 c)
{
uint32 p, c7b;
UNIT *puptr = &tty_unit[TTP];
if ((puptr->flags & UNIT_ATT) && /* TTP attached */
(puptr->STA & RUNNING)) { /* and running? */
c7b = c & 0177;
if (!(puptr->flags & UNIT_UASC) || (c7b != 015)) {
if (puptr->flags & UNIT_ASC) { /* ASCII? */
if (c7b == 012) p = '\n'; /* cvt LF */
else p = c7b; /* else 7b */
}
else p = c; /* untouched */
if (putc (p, puptr->fileref) == EOF) { /* output byte */
perror ("TTP I/O error");
clearerr (puptr->fileref);
return SCPE_IOERR;
}
puptr->pos = ftell (puptr->fileref); /* update pos */
}
}
return SCPE_OK;
}
/* Reset routine */
t_stat tty_reset (DEVICE *dptr)
{
CLR_INT (INT_TTY); /* clear ready, enb */
CLR_ENB (INT_TTY);
tty_mode = 0; /* mode = input */
tty_buf = 0;
tty_2nd = 0;
tty_ready = 1;
tty_busy = 0;
ttr_xoff_read = 0; /* clr TTR, TTP flags */
ttp_tape_rcvd = 0;
ttp_xoff_rcvd = 0;
tty_unit[TTR].STA = 0;
tty_unit[TTP].STA = 0;
sim_activate (&tty_unit[TTI], tty_unit[TTI].wait); /* activate poll */
sim_cancel (&tty_unit[TTO]); /* cancel output */
return SCPE_OK;
}
/* Set keyboard/printer mode - make sure flags agree */
t_stat ttio_set_mode (UNIT *uptr, int32 val, char *cptr, void *desc)
{
if (uptr->flags & UNIT_ATTABLE) /* not TTR, TTP */
return SCPE_NOFNC;
tty_unit[TTO].flags = (tty_unit[TTO].flags & ~TT_MODE) | val;
if (val == TT_MODE_7P)
val = TT_MODE_7B;
tty_unit[TTI].flags = (tty_unit[TTI].flags & ~TT_MODE) | val;
return SCPE_OK;
}
/* Set reader/punch mode */
t_stat ttrp_set_mode (UNIT *uptr, int32 val, char *cptr, void *desc)
{
if (!(uptr->flags & UNIT_ATTABLE)) /* PTR, PTP, TTR, TTP only */
return SCPE_NOFNC;
if (!(val & UNIT_UASC))
uptr->STA &= ~LF_PEND;
return SCPE_OK;
}
/* Set reader/punch start/stop */
t_stat ttrp_set_start_stop (UNIT *uptr, int32 val, char *cptr, void *desc)
{
if (!(uptr->flags & UNIT_ATTABLE)) /* TTR, TTP only */
return SCPE_NOFNC;
if (!(uptr->flags & UNIT_ATT)) /* must be attached */
return SCPE_UNATT;
if (val != 0) /* start? set running */
uptr->STA |= RUNNING;
else uptr->STA &= ~RUNNING; /* stop? clr running */
if ((uptr->flags & UNIT_ROABLE) != 0) /* TTR? cancel stop */
ttr_xoff_read = 0;
else ttp_tape_rcvd = ttp_xoff_rcvd = 0; /* TTP? cancel all */
return SCPE_OK;
}
/* Clock/options: IO routine */
int32 clkio (int32 inst, int32 fnc, int32 dat, int32 dev)
{
switch (inst) { /* case on opcode */
case ioOCP: /* OCP */
if ((fnc & 015) != 0) /* only fnc 0,2 */
return IOBADFNC (dat);
CLR_INT (INT_CLK); /* reset ready */
if (fnc != 0) /* fnc = 2? stop */
sim_cancel (&clk_unit);
else { /* fnc = 0? */
if (!sim_is_active (&clk_unit))
sim_activate (&clk_unit, /* activate */
sim_rtc_init (clk_unit.wait)); /* init calibr */
}
break;
case ioSKS: /* SKS */
if (fnc == 000) { /* clock skip !int */
if (!TST_INTREQ (INT_CLK))
return IOSKIP (dat);
}
else if ((fnc & 007) == 002) { /* mem parity? */
if (((fnc == 002) && !TST_INT (INT_MPE)) ||
((fnc == 012) && TST_INT (INT_MPE)))
return IOSKIP (dat);
}
else return IOBADFNC (dat); /* invalid fnc */
break;
case ioOTA: /* OTA */
if (fnc == 000) /* SMK */
dev_enb = dat;
else if (fnc == 010) { /* OTK */
C = (dat >> 15) & 1; /* set C */
if (cpu_unit.flags & UNIT_HSA) /* HSA included? */
dp = (dat >> 14) & 1; /* set dp */
if (cpu_unit.flags & UNIT_EXT) { /* ext opt? */
if (dat & 020000) { /* ext set? */
ext = 1; /* yes, set */
extoff_pending = 0;
}
else extoff_pending = 1; /* no, clr later */
}
sc = dat & 037; /* set sc */
}
else return IOBADFNC (dat);
break;
}
return dat;
}
/* Unit service */
t_stat clk_svc (UNIT *uptr)
{
M[M_CLK] = (M[M_CLK] + 1) & DMASK; /* increment mem ctr */
if (M[M_CLK] == 0) /* = 0? set flag */
SET_INT (INT_CLK);
sim_activate (&clk_unit, sim_rtc_calb (clk_tps)); /* reactivate */
return SCPE_OK;
}
/* Reset routine */
t_stat clk_reset (DEVICE *dptr)
{
CLR_INT (INT_CLK); /* clear ready, enb */
CLR_ENB (INT_CLK);
sim_cancel (&clk_unit); /* deactivate unit */
return SCPE_OK;
}
/* Set frequency */
t_stat clk_set_freq (UNIT *uptr, int32 val, char *cptr, void *desc)
{
if (cptr)
return SCPE_ARG;
if ((val != 50) && (val != 60))
return SCPE_IERR;
clk_tps = val;
return SCPE_OK;
}
/* Show frequency */
t_stat clk_show_freq (FILE *st, UNIT *uptr, int32 val, void *desc)
{
fprintf (st, (clk_tps == 50)? "50Hz": "60Hz");
return SCPE_OK;
}
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