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simh-testsetgenerator/HP2100/hp2100_stddev.c
Bob Supnik 701f0fe028 Notes For V2.8 
1. New Features

1.1 Directory and documentation

- Only common files (SCP and libraries) are in the top level
  directory.  Individual simulator files are in their individual
  directories.
- simh_doc.txt has been split up.  simh_doc.txt now documents
  only SCP.  The individual simulators are documented in separate
  text files in their own directories.
- mingw_build.bat is a batch file for the MINGW/gcc environment
  that will build all the simulators, assuming the root directory
  structure is at c:\sim.
- Makefile is a UNIX make file for the gcc environment that will
  build all the simulators, assuming the root directory is at
  c:\sim.

1.2 SCP

- DO <file name> executes the SCP commands in the specified file.
- Replicated registers in unit structures can now be declared as
  arrays for examine, modify, save, and restore.  Most replicated
  unit registers (for example, mag tape position registers) have
  been changed to arrays.
- The ADD/REMOVE commands have been replaced by SET unit ONLINE
  and SET unit OFFLINE, respectively.
- Register names that are unique within an entire simulator do
  not have to be prefaced with the device name.
- The ATTACH command can attach files read only, either under
  user option (-r), or because the attached file is ready only.
- The SET/SHOW capabilities have been extended.  New forms include:

	SET <dev> param{=value}{ param ...}
	SET <unit> param{=value}{ param ...}
	SHOW <dev> {param param ...}
	SHOW <unit> {param param ...}

- Multiple breakpoints have been implemented.  Breakpoints are
  set/cleared/displayed by:

	BREAK addr_list{[count]}
	NOBREAK addr_list
	SHOW BREAK addr_list

1.3 PDP-11 simulator

- Unibus map implemented, with 22b RP controller (URH70) or 18b
  RP controller (URH11) (in debug).
- All DMA peripherals rewritten to use map.
- Many peripherals modified for source sharing with VAX.
- RQDX3 implemented.
- Bugs fixed in RK11 and RL11 write check.

1.4 PDP-10 simulator

- ITS 1-proceed implemented.
- Bugs fixed in ITS PC sampling and LPMR

1.5 18b PDP simulator

- Interrupts split out to multiple levels to allow easier
  expansion.

1.5 IBM System 3 Simulator

- Written by Charles (Dutch) Owen.

1.6 VAX Simulator (in debug)

- Simulates MicroVAX 3800 (KA655) with 16MB-64MB memory, RQDX3,
  RLV12, TSV11, DZV11, LPV11, PCV11.
- CDROM capability has been added to the RQDX3, to allow testing
  with VMS hobbyist images.

1.7 SDS 940 Simulator (not tested)

- Simulates SDS 940, 16K-64K memory, fixed and moving head
  disk, magtape, line printer, console.

1.8 Altair Z80

- Revised from Charles (Dutch) Owen's original by Peter Schorn.
- MITS 8080 with full Z80 simulation.
- 4K and 8K BASIC packages, Prolog package.

1.9 Interdata

The I4 simulator has been withdrawn for major rework.  Look for
a complete 16b/32b Interdata simulator sometime next year.

2. Release Notes

2.1 SCP

SCP now allows replicated registers in unit structures to be
modelled as arrays.  All replicated register declarations have
been replaced by register array declarations.  As a result,
save files from prior revisions will generate errors after
restoring main memory.

2.2 PDP-11

The Unibus map code is in debug.  The map was implemented primarily
to allow source sharing with the VAX, which requires a DMA map.
DMA devices work correctly with the Unibus map disabled.

The RQDX3 simulator has run a complete RSTS/E SYSGEN, with multiple
drives, and booted the completed system from scratch.

2.3 VAX

The VAX simulator will run the boot code up to the >>> prompt.  It
can successfully process a SHOW DEVICE command.  It runs the HCORE
instruction diagnostic.  It can boot the hobbyist CD through SYSBOOT
and through the date/time dialog and restore the hobbyist CD, using
standalone backup.  On the boot of the restored disk, it gets to the
date/time dialog, and then crashes.

2.4 SDS 940

The SDS 940 is untested, awaiting real code.

2.5 GCC Optimization

At -O2 and above, GCC does not correctly compile the simulators which
use setjmp-longjmp (PDP-11, PDP-10, VAX).  A working hypothesis is
that optimized state maintained in registers is being used in the
setjmp processing routine.  On the PDP-11 and PDP-10, all of this
state has been either made global, or volatile, to encourage GCC to
keep the state up to date in memory.  The VAX is still vulnerable.

3. Work list

3.1 SCP

- Better ENABLE/DISABLE.

3.2 PDP-11 RQDX3

Software mapped mode, RCT read simulation, VMS debug.
2011-04-15 08:33:38 -07:00

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/* hp2100_stddev.c: HP2100 standard devices
Copyright (c) 1993-2001, 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 12597A-002 paper tape reader
ptp 12597A-005 paper tape punch
tty 12531C buffered teleprinter interface
clk 12539A/B/C time base generator
03-Nov-01 RMS Changed DEVNO to use extended SET/SHOW
29-Nov-01 RMS Added read only unit support
24-Nov-01 RMS Changed TIME to an array
07-Sep-01 RMS Moved function prototypes
21-Nov-00 RMS Fixed flag, buffer power up state
Added status input for ptp, tty
15-Oct-00 RMS Added dynamic device number support
The reader and punch, like most HP devices, have a command flop. The
teleprinter and clock do not.
*/
#include "hp2100_defs.h"
#include <ctype.h>
#define UNIT_V_UC (UNIT_V_UF + 1) /* UC only */
#define UNIT_UC (1 << UNIT_V_UC)
#define PTP_LOW 0000040 /* low tape */
#define TM_MODE 0100000 /* mode change */
#define TM_KBD 0040000 /* enable keyboard */
#define TM_PRI 0020000 /* enable printer */
#define TM_PUN 0010000 /* enable punch */
#define TP_BUSY 0100000 /* busy */
#define CLK_V_ERROR 4 /* clock overrun */
#define CLK_ERROR (1 << CLK_V_ERROR)
extern uint16 M[];
extern int32 PC;
extern int32 dev_cmd[2], dev_ctl[2], dev_flg[2], dev_fbf[2];
extern UNIT cpu_unit;
extern struct hpdev infotab[];
int32 ptr_stopioe = 0, ptp_stopioe = 0; /* stop on error */
int32 ttp_stopioe = 0;
int32 tty_buf = 0, tty_mode = 0; /* tty buffer, mode */
int32 clk_select = 0; /* clock time select */
int32 clk_error = 0; /* clock error */
int32 clk_delay[8] = /* clock intervals */
{ 50, 500, 5000, 50000, 500000, 5000000, 50000000, 50000000 };
t_stat ptr_svc (UNIT *uptr);
t_stat ptr_reset (DEVICE *dptr);
t_stat ptr_boot (int32 unitno);
t_stat ptp_svc (UNIT *uptr);
t_stat ptp_reset (DEVICE *dptr);
t_stat tti_svc (UNIT *uptr);
t_stat tto_svc (UNIT *uptr);
t_stat tty_reset (DEVICE *dptr);
t_stat clk_svc (UNIT *uptr);
t_stat clk_reset (DEVICE *dptr);
/* PTR data structures
ptr_dev PTR device descriptor
ptr_unit PTR unit descriptor
ptr_mod PTR modifiers
ptr_reg PTR register list
*/
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 (CMD, infotab[inPTR].cmd, 0) },
{ FLDATA (CTL, infotab[inPTR].ctl, 0) },
{ FLDATA (FLG, infotab[inPTR].flg, 0) },
{ FLDATA (FBF, infotab[inPTR].fbf, 0) },
{ DRDATA (POS, ptr_unit.pos, 31), PV_LEFT },
{ DRDATA (TIME, ptr_unit.wait, 24), PV_LEFT },
{ FLDATA (STOP_IOE, ptr_stopioe, 0) },
{ ORDATA (DEVNO, infotab[inPTR].devno, 6), REG_RO },
{ NULL } };
MTAB ptr_mod[] = {
{ MTAB_XTD | MTAB_VDV, inPTR, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, NULL },
{ 0 } };
DEVICE ptr_dev = {
"PTR", &ptr_unit, ptr_reg, ptr_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &ptr_reset,
&ptr_boot, NULL, NULL };
/* PTP data structures
ptp_dev PTP device descriptor
ptp_unit PTP unit descriptor
ptp_mod PTP modifiers
ptp_reg PTP register list
*/
UNIT ptp_unit = {
UDATA (&ptp_svc, UNIT_SEQ+UNIT_ATTABLE, 0), SERIAL_OUT_WAIT };
REG ptp_reg[] = {
{ ORDATA (BUF, ptp_unit.buf, 8) },
{ FLDATA (CMD, infotab[inPTP].cmd, 0) },
{ FLDATA (CTL, infotab[inPTP].ctl, 0) },
{ FLDATA (FLG, infotab[inPTP].flg, 0) },
{ FLDATA (FBF, infotab[inPTP].fbf, 0) },
{ DRDATA (POS, ptp_unit.pos, 31), PV_LEFT },
{ DRDATA (TIME, ptp_unit.wait, 24), PV_LEFT },
{ FLDATA (STOP_IOE, ptp_stopioe, 0) },
{ ORDATA (DEVNO, infotab[inPTP].devno, 6), REG_RO },
{ NULL } };
MTAB ptp_mod[] = {
{ MTAB_XTD | MTAB_VDV, inPTP, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, NULL },
{ 0 } };
DEVICE ptp_dev = {
"PTP", &ptp_unit, ptp_reg, ptp_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &ptp_reset,
NULL, NULL, NULL };
/* 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 TTP 2
UNIT tty_unit[] = {
{ UDATA (&tti_svc, UNIT_UC, 0), KBD_POLL_WAIT },
{ UDATA (&tto_svc, 0, 0), SERIAL_OUT_WAIT },
{ UDATA (&tto_svc, UNIT_SEQ+UNIT_ATTABLE, 0), SERIAL_OUT_WAIT } };
REG tty_reg[] = {
{ ORDATA (BUF, tty_buf, 8) },
{ ORDATA (MODE, tty_mode, 16) },
{ FLDATA (CMD, infotab[inTTY].cmd, 0), REG_HRO },
{ FLDATA (CTL, infotab[inTTY].ctl, 0) },
{ FLDATA (FLG, infotab[inTTY].flg, 0) },
{ FLDATA (FBF, infotab[inTTY].fbf, 0) },
{ DRDATA (KPOS, tty_unit[TTI].pos, 31), PV_LEFT },
{ DRDATA (KTIME, tty_unit[TTI].wait, 24), REG_NZ + PV_LEFT },
{ DRDATA (TPOS, tty_unit[TTO].pos, 31), PV_LEFT },
{ DRDATA (TTIME, tty_unit[TTO].wait, 24), REG_NZ + PV_LEFT },
{ DRDATA (PPOS, tty_unit[TTP].pos, 31), PV_LEFT },
{ FLDATA (STOP_IOE, ttp_stopioe, 0) },
{ ORDATA (DEVNO, infotab[inTTY].devno, 6), REG_RO },
{ FLDATA (UC, tty_unit[TTI].flags, UNIT_V_UC), REG_HRO },
{ NULL } };
MTAB tty_mod[] = {
{ UNIT_UC, 0, "lower case", "LC", NULL },
{ UNIT_UC, UNIT_UC, "upper case", "UC", NULL },
{ MTAB_XTD | MTAB_VDV, inTTY, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, NULL },
{ 0 } };
DEVICE tty_dev = {
"TTY", tty_unit, tty_reg, tty_mod,
3, 10, 31, 1, 8, 8,
NULL, NULL, &tty_reset,
NULL, NULL, NULL };
/* CLK data structures
clk_dev CLK device descriptor
clk_unit CLK unit descriptor
clk_mod CLK modifiers
clk_reg CLK register list
*/
UNIT clk_unit = {
UDATA (&clk_svc, 0, 0) };
REG clk_reg[] = {
{ ORDATA (SEL, clk_select, 3) },
{ FLDATA (CMD, infotab[inCLK].cmd, 0), REG_HRO },
{ FLDATA (CTL, infotab[inCLK].ctl, 0) },
{ FLDATA (FLG, infotab[inCLK].flg, 0) },
{ FLDATA (FBF, infotab[inCLK].fbf, 0) },
{ FLDATA (ERR, clk_error, CLK_V_ERROR) },
{ BRDATA (TIME, clk_delay, 8, 31, 8) },
{ ORDATA (DEVNO, infotab[inCLK].devno, 6), REG_RO },
{ NULL } };
MTAB clk_mod[] = {
{ MTAB_XTD | MTAB_VDV, inCLK, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, 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 };
/* Paper tape reader: IOT routine */
int32 ptrio (int32 inst, int32 IR, int32 dat)
{
int32 dev;
dev = IR & DEVMASK; /* get device no */
switch (inst) { /* case on opcode */
case ioFLG: /* flag clear/set */
if ((IR & HC) == 0) { setFLG (dev); } /* STF */
break;
case ioSFC: /* skip flag clear */
if (FLG (dev) == 0) PC = (PC + 1) & AMASK;
return dat;
case ioSFS: /* skip flag set */
if (FLG (dev) != 0) PC = (PC + 1) & AMASK;
return dat;
case ioMIX: /* merge */
dat = dat | ptr_unit.buf;
break;
case ioLIX: /* load */
dat = ptr_unit.buf;
break;
case ioCTL: /* control clear/set */
if (IR & AB) { /* CLC */
clrCMD (dev); /* clear cmd, ctl */
clrCTL (dev); }
else { setCMD (dev); /* STC */
setCTL (dev); /* set cmd, ctl */
sim_activate (&ptr_unit, ptr_unit.wait); }
break;
default:
break; }
if (IR & HC) { clrFLG (dev); } /* H/C option */
return dat;
}
/* Unit service */
t_stat ptr_svc (UNIT *uptr)
{
int32 dev, temp;
dev = infotab[inPTR].devno; /* get device no */
clrCMD (dev); /* clear cmd */
if ((ptr_unit.flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (ptr_stopioe, SCPE_UNATT);
if ((temp = getc (ptr_unit.fileref)) == EOF) { /* read byte */
if (feof (ptr_unit.fileref)) {
if (ptr_stopioe) printf ("PTR end of file\n");
else return SCPE_OK; }
else perror ("PTR I/O error");
clearerr (ptr_unit.fileref);
return SCPE_IOERR; }
setFLG (dev); /* set flag */
ptr_unit.buf = temp & 0377; /* put byte in buf */
ptr_unit.pos = ftell (ptr_unit.fileref);
return SCPE_OK;
}
/* Reset routine - called from SCP, flags in infotab */
t_stat ptr_reset (DEVICE *dptr)
{
infotab[inPTR].cmd = infotab[inPTR].ctl = 0; /* clear cmd, ctl */
infotab[inPTR].flg = infotab[inPTR].fbf = 1; /* set flg, fbf */
ptr_unit.buf = 0;
sim_cancel (&ptr_unit); /* deactivate unit */
return SCPE_OK;
}
/* Paper tape reader bootstrap routine */
#define CHANGE_DEV (1 << 24)
#define PBOOT_MASK 077
#define PBOOT_SIZE (sizeof (pboot) / sizeof (int32))
static const int32 pboot[] = {
0107700, 0063770, 0106501, 0004010,
0002400, 0006020, 0063771, 0073736,
0006401, 0067773, 0006006, 0027717,
0107700, 0102077, 0027700, 0017762,
0002003, 0027712, 0003104, 0073774,
0017762, 0017753, 0070001, 0073775,
0063775, 0043772, 0002040, 0027751,
0017753, 0044000, 0000000, 0002101,
0102000, 0037775, 0037774, 0027730,
0017753, 0054000, 0027711, 0102011,
0027700, 0102055, 0027700, 0000000,
0017762, 0001727, 0073776, 0017762,
0033776, 0127753, 0000000, 0103700+CHANGE_DEV,
0102300+CHANGE_DEV, 0027764, 0102500+CHANGE_DEV, 0127762,
0173775, 0153775, 0170100, 0177765 };
t_stat ptr_boot (int32 unit)
{
int32 i, dev;
dev = infotab[inPTR].devno; /* get device no */
PC = (MEMSIZE - 1) & ~PBOOT_MASK; /* start at mem top */
for (i = 0; i < PBOOT_SIZE; i++) /* copy bootstrap */
M[PC + i] = (pboot[i] & CHANGE_DEV)? /* insert ptr dev no */
((pboot[i] | dev) & DMASK): pboot[i];
return SCPE_OK;
}
/* Paper tape punch: IOT routine */
int32 ptpio (int32 inst, int32 IR, int32 dat)
{
int32 dev;
dev = IR & DEVMASK; /* get device no */
switch (inst) { /* case on opcode */
case ioFLG: /* flag clear/set */
if ((IR & HC) == 0) { setFLG (dev); } /* STF */
break;
case ioSFC: /* skip flag clear */
if (FLG (dev) == 0) PC = (PC + 1) & AMASK;
return dat;
case ioSFS: /* skip flag set */
if (FLG (dev) != 0) PC = (PC + 1) & AMASK;
return dat;
case ioLIX: /* load */
dat = 0;
case ioMIX: /* merge */
if ((ptp_unit.flags & UNIT_ATT) == 0)
dat = dat | PTP_LOW; /* out of tape? */
break;
case ioOTX: /* output */
ptp_unit.buf = dat;
break;
case ioCTL: /* control clear/set */
if (IR & AB) { /* CLC */
clrCMD (dev); /* clear cmd, ctl */
clrCTL (dev); }
else { setCMD (dev); /* STC */
setCTL (dev); /* set cmd, ctl */
sim_activate (&ptp_unit, ptp_unit.wait); }
break;
default:
break; }
if (IR & HC) { clrFLG (dev); } /* H/C option */
return dat;
}
/* Unit service */
t_stat ptp_svc (UNIT *uptr)
{
int32 dev;
dev = infotab[inPTP].devno; /* get device no */
clrCMD (dev); /* clear cmd */
setFLG (dev); /* set flag */
if ((ptp_unit.flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (ptp_stopioe, SCPE_UNATT);
if (putc (ptp_unit.buf, ptp_unit.fileref) == EOF) { /* output byte */
perror ("PTP I/O error");
clearerr (ptp_unit.fileref);
return SCPE_IOERR; }
ptp_unit.pos = ftell (ptp_unit.fileref); /* update position */
return SCPE_OK;
}
/* Reset routine */
t_stat ptp_reset (DEVICE *dptr)
{
infotab[inPTP].cmd = infotab[inPTP].ctl = 0; /* clear cmd, ctl */
infotab[inPTP].flg = infotab[inPTP].fbf = 1; /* set flg, fbf */
ptp_unit.buf = 0;
sim_cancel (&ptp_unit); /* deactivate unit */
return SCPE_OK;
}
/* Terminal: IOT routine */
int32 ttyio (int32 inst, int32 IR, int32 dat)
{
int32 dev;
dev = IR & DEVMASK; /* get device no */
switch (inst) { /* case on opcode */
case ioFLG: /* flag clear/set */
if ((IR & HC) == 0) { setFLG (dev); } /* STF */
break;
case ioSFC: /* skip flag clear */
if (FLG (dev) == 0) PC = (PC + 1) & AMASK;
return dat;
case ioSFS: /* skip flag set */
if (FLG (dev) != 0) PC = (PC + 1) & AMASK;
return dat;
case ioLIX: /* load */
dat = 0;
case ioMIX: /* merge */
dat = dat | tty_buf;
if (!(tty_mode & TM_KBD) && sim_is_active (&tty_unit[TTO]))
dat = dat | TP_BUSY;
break;
case ioOTX: /* output */
if (dat & TM_MODE) tty_mode = dat;
else tty_buf = dat & 0377;
break;
case ioCTL: /* control clear/set */
if (IR & AB) { clrCTL (dev); } /* CLC */
else { setCTL (dev); /* STC */
if (!(tty_mode & TM_KBD)) /* output? */
sim_activate (&tty_unit[TTO], tty_unit[TTO].wait); }
break;
default:
break; }
if (IR & HC) { clrFLG (dev); } /* H/C option */
return dat;
}
/* Unit service routines */
t_stat tto_out (int32 ch)
{
t_stat ret = SCPE_OK;
if (tty_mode & TM_PRI) { /* printing? */
if ((tty_unit[TTI].flags & UNIT_UC) && islower (ch)) /* upper case? */
ch = toupper (ch);
ret = sim_putchar (ch & 0177); /* output char */
tty_unit[TTO].pos = tty_unit[TTO].pos + 1; }
if (tty_mode & TM_PUN) { /* punching? */
if ((tty_unit[TTP].flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (ttp_stopioe, SCPE_UNATT);
if (putc (ch, tty_unit[TTP].fileref) == EOF) { /* output char */
perror ("TTP I/O error");
clearerr (tty_unit[TTP].fileref);
return SCPE_IOERR; }
tty_unit[TTP].pos = ftell (tty_unit[TTP].fileref); }
return ret;
}
t_stat tti_svc (UNIT *uptr)
{
int32 temp, dev;
dev = infotab[inTTY].devno; /* get device no */
sim_activate (&tty_unit[TTI], tty_unit[TTI].wait); /* continue poll */
if ((temp = sim_poll_kbd ()) < SCPE_KFLAG) return temp; /* no char or error? */
temp = temp & 0177;
if ((tty_unit[TTI].flags & UNIT_UC) && islower (temp)) /* force upper case? */
temp = toupper (temp);
if (tty_mode & TM_KBD) { /* keyboard enabled? */
tty_buf = temp; /* put char in buf */
tty_unit[TTI].pos = tty_unit[TTI].pos + 1;
setFLG (dev); /* set flag */
return tto_out (temp); } /* echo or punch? */
return SCPE_OK;
}
t_stat tto_svc (UNIT *uptr)
{
int32 ch, dev;
dev = infotab[inTTY].devno; /* get device no */
setFLG (dev); /* set done flag */
ch = tty_buf;
tty_buf = 0377; /* defang buf */
return tto_out (ch); /* print and/or punch */
}
/* Reset routine */
t_stat tty_reset (DEVICE *dptr)
{
infotab[inTTY].cmd = infotab[inTTY].ctl = 0; /* clear cmd, ctl */
infotab[inTTY].flg = infotab[inTTY].fbf = 1; /* set flg, fbf */
tty_mode = 0;
tty_buf = 0;
sim_activate (&tty_unit[TTI], tty_unit[TTI].wait); /* activate poll */
sim_cancel (&tty_unit[TTO]); /* cancel output */
return SCPE_OK;
}
/* Clock: IOT routine */
int32 clkio (int32 inst, int32 IR, int32 dat)
{
int32 dev;
dev = IR & DEVMASK; /* get device no */
switch (inst) { /* case on opcode */
case ioFLG: /* flag clear/set */
if ((IR & HC) == 0) { setFLG (dev); } /* STF */
break;
case ioSFC: /* skip flag clear */
if (FLG (dev) == 0) PC = (PC + 1) & AMASK;
return dat;
case ioSFS: /* skip flag set */
if (FLG (dev) != 0) PC = (PC + 1) & AMASK;
return dat;
case ioMIX: /* merge */
dat = dat | clk_error;
break;
case ioLIX: /* load */
dat = clk_error;
break;
case ioOTX: /* output */
clk_select = dat & 07;
break;
case ioCTL: /* control clear/set */
if (IR & AB) { /* CLC */
clrCTL (dev); /* turn off clock */
sim_cancel (&clk_unit); } /* deactivate unit */
else { setCTL (dev); /* turn on clock */
clk_error = 0; /* clear error */
sim_activate (&clk_unit, clk_delay[clk_select]); }
break;
default:
break; }
if (IR & HC) { clrFLG (dev); } /* H/C option */
return dat;
}
/* Unit service */
t_stat clk_svc (UNIT *uptr)
{
int32 dev;
dev = infotab[inCLK].devno; /* get device no */
if (FLG (dev)) clk_error = CLK_ERROR; /* overrun? */
setFLG (dev); /* set device flag */
return SCPE_OK;
}
/* Reset routine */
t_stat clk_reset (DEVICE *dptr)
{
infotab[inCLK].cmd = infotab[inCLK].ctl = 0; /* clear cmd, ctl */
infotab[inCLK].flg = infotab[inCLK].fbf = 1; /* set flg, fbf */
clk_error = 0; /* clear error */
clk_select = 0; /* clear select */
sim_cancel (&clk_unit); /* deactivate unit */
return SCPE_OK;
}
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