Rivoreo Source Code Repositories
src.rivoreo.one / emulators / simh / 573f7bce0b19458650218d838c675730a7f48875 / . / HP2100 / hp2100_stddev.c
blob: 5389bdf2619b1dc2777f13ee854b5aea4b6730a9 [file] [log] [blame] [raw]
/* hp2100_stddev.c: HP2100 standard devices simulator
Copyright (c) 1993-2008, 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 interface
PTP 12597A-005 paper tape punch interface
TTY 12531C buffered teleprinter interface
CLK 12539C time base generator
26-Jun-08 JDB Rewrote device I/O to model backplane signals
25-Apr-08 JDB Changed TTY output wait from 100 to 200 for MSU BASIC
18-Apr-08 JDB Removed redundant control char handling definitions
14-Apr-08 JDB Changed TTY console poll to 10 msec. real time
Synchronized CLK with TTY if set for 10 msec.
Added UNIT_IDLE to TTY and CLK
09-Jan-08 JDB Fixed PTR trailing null counter for tape re-read
31-Dec-07 JDB Added IPTICK register to CLK to display CPU instr/tick
Corrected and verified ioCRS actions
28-Dec-06 JDB Added ioCRS state to I/O decoders
22-Nov-05 RMS Revised for new terminal processing routines
13-Sep-04 JDB Added paper tape loop mode, DIAG/READER modifiers to PTR
Added PV_LEFT to PTR TRLLIM register
Modified CLK to permit disable
15-Aug-04 RMS Added tab to control char set (from Dave Bryan)
14-Jul-04 RMS Generalized handling of control char echoing
(from Dave Bryan)
26-Apr-04 RMS Fixed SFS x,C and SFC x,C
Fixed SR setting in IBL
Fixed input behavior during typeout for RTE-IV
Suppressed nulls on TTY output for RTE-IV
Implemented DMA SRQ (follows FLG)
29-Mar-03 RMS Added support for console backpressure
25-Apr-03 RMS Added extended file support
22-Dec-02 RMS Added break support
01-Nov-02 RMS Revised BOOT command for IBL ROMs
Fixed bug in TTY reset, TTY starts in input mode
Fixed bug in TTY mode OTA, stores data as well
Fixed clock to add calibration, proper start/stop
Added UC option to TTY output
30-May-02 RMS Widened POS to 32b
22-Mar-02 RMS Revised for dynamically allocated memory
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
References:
- 2748B Tape Reader Operating and Service Manual (02748-90041, Oct-1977)
- 12597A 8-Bit Duplex Register Interface Kit Operating and Service Manual
(12597-9002, Sep-1974)
- 12531C Buffered Teleprinter Interface Kit Operating and Service Manual
(12531-90033, Nov-1972)
- 12539C Time Base Generator Interface Kit Operating and Service Manual
(12539-90008, Jan-1975)
The reader and punch, like most HP devices, have a command flop. The
teleprinter and clock do not.
Reader diagnostic mode simulates a tape loop by rewinding the tape image file
upon EOF. Normal mode EOF action is to supply TRLLIM nulls and then either
return SCPE_IOERR or SCPE_OK without setting the device flag.
To support CPU idling, the teleprinter interface (which doubles as the
simulator console) polls for input using a calibrated timer with a ten
millisecond period. Other polled-keyboard input devices (multiplexers and
the BACI card) synchronize with the console poll to ensure maximum available
idle time. The console poll is guaranteed to run, as the TTY device cannot
be disabled.
The clock (time base generator) autocalibrates. If the CLK is set to a ten
millisecond period (e.g., as under RTE), it is synchronized to the console
poll. Otherwise (e.g., as under DOS or TSB, which use 100 millisecond
periods), it runs asynchronously. If the specified clock frequency is below
10Hz, the clock service routine runs at 10Hz and counts down a repeat counter
before generating an interrupt. Autocalibration will not work if the clock
is running at 1Hz or less.
Clock diagnostic mode corresponds to inserting jumper W2 on the 12539C.
This turns off autocalibration and divides the longest time intervals down
by 10**3. The clk_time values were chosen to allow the diagnostic to
pass its clock calibration test.
*/
#include "hp2100_defs.h"
#define TTY_OUT_WAIT 200 /* TTY output wait */
#define UNIT_V_DIAG (TTUF_V_UF + 0) /* diag mode */
#define UNIT_V_AUTOLF (TTUF_V_UF + 1) /* auto linefeed */
#define UNIT_DIAG (1 << UNIT_V_DIAG)
#define UNIT_AUTOLF (1 << UNIT_V_AUTOLF)
#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)
FLIP_FLOP ptr_control = CLEAR;
FLIP_FLOP ptr_flag = CLEAR;
FLIP_FLOP ptr_flagbuf = CLEAR;
int32 ptr_stopioe = 0; /* stop on error */
int32 ptr_trlcnt = 0; /* trailer counter */
int32 ptr_trllim = 40; /* trailer to add */
FLIP_FLOP ptp_control = CLEAR;
FLIP_FLOP ptp_flag = CLEAR;
FLIP_FLOP ptp_flagbuf = CLEAR;
int32 ptp_stopioe = 0;
FLIP_FLOP tty_control = CLEAR;
FLIP_FLOP tty_flag = CLEAR;
FLIP_FLOP tty_flagbuf = CLEAR;
int32 ttp_stopioe = 0;
int32 tty_buf = 0; /* tty buffer */
int32 tty_mode = 0; /* tty mode */
int32 tty_shin = 0377; /* tty shift in */
int32 tty_lf = 0; /* lf flag */
FLIP_FLOP clk_control = CLEAR;
FLIP_FLOP clk_flag = CLEAR;
FLIP_FLOP clk_flagbuf = CLEAR;
int32 clk_select = 0; /* clock time select */
int32 clk_error = 0; /* clock error */
int32 clk_ctr = 0; /* clock counter */
int32 clk_time[8] = { /* clock intervals */
155, 1550, 15500, 155000, 155000, 155000, 155000, 155000
};
int32 clk_tps[8] = { /* clock tps */
10000, 1000, 100, 10, 10, 10, 10, 10
};
int32 clk_rpt[8] = { /* number of repeats */
1, 1, 1, 1, 10, 100, 1000, 10000
};
uint32 clk_tick = 0; /* instructions per tick */
DEVICE ptr_dev, ptp_dev, tty_dev, clk_dev;
uint32 ptrio (uint32 select_code, IOSIG signal, uint32 data);
t_stat ptr_svc (UNIT *uptr);
t_stat ptr_attach (UNIT *uptr, char *cptr);
t_stat ptr_reset (DEVICE *dptr);
t_stat ptr_boot (int32 unitno, DEVICE *dptr);
uint32 ptpio (uint32 select_code, IOSIG signal, uint32 data);
t_stat ptp_svc (UNIT *uptr);
t_stat ptp_reset (DEVICE *dptr);
uint32 ttyio (uint32 select_code, IOSIG signal, uint32 data);
t_stat tti_svc (UNIT *uptr);
t_stat tto_svc (UNIT *uptr);
t_stat tty_reset (DEVICE *dptr);
t_stat tty_set_opt (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat tty_set_alf (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat tto_out (int32 c);
t_stat ttp_out (int32 c);
uint32 clkio (uint32 select_code, IOSIG signal, uint32 data);
t_stat clk_svc (UNIT *uptr);
t_stat clk_reset (DEVICE *dptr);
int32 clk_delay (int32 flg);
/* 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, &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 (CTL, ptr_control, 0) },
{ FLDATA (FLG, ptr_flag, 0) },
{ FLDATA (FBF, ptr_flagbuf, 0) },
{ DRDATA (TRLCTR, ptr_trlcnt, 8), REG_HRO },
{ DRDATA (TRLLIM, ptr_trllim, 8), PV_LEFT },
{ DRDATA (POS, ptr_unit.pos, T_ADDR_W), PV_LEFT },
{ DRDATA (TIME, ptr_unit.wait, 24), PV_LEFT },
{ FLDATA (STOP_IOE, ptr_stopioe, 0) },
{ ORDATA (DEVNO, ptr_dib.devno, 6), REG_HRO },
{ NULL }
};
MTAB ptr_mod[] = {
{ UNIT_DIAG, UNIT_DIAG, "diagnostic mode", "DIAG", NULL },
{ UNIT_DIAG, 0, "reader mode", "READER", NULL },
{ MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, &ptr_dev },
{ 0 }
};
DEVICE ptr_dev = {
"PTR", &ptr_unit, ptr_reg, ptr_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &ptr_reset,
&ptr_boot, &ptr_attach, NULL,
&ptr_dib, DEV_DISABLE
};
/* 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, &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 (CTL, ptp_control, 0) },
{ FLDATA (FLG, ptp_flag, 0) },
{ FLDATA (FBF, ptp_flagbuf, 0) },
{ DRDATA (POS, ptp_unit.pos, T_ADDR_W), PV_LEFT },
{ DRDATA (TIME, ptp_unit.wait, 24), PV_LEFT },
{ FLDATA (STOP_IOE, ptp_stopioe, 0) },
{ ORDATA (DEVNO, ptp_dib.devno, 6), REG_HRO },
{ NULL }
};
MTAB ptp_mod[] = {
{ MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, &ptp_dev },
{ 0 }
};
DEVICE ptp_dev = {
"PTP", &ptp_unit, ptp_reg, ptp_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &ptp_reset,
NULL, NULL, NULL,
&ptp_dib, DEV_DISABLE
};
/* 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
DIB tty_dib = { TTY, &ttyio };
UNIT tty_unit[] = {
{ UDATA (&tti_svc, UNIT_IDLE | TT_MODE_UC, 0), POLL_WAIT },
{ UDATA (&tto_svc, TT_MODE_UC, 0), TTY_OUT_WAIT },
{ UDATA (&tto_svc, UNIT_SEQ | UNIT_ATTABLE | TT_MODE_8B, 0), SERIAL_OUT_WAIT }
};
REG tty_reg[] = {
{ ORDATA (BUF, tty_buf, 8) },
{ ORDATA (MODE, tty_mode, 16) },
{ ORDATA (SHIN, tty_shin, 8), REG_HRO },
{ FLDATA (CTL, tty_control, 0) },
{ FLDATA (FLG, tty_flag, 0) },
{ FLDATA (FBF, tty_flagbuf, 0) },
{ FLDATA (KLFP, tty_lf, 0), REG_HRO },
{ DRDATA (KPOS, tty_unit[TTI].pos, T_ADDR_W), PV_LEFT },
{ DRDATA (KTIME, tty_unit[TTI].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 },
{ DRDATA (PPOS, tty_unit[TTP].pos, T_ADDR_W), PV_LEFT },
{ FLDATA (STOP_IOE, ttp_stopioe, 0) },
{ ORDATA (DEVNO, tty_dib.devno, 6), REG_HRO },
{ NULL }
};
MTAB tty_mod[] = {
{ TT_MODE, TT_MODE_UC, "UC", "UC", &tty_set_opt },
{ TT_MODE, TT_MODE_7B, "7b", "7B", &tty_set_opt },
{ TT_MODE, TT_MODE_8B, "8b", "8B", &tty_set_opt },
{ TT_MODE, TT_MODE_7P, "7p", "7P", &tty_set_opt },
{ UNIT_AUTOLF, UNIT_AUTOLF, "autolf", "AUTOLF", &tty_set_alf },
{ UNIT_AUTOLF, 0 , NULL, "NOAUTOLF", &tty_set_alf },
{ MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, &tty_dev },
{ 0 }
};
DEVICE tty_dev = {
"TTY", tty_unit, tty_reg, tty_mod,
3, 10, 31, 1, 8, 8,
NULL, NULL, &tty_reset,
NULL, NULL, NULL,
&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, &clkio };
UNIT clk_unit = { UDATA (&clk_svc, UNIT_IDLE, 0) };
REG clk_reg[] = {
{ ORDATA (SEL, clk_select, 3) },
{ DRDATA (CTR, clk_ctr, 14) },
{ FLDATA (CTL, clk_control, 0) },
{ FLDATA (FLG, clk_flag, 0) },
{ FLDATA (FBF, clk_flagbuf, 0) },
{ FLDATA (ERR, clk_error, CLK_V_ERROR) },
{ BRDATA (TIME, clk_time, 10, 24, 8) },
{ DRDATA (IPTICK, clk_tick, 24), PV_RSPC | REG_RO },
{ ORDATA (DEVNO, clk_dib.devno, 6), REG_HRO },
{ NULL }
};
MTAB clk_mod[] = {
{ UNIT_DIAG, UNIT_DIAG, "diagnostic mode", "DIAG", NULL },
{ UNIT_DIAG, 0, "calibrated", "CALIBRATED", NULL },
{ MTAB_XTD | MTAB_VDV, 0, "DEVNO", "DEVNO",
&hp_setdev, &hp_showdev, &clk_dev },
{ 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, DEV_DISABLE
};
/* Paper tape reader I/O signal handler.
Implementation notes:
1. The 12597A duplex register card is used to interface the paper tape
reader to the computer. This card has a device command flip-flop, which
supplies the READ signal to the tape reader. Under simulation, this
state is implied by the activation of the PTR unit.
2. The POPIO signal clears the output buffer of the duplex card. However,
the buffer outputs are not used by the paper tape reader. Under
simulation, we omit the buffer clear.
*/
uint32 ptrio (uint32 select_code, IOSIG signal, uint32 data)
{
const IOSIG base_signal = IOBASE (signal); /* derive base signal */
switch (base_signal) { /* dispatch base I/O signal */
case ioCLF: /* clear flag flip-flop */
ptr_flag = ptr_flagbuf = CLEAR;
break;
case ioSTF: /* set flag flip-flop */
case ioENF: /* enable flag */
ptr_flag = ptr_flagbuf = SET;
break;
case ioSFC: /* skip if flag is clear */
setstdSKF (ptr);
break;
case ioSFS: /* skip if flag is set */
setstdSKF (ptr);
break;
case ioIOI: /* I/O data input */
data = ptr_unit.buf;
break;
case ioPOPIO: /* power-on preset to I/O */
ptr_flag = ptr_flagbuf = SET; /* set flag and flag buffer */
/* fall into CRS handler */
case ioCRS: /* control reset */
/* fall into CLC handler */
case ioCLC: /* clear control flip-flop */
ptr_control = CLEAR;
break;
case ioSTC: /* set control flip-flop */
ptr_control = SET;
sim_activate (&ptr_unit, ptr_unit.wait);
break;
case ioSIR: /* set interrupt request */
setstdPRL (select_code, ptr); /* set standard PRL signal */
setstdIRQ (select_code, ptr); /* set standard IRQ signal */
setstdSRQ (select_code, ptr); /* set standard SRQ signal */
break;
case ioIAK: /* interrupt acknowledge */
ptr_flagbuf = CLEAR;
break;
default: /* all other signals */
break; /* are ignored */
}
if (signal > ioCLF) /* multiple signals? */
ptrio (select_code, ioCLF, 0); /* issue CLF */
else if (signal > ioSIR) /* signal affected interrupt status? */
ptrio (select_code, ioSIR, 0); /* set interrupt request */
return data;
}
/* Unit service */
t_stat ptr_svc (UNIT *uptr)
{
int32 temp;
if ((ptr_unit.flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (ptr_stopioe, SCPE_UNATT);
while ((temp = getc (ptr_unit.fileref)) == EOF) { /* read byte, error? */
if (feof (ptr_unit.fileref)) { /* end of file? */
if ((ptr_unit.flags & UNIT_DIAG) && (ptr_unit.pos > 0)) {
rewind (ptr_unit.fileref); /* rewind if loop mode */
ptr_unit.pos = 0;
}
else {
if (ptr_trlcnt >= ptr_trllim) { /* added all trailer? */
if (ptr_stopioe) { /* stop on error? */
printf ("PTR end of file\n");
return SCPE_IOERR;
}
else return SCPE_OK; /* no, just hang */
}
ptr_trlcnt++; /* count trailer */
temp = 0; /* read a zero */
break;
}
}
else { /* no, real error */
perror ("PTR I/O error");
clearerr (ptr_unit.fileref);
return SCPE_IOERR;
}
}
ptrio (ptr_dib.devno, ioENF, 0); /* set flag */
ptr_unit.buf = temp & 0377; /* put byte in buf */
ptr_unit.pos = ftell (ptr_unit.fileref);
if (temp) /* character non-null? */
ptr_trlcnt = 0; /* clear trailing null counter */
return SCPE_OK;
}
/* Attach routine - clear the trailer counter */
t_stat ptr_attach (UNIT *uptr, char *cptr)
{
ptr_trlcnt = 0;
return attach_unit (uptr, cptr);
}
/* Reset routine - called from SCP */
t_stat ptr_reset (DEVICE *dptr)
{
ptrio (ptr_dib.devno, ioPOPIO, 0); /* send POPIO signal */
sim_cancel (&ptr_unit); /* deactivate unit */
return SCPE_OK;
}
/* Paper tape reader bootstrap routine (HP 12992K ROM) */
const BOOT_ROM ptr_rom = {
0107700, /*ST CLC 0,C ; intr off */
0002401, /* CLA,RSS ; skip in */
0063756, /*CN LDA M11 ; feed frame */
0006700, /* CLB,CCE ; set E to rd byte */
0017742, /* JSB READ ; get #char */
0007306, /* CMB,CCE,INB,SZB ; 2's comp */
0027713, /* JMP *+5 ; non-zero byte */
0002006, /* INA,SZA ; feed frame ctr */
0027703, /* JMP *-3 */
0102077, /* HLT 77B ; stop */
0027700, /* JMP ST ; next */
0077754, /* STA WC ; word in rec */
0017742, /* JSB READ ; get feed frame */
0017742, /* JSB READ ; get address */
0074000, /* STB 0 ; init csum */
0077755, /* STB AD ; save addr */
0067755, /*CK LDB AD ; check addr */
0047777, /* ADB MAXAD ; below loader */
0002040, /* SEZ ; E =0 => OK */
0027740, /* JMP H55 */
0017742, /* JSB READ ; get word */
0040001, /* ADA 1 ; cont checksum */
0177755, /* STA AD,I ; store word */
0037755, /* ISZ AD */
0000040, /* CLE ; force wd read */
0037754, /* ISZ WC ; block done? */
0027720, /* JMP CK ; no */
0017742, /* JSB READ ; get checksum */
0054000, /* CPB 0 ; ok? */
0027702, /* JMP CN ; next block */
0102011, /* HLT 11 ; bad csum */
0027700, /* JMP ST ; next */
0102055, /*H55 HALT 55 ; bad address */
0027700, /* JMP ST ; next */
0000000, /*RD 0 */
0006600, /* CLB,CME ; E reg byte ptr */
0103710, /* STC RDR,C ; start reader */
0102310, /* SFS RDR ; wait */
0027745, /* JMP *-1 */
0106410, /* MIB RDR ; get byte */
0002041, /* SEZ,RSS ; E set? */
0127742, /* JMP RD,I ; no, done */
0005767, /* BLF,CLE,BLF ; shift byte */
0027744, /* JMP RD+2 ; again */
0000000, /*WC 000000 ; word count */
0000000, /*AD 000000 ; address */
0177765, /*M11 -11 ; feed count */
0, 0, 0, 0, 0, 0, 0, 0, /* unused */
0, 0, 0, 0, 0, 0, 0, /* unused */
0000000 /*MAXAD -ST ; max addr */
};
t_stat ptr_boot (int32 unitno, DEVICE *dptr)
{
int32 dev;
dev = ptr_dib.devno; /* get device no */
if (ibl_copy (ptr_rom, dev)) return SCPE_IERR; /* copy boot to memory */
SR = (SR & IBL_OPT) | IBL_PTR | (dev << IBL_V_DEV); /* set SR */
return SCPE_OK;
}
/* Paper tape punch I/O signal handler.
Implementation notes:
1. The 12597A duplex register card is used to interface the paper tape
punch to the computer. This card has a device command flip-flop, which
supplies the PUNCH signal to the tape reader. Under simulation, this
state is implied by the activation of the PTP unit.
*/
uint32 ptpio (uint32 select_code, IOSIG signal, uint32 data)
{
const IOSIG base_signal = IOBASE (signal); /* derive base signal */
switch (base_signal) { /* dispatch base I/O signal */
case ioCLF: /* clear flag flip-flop */
ptp_flag = ptp_flagbuf = CLEAR;
break;
case ioSTF: /* set flag flip-flop */
case ioENF: /* enable flag */
ptp_flag = ptp_flagbuf = SET;
break;
case ioSFC: /* skip if flag is clear */
setstdSKF (ptp);
break;
case ioSFS: /* skip if flag is set */
setstdSKF (ptp);
break;
case ioIOI: /* I/O data input */
if ((ptp_unit.flags & UNIT_ATT) == 0) /* not attached? */
data = PTP_LOW; /* report as out of tape */
else
data = 0;
break;
case ioIOO: /* I/O data output */
ptp_unit.buf = data;
break;
case ioPOPIO: /* power-on preset to I/O */
ptp_flag = ptp_flagbuf = SET; /* set flag and flag buffer */
ptp_unit.buf = 0; /* clear output buffer */
/* fall into CRS handler */
case ioCRS: /* control reset */
/* fall into CLC handler */
case ioCLC: /* clear control flip-flop */
ptp_control = CLEAR;
break;
case ioSTC: /* set control flip-flop */
ptp_control = SET;
sim_activate (&ptp_unit, ptp_unit.wait);
break;
case ioSIR: /* set interrupt request */
setstdPRL (select_code, ptp); /* set standard PRL signal */
setstdIRQ (select_code, ptp); /* set standard IRQ signal */
setstdSRQ (select_code, ptp); /* set standard SRQ signal */
break;
case ioIAK: /* interrupt acknowledge */
ptp_flagbuf = CLEAR;
break;
default: /* all other signals */
break; /* are ignored */
}
if (signal > ioCLF) /* multiple signals? */
ptpio (select_code, ioCLF, 0); /* issue CLF */
else if (signal > ioSIR) /* signal affected interrupt status? */
ptpio (select_code, ioSIR, 0); /* set interrupt request */
return data;
}
/* Unit service */
t_stat ptp_svc (UNIT *uptr)
{
ptpio (ptp_dib.devno, ioENF, 0); /* 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)
{
ptpio (ptp_dib.devno, ioPOPIO, 0); /* send POPIO signal */
sim_cancel (&ptp_unit); /* deactivate unit */
return SCPE_OK;
}
/* Terminal I/O signal handler */
uint32 ttyio (uint32 select_code, IOSIG signal, uint32 data)
{
const IOSIG base_signal = IOBASE (signal); /* derive base signal */
switch (base_signal) { /* dispatch base I/O signal */
case ioCLF: /* clear flag flip-flop */
tty_flag = tty_flagbuf = CLEAR;
break;
case ioSTF: /* set flag flip-flop */
case ioENF: /* enable flag */
tty_flag = tty_flagbuf = SET;
break;
case ioSFC: /* skip if flag is clear */
setstdSKF (tty);
break;
case ioSFS: /* skip if flag is set */
setstdSKF (tty);
break;
case ioIOI: /* I/O data input */
data = tty_buf;
if (!(tty_mode & TM_KBD) && sim_is_active (&tty_unit[TTO]))
data = data | TP_BUSY;
break;
case ioIOO: /* I/O data output */
if (data & TM_MODE)
tty_mode = data & (TM_KBD|TM_PRI|TM_PUN);
tty_buf = data & 0377;
break;
case ioPOPIO: /* power-on preset to I/O */
/* fall into CRS handler */
case ioCRS: /* control reset */
tty_control = CLEAR; /* clear control */
tty_flag = tty_flagbuf = SET; /* set flag and flag buffer */
tty_mode = TM_KBD; /* set tty, clear print/punch */
tty_shin = 0377; /* input inactive */
tty_lf = 0; /* no lf pending */
break;
case ioCLC: /* clear control flip-flop */
tty_control = CLEAR;
break;
case ioSTC: /* set control flip-flop */
tty_control = SET;
if (!(tty_mode & TM_KBD)) /* output? */
sim_activate (&tty_unit[TTO], tty_unit[TTO].wait);
break;
case ioSIR: /* set interrupt request */
setstdPRL (select_code, tty); /* set standard PRL signal */
setstdIRQ (select_code, tty); /* set standard IRQ signal */
setstdSRQ (select_code, tty); /* set standard SRQ signal */
break;
case ioIAK: /* interrupt acknowledge */
tty_flagbuf = CLEAR;
break;
default: /* all other signals */
break; /* are ignored */
}
if (signal > ioCLF) /* multiple signals? */
ttyio (select_code, ioCLF, 0); /* issue CLF */
else if (signal > ioSIR) /* signal affected interrupt status? */
ttyio (select_code, ioSIR, 0); /* set interrupt request */
return data;
}
/* TTY input service routine.
The console input poll routine is scheduled with a ten millisecond period
using a calibrated timer, which is the source of event timing for all of the
keyboard polling routines. Synchronizing other keyboard polls with the
console poll ensures maximum idle time.
Several HP operating systems require a CR and LF sequence for line
termination. This is awkward on a PC, as there is no LF key (CTRL+J is
needed instead). We provide an AUTOLF mode to add a LF automatically to each
CR input. When this mode is set, entering CR will set a flag, which will
cause a LF to be supplied automatically at the next input poll.
The 12531C teleprinter interface and the later 12880A CRT interface provide a
clever mechanism to detect a keypress during output. This is used by DOS and
RTE to allow the user to interrupt lengthy output operations to enter system
commands.
Referring to the 12531C schematic, the terminal input enters on pin X
("DATA FROM EIA COMPATIBLE DEVICE"). The signal passes through four
transistor inversions (Q8, Q1, Q2, and Q3) to appear on pin 12 of NAND gate
U104C. If the flag flip-flop is not set, the terminal input passes to the
(inverted) output of U104C and thence to the D input of the first of the
flip-flops forming the data register.
In the idle condition (no key pressed), the terminal input line is marking
(voltage negative), so in passing through a total of five inversions, a
logic one is presented at the serial input of the data register. During an
output operation, the register is parallel loaded and serially shifted,
sending the output data through the register to the device and -- this is
the crux -- filling the register with logic ones from U104C.
At the end of the output operation, the card flag is set, an interrupt
occurs, and the RTE driver is entered. The driver then does an LIA SC to
read the contents of the data register. If no key has been pressed during
the output operation, the register will read as all ones (octal 377). If,
however, any key was struck, at least one zero bit will be present. If the
register value doesn't equal 377, the driver sets the system "operator
attention" flag, which will cause DOS or RTE to output an asterisk prompt and
initiate a terminal read when the current output line is completed.
*/
t_stat tti_svc (UNIT *uptr)
{
int32 c;
uptr->wait = sim_rtcn_calb (POLL_RATE, TMR_POLL); /* calibrate poll timer */
sim_activate (uptr, uptr->wait); /* continue poll */
tty_shin = 0377; /* assume inactive */
if (tty_lf) { /* auto lf pending? */
c = 012; /* force lf */
tty_lf = 0;
}
else {
if ((c = sim_poll_kbd ()) < SCPE_KFLAG) return c; /* no char or error? */
if (c & SCPE_BREAK) c = 0; /* break? */
else c = sim_tt_inpcvt (c, TT_GET_MODE (uptr->flags));
tty_lf = ((c & 0177) == 015) && (uptr->flags & UNIT_AUTOLF);
}
if (tty_mode & TM_KBD) { /* keyboard enabled? */
tty_buf = c; /* put char in buf */
uptr->pos = uptr->pos + 1;
ttyio (tty_dib.devno, ioENF, 0); /* set flag */
if (c) {
tto_out (c); /* echo? */
return ttp_out (c); /* punch? */
}
}
else tty_shin = c; /* no, char shifts in */
return SCPE_OK;
}
/* TTY output service routine */
t_stat tto_svc (UNIT *uptr)
{
int32 c;
t_stat r;
c = tty_buf; /* get char */
tty_buf = tty_shin; /* shift in */
tty_shin = 0377; /* line inactive */
if ((r = tto_out (c)) != SCPE_OK) { /* output; error? */
sim_activate (uptr, uptr->wait); /* retry */
return ((r == SCPE_STALL)? SCPE_OK: r); /* !stall? report */
}
ttyio (tty_dib.devno, ioENF, 0); /* set flag */
return ttp_out (c); /* punch if enabled */
}
t_stat tto_out (int32 c)
{
t_stat r;
if (tty_mode & TM_PRI) { /* printing? */
c = sim_tt_outcvt (c, TT_GET_MODE (tty_unit[TTO].flags));
if (c >= 0) { /* valid? */
if (r = sim_putchar_s (c)) return r; /* output char */
tty_unit[TTO].pos = tty_unit[TTO].pos + 1;
}
}
return SCPE_OK;
}
t_stat ttp_out (int32 c)
{
if (tty_mode & TM_PUN) { /* punching? */
if ((tty_unit[TTP].flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (ttp_stopioe, SCPE_UNATT);
if (putc (c, 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 SCPE_OK;
}
/* TTY reset routine */
t_stat tty_reset (DEVICE *dptr)
{
if (sim_switches & SWMASK ('P')) /* PON reset? */
tty_buf = 0; /* clear buffer */
ttyio (tty_dib.devno, ioPOPIO, 0); /* send POPIO signal */
tty_unit[TTI].wait = POLL_WAIT; /* reset initial poll */
sim_rtcn_init (tty_unit[TTI].wait, TMR_POLL); /* init poll timer */
sim_activate (&tty_unit[TTI], tty_unit[TTI].wait); /* activate poll */
sim_cancel (&tty_unit[TTO]); /* cancel output */
return SCPE_OK;
}
t_stat tty_set_opt (UNIT *uptr, int32 val, char *cptr, void *desc)
{
int32 u = uptr - tty_dev.units;
if (u > TTO) return SCPE_NOFNC;
if ((u == TTI) && (val == TT_MODE_7P))
val = TT_MODE_7B;
tty_unit[u].flags = (tty_unit[u].flags & ~TT_MODE) | val;
return SCPE_OK;
}
t_stat tty_set_alf (UNIT *uptr, int32 val, char *cptr, void *desc)
{
int32 u = uptr - tty_dev.units;
if (u != TTI) return SCPE_NOFNC;
return SCPE_OK;
}
/* Synchronize polling.
Return an event time corresponding either with the amount of time remaining
in the current poll (mode = INITIAL) or the amount of time in a full poll
period (mode = SERVICE). If the former call is made when the device service
routine is started, then making the latter call during unit service will
ensure that the polls remain synchronized.
*/
int32 sync_poll (POLLMODE poll_mode)
{
int32 poll_time;
if (poll_mode == INITIAL) {
poll_time = sim_is_active (&tty_unit[TTI]);
if (poll_time)
return poll_time;
else
return POLL_WAIT;
}
else
return tty_unit[TTI].wait;
}
/* Clock I/O signal handler.
The time base generator (CLK) provides periodic interrupts from 100
microseconds to 1000 seconds. The CLK uses a calibrated timer to provide the
time base. For periods ranging from 1 to 1000 seconds, a 100 millisecond
timer is used, and 10 to 10000 ticks are counted before setting the device
flag to indicate that the period has expired.
If the period is set to ten milliseconds, the console poll timer is used
instead of an independent timer. This is to maximize the idle period.
In diagnostic mode, the clock period is set to the expected number of CPU
instructions, rather than wall-clock time, so that the diagnostic executes as
expected.
*/
uint32 clkio (uint32 select_code, IOSIG signal, uint32 data)
{
const IOSIG base_signal = IOBASE (signal); /* derive base signal */
switch (base_signal) { /* dispatch base I/O signal */
case ioCLF: /* clear flag flip-flop */
clk_flag = clk_flagbuf = CLEAR;
break;
case ioSTF: /* set flag flip-flop */
case ioENF: /* enable flag */
clk_flag = clk_flagbuf = SET;
break;
case ioSFC: /* skip if flag is clear */
setstdSKF (clk);
break;
case ioSFS: /* skip if flag is set */
setstdSKF (clk);
break;
case ioIOI: /* I/O data input */
data = clk_error;
break;
case ioIOO: /* I/O data output */
clk_select = data & 07; /* save select */
sim_cancel (&clk_unit); /* stop the clock */
clk_control = CLEAR; /* clear control */
clkio (select_code, ioSIR, 0); /* set interrupt request (IOO normally doesn't) */
break;
case ioPOPIO: /* power-on preset to I/O */
clk_flag = clk_flagbuf = SET; /* set flag and flag buffer */
/* fall into CRS handler */
case ioCRS: /* control reset */
/* fall into CLC handler */
case ioCLC: /* clear control flip-flop */
clk_control = CLEAR;
sim_cancel (&clk_unit); /* deactivate unit */
break;
case ioSTC: /* set control flip-flop */
clk_control = SET;
if (clk_unit.flags & UNIT_DIAG) /* diag mode? */
clk_unit.flags = clk_unit.flags & ~UNIT_IDLE; /* not calibrated */
else
clk_unit.flags = clk_unit.flags | UNIT_IDLE; /* is calibrated */
if (!sim_is_active (&clk_unit)) { /* clock running? */
clk_tick = clk_delay (0); /* get tick count */
if ((clk_unit.flags & UNIT_DIAG) == 0) /* calibrated? */
if (clk_select == 2) /* 10 msec. interval? */
clk_tick = sync_poll (INITIAL); /* sync poll */
else
sim_rtcn_init (clk_tick, TMR_CLK); /* initialize timer */
sim_activate (&clk_unit, clk_tick); /* start clock */
clk_ctr = clk_delay (1); /* set repeat ctr */
}
clk_error = 0; /* clear error */
break;
case ioSIR: /* set interrupt request */
setstdPRL (select_code, clk); /* set standard PRL signal */
setstdIRQ (select_code, clk); /* set standard IRQ signal */
setstdSRQ (select_code, clk); /* set standard SRQ signal */
break;
case ioIAK: /* interrupt acknowledge */
clk_flagbuf = CLEAR;
break;
default: /* all other signals */
break; /* are ignored */
}
if (signal > ioCLF) /* multiple signals? */
clkio (select_code, ioCLF, 0); /* issue CLF */
else if (signal > ioSIR) /* signal affected interrupt status? */
clkio (select_code, ioSIR, 0); /* set interrupt request */
return data;
}
/* CLK unit service.
As with the I/O handler, if the time base period is set to ten milliseconds,
the console poll timer is used instead of an independent timer.
*/
t_stat clk_svc (UNIT *uptr)
{
if (!clk_control) /* control clear? */
return SCPE_OK; /* done */
if (clk_unit.flags & UNIT_DIAG) /* diag mode? */
clk_tick = clk_delay (0); /* get fixed delay */
else if (clk_select == 2) /* 10 msec period? */
clk_tick = sync_poll (SERVICE); /* sync poll */
else
clk_tick = sim_rtcn_calb (clk_tps[clk_select], TMR_CLK); /* calibrate delay */
sim_activate (uptr, clk_tick); /* reactivate */
clk_ctr = clk_ctr - 1; /* decrement counter */
if (clk_ctr <= 0) { /* end of interval? */
if (clk_flag)
clk_error = CLK_ERROR; /* overrun? error */
else
clkio (clk_dib.devno, ioENF, 0); /* set flag */
clk_ctr = clk_delay (1); /* reset counter */
}
return SCPE_OK;
}
/* Reset routine */
t_stat clk_reset (DEVICE *dptr)
{
if (sim_switches & SWMASK ('P')) { /* PON reset? */
clk_error = 0; /* clear error */
clk_select = 0; /* clear select */
clk_ctr = 0; /* clear counter */
}
clkio (clk_dib.devno, ioPOPIO, 0); /* send POPIO signal */
return SCPE_OK;
}
/* Clock delay routine */
int32 clk_delay (int32 flg)
{
int32 sel = clk_select;
if ((clk_unit.flags & UNIT_DIAG) && (sel >= 4)) sel = sel - 3;
if (flg) return clk_rpt[sel];
else return clk_time[sel];
}