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/* i7090_com.c: IBM 7094 7750 communications interface simulator
Derived from Bob Supnik's i7094_com.c
Copyright (c) 2005-2009, Robert M Supnik
Copyright (c) 2010-2016, Richard Cornwell
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
RICHARD CORNWELL 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 Supnik or Richard Cornwell
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 Supnik
or Richard Cornwell
com 7750 controller
coml 7750 lines
This module implements an abstract simulator for the IBM 7750 communications
computer as used by the CTSS system. The 7750 supports up to 112 lines;
the simulator supports 33. The 7750 can handle both high-speed lines, in
6b and 12b mode, and normal terminals, in 12b mode only; the simulator
supports only terminals. The 7750 can handle many different kinds of
terminals; the simulator supports only a limited subset.
Input is asynchronous. The 7750 sets ATN1 to signal availability of input.
When the 7094 issues a CTLRN, the 7750 gathers available input characters
into a message. The message has a 12b sequence number, followed by 12b line
number/character pairs, followed by end-of-medium (03777). Input characters
can either be control characters (bit 02000 set) or data characters. Data
characters are 1's complemented and are 8b wide: 7 data bits and 1 parity
bit (which may be 0).
Output is synchronous. When the 7094 issues a CTLWN, the 7750 interprets
the channel output as a message. The message has a 12b line number, followed
by a 12b character count, followed by characters, followed by end-of-medium.
If bit 02000 of the line number is set, the characters are 12b wide. If
bit 01000 is set, the message is a control message. 12b characters consist
of 7 data bits, 1 parity bit, and 1 start bit. Data characters are 1's
complemented. Data character 03777 is special and causes the 7750 to
repeat the previous bit for the number of bit times specified in the next
character. This is used to generate delays for positioning characters.
The 7750 supports flow control for output. To help the 7094 account for
usage of 7750 buffer memory, the 7750 sends 'character output completion'
messages for every 'n' characters output on a line, where n <= 31.
Note that the simulator console is mapped in as line n+1.
Sense word based on 7074 Principles of Operation.
1 A Reserved.
3 4 Program Check Summary byte
4 2 Exceptional Condtion Summary byte
5 1 Data Check Summary byte
7 A Reserved
9 4 Message Length Check Program Check
10 2 Channel Hold Program Check
11 1 Channel Queue Full Program Check
13 A Reserved
15 4 Reserved
16 2 Reserved
17 1 Interface Timeout Data Check
19 A Reserved
21 4 Data Message Ready Exceptional Condition
22 2 Input space available Exceptional Condition
23 1 Service Message Ready Exceptional Condition
*/
#include "i7000_defs.h"
#include "sim_timer.h"
#include "sim_sock.h"
#include "sim_tmxr.h"
#include <ctype.h>
#ifdef NUM_DEVS_COM
#define COM_MLINES 32 /* mux lines */
#define COM_TLINES (COM_MLINES)
#define COM_BUFSIZ 120 /* max chan transfer */
#define COM_PKTSIZ 16384 /* character buffer */
#define UNIT_V_2741 (UNIT_V_UF + 0) /* 2741 - ni */
#define UNIT_V_K35 (UNIT_V_UF + 1) /* KSR-35 */
#define UNIT_2741 (1 << UNIT_V_2741)
#define UNIT_K35 (1 << UNIT_V_K35)
#define TMR_COM 2
#define CONN u3 /* line is connected */
#define NEEDID u4 /* need to send ID */
#define ECHO u5 /* echoing output */
#define COM_INIT_POLL 8000 /* polling interval */
#define COMC_WAIT 2 /* channel delay time */
#define COML_WAIT 500 /* char delay time */
#define COM_LBASE 4 /* start of lines */
/* Input threads */
#define COM_PLU 0 /* multiplexor poll */
#define COM_CIU 1 /* console input */
#define COM_CHU 2 /* console output */
/* Communications input */
#define COMI_LCOMP 002000 /* line complete */
#define COMI_DIALUP 002001 /* dialup */
#define COMI_ENDID 002002 /* end ID */
#define COMI_INTR 002003 /* interrupt */
#define COMI_QUIT 002004 /* quit */
#define COMI_HANGUP 002005 /* hangup */
#define COMI_EOM 013777 /* end of medium */
#define COMI_COMP(x) ((uint16) (03000 + ((x) & COMI_CMAX)))
#define COMI_K35 6 /* KSR-35 ID */
#define COMI_K37 7 /* KSR-37 ID */
#define COMI_2741 8 /* 2741 ID */
#define COMI_CMAX 31 /* max chars returned */
#define COMI_PARITY 00200 /* parity bit */
#define COMI_BMAX 50 /* buffer max, words */
#define COMI_12BMAX ((3 * COMI_BMAX) - 1) /* last 12b char */
/* Communications output - characters */
#define COMO_LIN12B 02000 /* line is 12b */
#define COMO_LINCTL 01000 /* control msg */
#define COMO_GETLN(x) ((x) & 0777)
#define COMO_CTLRST 07777 /* control reset */
#define COMO_BITRPT 03777 /* bit repeat */
#define COMO_EOM12B 07777 /* end of medium */
#define COMO_EOM6B 077 /* end of medium */
#define COMO_BMAX 94 /* buffer max, words */
#define COMO_12BMAX ((3 * COMO_BMAX) - 1)
/* Report variables */
#define COMR_FQ 1 /* free queue */
#define COMR_IQ 2 /* input queue */
#define COMR_OQ 4 /* output queue */
/* Sense word flags */
#define EXPT_SRVRDY 0x1001 /* Service message available */
#define EXPT_INAVAIL 0x1002 /* Input available */
#define EXPT_DATRDY 0x1004 /* Data ready. */
#define DATA_TIMEOUT 0x2010 /* Timeout */
#define PROG_FULL 0x4100 /* No more space to send message */
#define PROG_HOLD 0x4200 /* Channel hold */
#define PROG_MSGLEN 0x4400 /* Invalid message length */
/* Input and output ring buffers */
uint16 in_buff[256];
int in_head;
int in_tail;
int in_count; /* Number of entries in queue */
int in_delay = 5000;
typedef struct
{
uint16 link;
uint16 data;
} OLIST;
uint32 com_posti = 0; /* Posted a IRQ */
uint32 com_active = 0; /* Channel active */
uint32 com_ocnt = 0; /* Number of characters to output */
uint32 com_oln = 0; /* Output line number */
uint32 com_o12b = 0; /* Outputing 12 bit */
uint32 com_enab = 0; /* 7750 enabled */
uint32 com_msgn = 0; /* next input msg num */
uint32 com_sta = 0; /* 7750 state */
uint32 com_quit = 3; /* quit code */
uint32 com_intr = 4; /* interrupt code */
uint32 com_tps = 50; /* polls/second */
uint8 com_out_inesc[COM_TLINES];
uint16 com_out_head[COM_TLINES];
uint16 com_out_tail[COM_TLINES];
uint16 com_comp_cnt[COM_TLINES];
int com_line; /* Current line */
uint16 com_free; /* free list */
OLIST com_buf[10240];
TMLN com_ldsc[COM_TLINES]; /* line descriptors */
TMXR com_desc = { COM_TLINES, 0, 0, com_ldsc }; /* mux descriptor */
uint32 com_sense = 0; /* Sense word */
uint16 com_data;
uint8 com_dflg = 0;
/* 2741 convertion table */
static const uint8 com_2741_out[256] = {
/* Upper case */
/* 0 1 2 3 4 5 6 7 */
' ', '-', '2', '+', '*', 'Q', 'Y', 'H', /* 000 */
':', 'M', 'U', 'D', '_', '_', '_', '_', /* 010 */
'@', 'K', 'S', 'B', ')', '_', '_', '_', /* 020 */
'\'', 'O', 'W', 'F','\n','\b', ' ', '_', /* 030 */
'=', 'J', '?', 'A', '(', 'R', 'Z', 'I', /* 040 */
'%', 'N', 'V', 'E', '_','\n','\r', '\t', /* 050 */
';', 'L', 'T', 'C', '#', '$', ',', '.', /* 060 */
'"', 'P', 'X', 'G', '_','\t', '<', '\0', /* 070 */
' ', '-', '@', '&', '8', 'q', 'y', 'h', /* 100 */
'4', 'm', 'u', 'd', '_', '_', '_', '_', /* 110 */
'2', 'k', 's', 'b', '0', '_', '_', '_', /* 120 */
'6', 'o', 'w', 'f', '_','\b', ' ', '_', /* 130 */
'1', 'j', '/', 'a', '9', 'r', 'z', 'i', /* 140 */
'5', 'n', 'v', 'e','\n','\n','\r', '\t', /* 150 */
'3', 'l', 't', 'c', '_', '!', ',', '.', /* 160 */
'7', 'p', 'x', 'g', '_','\t', '_','\0', /* 170 */
};
/* 76 43 177 15 */
/* 76 23 177 16 */
static const uint8 com_2741_in[128] = {
/* Control */
0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, /*0-37*/
/*Control*/
0135, 0057, 0155, 0000, 0000, 0155, 0000, 0000,
/*Control*/
0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
/*Control*/
0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
/* sp ! " # $ % & ' */
0100, 0365, 0070, 0264, 0165, 0150, 0303, 0130, /* 40 - 77 */
/* ( ) * + , - . / */
0144, 0124, 0004, 0203, 0166, 0001, 0067, 0342,
/* 0 1 2 3 4 5 6 7 */
0324, 0240, 0220, 0360, 0210, 0350, 0330, 0270,
/* 8 9 : ; < = > ? */
0204, 0344, 0010, 0160, 0000, 0040, 0000, 0142,
/* @ A B C D E F G */
0202, 0043, 0023, 0163, 0013, 0153, 0133, 0073, /* 100 - 137 */
/* H I J K L M N O */
0007, 0147, 0141, 0121, 0061, 0111, 0051, 0031,
/* P Q R S T U V W */
0171, 0105, 0045, 0122, 0062, 0112, 0052, 0032,
/* X Y Z [ \ ] ^ _ */
0172, 0106, 0046, 0000, 0000, 0000, 0000, 0000,
/* ` a b c d e f g */
0000, 0243, 0223, 0363, 0213, 0353, 0333, 0273, /* 140 - 177 */
/* h i j k l m n o */
0207, 0347, 0341, 0321, 0261, 0311, 0251, 0231,
/* p q r s t u v w */
0371, 0305, 0245, 0322, 0262, 0312, 0252, 0232,
/* x y z { | } ~ del*/
0372, 0306, 0246, 0000, 0000, 0000, 0000, 0177
};
uint32 com_cmd(UNIT * uptr, uint16 cmd, uint16 dev);
t_stat com_svc(UNIT * uptr);
t_stat comi_svc(UNIT * uptr);
t_stat como_svc(UNIT * uptr);
t_stat comti_svc(UNIT * uptr);
t_stat comto_svc(UNIT * uptr);
t_stat com_reset(DEVICE * dptr);
t_stat com_attach(UNIT * uptr, CONST char *cptr);
t_stat com_detach(UNIT * uptr);
t_stat com_summ(FILE * st, UNIT * uptr, int32 val, CONST void *desc);
t_stat com_show(FILE * st, UNIT * uptr, int32 val, CONST void *desc);
void com_reset_ln(uint32 i);
t_stat com_queue_in(uint32 ln, uint16 ch);
uint32 com_queue_out(uint32 ln, uint16 * c1);
t_stat com_send_id(uint32 ln);
t_stat com_send_ccmp(uint32 ln);
void com_skip_outc(uint32 ln);
t_bool com_get(int ln, uint16 *ch);
t_bool com_put(int ln, uint16 ch);
void com_post_eom();
t_bool com_inp_msg(uint32 ln, uint16 msg);
const char *com_description(DEVICE *dptr);
t_stat com_help(FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr);
const char *coml_description(DEVICE *dptr);
t_stat coml_help(FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr);
/* COM data structures
com_dev COM device descriptor
com_unit COM unit descriptor
com_reg COM register list
com_mod COM modifiers list
*/
#ifdef I7010
#define COM_CHAN 4
#else
#define COM_CHAN 5
#endif
UNIT com_unit[] = {
{UDATA(&comi_svc, UNIT_S_CHAN(COM_CHAN) | UNIT_ATTABLE, 0), COM_INIT_POLL},
{UDATA(&comti_svc, UNIT_S_CHAN(COM_CHAN) | UNIT_DIS, 0), KBD_POLL_WAIT},
{UDATA(&com_svc, UNIT_S_CHAN(COM_CHAN) | UNIT_DIS, 0), COMC_WAIT},
};
REG com_reg[] = {
{FLDATA(ENABLE, com_enab, 0)},
{ORDATA(STATE, com_sta, 6)},
{ORDATA(MSGNUM, com_msgn, 12)},
{NULL}
};
MTAB com_mod[] = {
{MTAB_XTD | MTAB_VUN | MTAB_VALR, 0, "CHAN", "CHAN",
&set_chan, &get_chan, NULL, "Set channel"},
#ifndef I7010
{MTAB_XTD | MTAB_VUN | MTAB_VALR, 0, "SELECT", "SELECT",
&chan9_set_select, &chan9_get_select, NULL, "Set selection channel"},
#endif
{UNIT_ATT, UNIT_ATT, "connections", NULL, NULL, &com_summ},
{MTAB_XTD | MTAB_VDV | MTAB_NMO, 1, "CONNECTIONS", NULL,
NULL, &com_show, NULL},
{MTAB_XTD | MTAB_VDV | MTAB_NMO, 0, "STATISTICS", NULL,
NULL, &com_show, NULL},
{0}
};
DEVICE com_dev = {
"COM", com_unit, com_reg, com_mod,
3, 10, 31, 1, 16, 8,
&tmxr_ex, &tmxr_dep, &com_reset,
NULL, &com_attach, &com_detach,
&com_dib, DEV_DISABLE| DEV_DEBUG|DEV_NET, 0, dev_debug,
NULL, NULL, &com_help, NULL, NULL, &com_description
};
/* COMLL data structures
coml_dev COML device descriptor
coml_unit COML unit descriptor
coml_reg COML register list
coml_mod COML modifiers list
*/
UNIT coml_unit[] = {
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 0 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 1 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 2 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 3 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 4 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 5 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 6 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 7 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 8 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 9 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 0 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 1 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 2 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 3 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 4 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 5 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 6 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 7 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 8 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 9 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 0 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 1 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 2 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 3 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 4 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 5 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 6 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 7 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 8 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 9 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 0 */
{UDATA(&como_svc, 0, 0), COML_WAIT}, /* 1 */
};
MTAB coml_mod[] = {
{UNIT_K35 + UNIT_2741, 0, "KSR-37", "KSR-37", NULL, NULL, NULL,
"Standard KSR"},
{UNIT_K35 + UNIT_2741, UNIT_K35, "KSR-35", "KSR-35", NULL, NULL, NULL,
"Upper case only KSR"},
{UNIT_K35 + UNIT_2741, UNIT_2741, "2741", "2741", NULL, NULL, NULL,
"IBM 2741 terminal"},
{MTAB_XTD | MTAB_VUN, 0, NULL, "DISCONNECT",
&tmxr_dscln, NULL, &com_desc, "Disconnect line"},
{MTAB_XTD | MTAB_VUN | MTAB_NC, 0, "LOG", "LOG",
&tmxr_set_log, &tmxr_show_log, &com_desc},
{MTAB_XTD | MTAB_VUN | MTAB_NC, 0, NULL, "NOLOG",
&tmxr_set_nolog, NULL, &com_desc},
{0}
};
REG coml_reg[] = {
{URDATA(TIME, coml_unit[0].wait, 16, 24, 0,
COM_TLINES, REG_NZ + PV_LEFT)},
{NULL}
};
DEVICE coml_dev = {
"COML", coml_unit, coml_reg, coml_mod,
COM_TLINES, 10, 31, 1, 16, 8,
NULL, NULL, &com_reset, NULL, NULL, NULL,
NULL, DEV_DISABLE, 0, NULL, NULL,
NULL, &coml_help, NULL, NULL, &coml_description
};
/* COM: channel select */
uint32 com_cmd(UNIT * uptr, uint16 cmd, uint16 dev)
{
/* Activate the com device */
sim_activate(&com_unit[COM_CHU], 10);
#if 0 /* Commented out until I can detect hangup signal */
if (!sim_is_active(&com_unit[COM_CIU])) /* console */
sim_activate(&com_unit[COM_CIU], com_unit[COM_CIU].wait);
if (!sim_is_active(&com_unit[COM_PLU])) {
if (com_unit[COM_PLU].flags & UNIT_ATT) { /* master att? */
int32 t =
sim_rtcn_init(com_unit[COM_PLU].wait, TMR_COM);
sim_activate(&com_unit[COM_PLU], t);
}
}
#endif
com_sta = 1;
com_dflg = 0;
com_active = 1;
return SCPE_OK;
}
/* Unit service - channel program */
t_stat com_svc(UNIT * uptr)
{
int chan = UNIT_G_CHAN(uptr->flags);
int sel = (uptr->flags & UNIT_SELECT) ? 1 : 0;
uint8 ch;
if (sel != chan_test(chan, CTL_SEL))
return SCPE_OK;
/* Handle disconnect */
if (com_sta != 0 && chan_stat(chan, DEV_DISCO)) {
chan_clear(chan, DEV_WEOR|DEV_SEL);
com_sta = 0;
com_active = 0;
return SCPE_OK;
}
if (chan_test(chan, CTL_SNS)) {
int eor = (com_sta == 4)?DEV_REOR:0;
ch = (com_sense >> ((4 - com_sta) * 4)) & 0xf;
if (ch & 010) /* Move A bit over one */
ch ^= 030;
sim_debug(DEBUG_SNS, &com_dev, "sense unit=%02x\n", ch);
switch(chan_write_char(chan, &ch, eor)) {
case TIME_ERROR:
case END_RECORD:
com_sta = -1;
com_sense = 0;
break;
case DATA_OK:
com_sta++;
}
sim_activate(uptr, 50);
return SCPE_OK;
}
/* Start a command, only do read/write */
if (chan_test(chan, CTL_CNTL)) {
chan_clear(chan, DEV_FULL);
chan_set(chan, DEV_REOR|DEV_SEL);
sim_activate(uptr, 50);
return SCPE_OK;
}
/* Send down next buffer word */
if (chan_test(chan, CTL_READ)) {
/* Send low order character if one */
if (com_dflg) {
ch = com_data & 0377;
sim_debug(DEBUG_DATA, &com_dev, "sent=%02o\n", ch);
switch (chan_write_char(chan, &ch, (com_sta == 3)?DEV_REOR:0)) {
case DATA_OK:
case END_RECORD:
com_dflg = 0;
break;
case TIME_ERROR:
com_sense |= DATA_TIMEOUT;
}
sim_activate(uptr, 50);
return SCPE_OK;
}
switch (com_sta) {
case 1:
com_data = com_msgn; /* 1st char is msg num */
com_msgn = (com_msgn + 1) & 03777; /* incr msg num */
com_sta++;
com_posti = 0;
chan9_clear_error(chan, sel);
break;
case 2:
/* Check if queue empty. */
if (in_head == in_tail) {
com_data = COMI_EOM;
com_sta++;
} else {
/* Grab next entry. */
in_head++;
/* Wrap around end of ring */
if (in_head >= (sizeof(in_buff)/sizeof(uint16)))
in_head = 0;
com_data = in_buff[in_head];
/* Check if end of current transfer */
if (com_data == COMI_EOM)
com_sta++;
in_count--;
}
break;
case 3:
chan_set(chan, DEV_REOR|CTL_END);
sim_activate(uptr, 50);
com_posti = 0;
com_sta++;
return SCPE_OK; /* q empty, done */
}
sim_debug(DEBUG_DATA, &com_dev, "send data=%04o\n", com_data);
ch = (com_data >> 6) & 077;
com_data &= 077;
switch (chan_write_char(chan, &ch, 0)) {
case DATA_OK:
case END_RECORD:
com_dflg = 1;
break;
case TIME_ERROR:
com_sense |= DATA_TIMEOUT;
}
sim_activate(uptr, 50);
return SCPE_OK;
}
if (chan_test(chan, CTL_WRITE)) {
uint32 ln;
/* Read in two characters */
if (com_dflg == 0) {
switch(chan_read_char(chan, &ch, 0)) {
case DATA_OK:
com_dflg = 1;
com_data = (ch & 077) << 6;
break;
case END_RECORD:
case TIME_ERROR:
com_sense |= DATA_TIMEOUT;
}
sim_activate(uptr, 50);
return SCPE_OK;
} else {
switch(chan_read_char(chan, &ch, 0)) {
case DATA_OK:
com_dflg = 0;
com_data |= (ch & 077);
break;
case END_RECORD:
case TIME_ERROR:
com_sense |= DATA_TIMEOUT;
sim_activate(uptr, 50);
return SCPE_OK;
}
}
sim_debug(DEBUG_DATA, &com_dev, "recieved=%04o\n", com_data);
switch (com_sta) {
case 1:
com_oln = com_data;
if (com_data == 07777) { /* turn on? */
sim_debug(DEBUG_DETAIL, &com_dev, "enable\n");
com_enab = 1; /* enable 7750 */
in_delay = 200;
com_msgn = 0; /* init message # */
com_sta = 4;
chan_set(chan, DEV_REOR|CTL_END);
} else if (com_data & COMO_LINCTL) { /* control message? */
ln = COMO_GETLN(com_data); /* line number */
sim_debug(DEBUG_DETAIL, &com_dev, "line %d\n", ln);
if (ln >= (COM_TLINES + COM_LBASE)) /* invalid line? */
return STOP_INVLIN;
if (ln > COM_LBASE) /* valid line? */
com_reset_ln(ln - COM_LBASE);
com_sta = 4;
chan_set(chan, DEV_REOR|CTL_END);
} else /* data message */
com_sta++;
break;
case 2:
com_ocnt = (com_data & 07777) + 1; /* char count plus EOM */
if (com_oln & COMO_LIN12B) {
com_ocnt = com_ocnt << 1; /* 12b double */
com_o12b = 1;
} else
com_o12b = 0;
com_oln = COMO_GETLN(com_oln); /* line number */
sim_debug(DEBUG_DETAIL, &com_dev, "output line %d\n", com_oln);
com_sta++; /* next state */
break;
case 3: /* other words */
ln = com_oln; /* effective line */
/* unpack chars */
if (com_o12b) {
com_ocnt -= 2;
if (com_data == COMO_EOM12B) {
com_sta++;
if (com_ocnt != 0) {
chan9_set_error(chan, SNS_UEND);
com_sense |= PROG_MSGLEN;
}
chan_set(chan, DEV_REOR|CTL_END); /* end, last state */
break; /* EOM? */
}
} else {
com_ocnt--;
if (((com_data >> 6) & 077) == COMO_EOM6B) {
com_sta++;
if (com_ocnt != 0) {
sim_debug(DEBUG_EXP, &com_dev, "messge length error %d\n", com_ocnt);
chan9_set_error(chan, SNS_UEND);
com_sense |= PROG_MSGLEN;
}
chan_set(chan, DEV_REOR|CTL_END); /* end, last state */
break; /* EOM? */
}
sim_debug(DEBUG_DETAIL, &com_dev, "queing %o %d\n", (com_data >> 6) & 077, com_ocnt);
if (com_put(ln, (com_data >> 6) & 077)) {
sim_debug(DEBUG_EXP, &com_dev, "Insert error\n");
chan9_set_error(chan, SNS_UEND);
com_sense |= PROG_FULL;
}
com_ocnt--;
com_data &= 077;
if (com_data == COMO_EOM6B) {
com_sta++;
if (com_ocnt != 0) {
sim_debug(DEBUG_EXP, &com_dev, "messge length error %d\n", com_ocnt);
chan9_set_error(chan, SNS_UEND);
com_sense |= PROG_MSGLEN;
}
chan_set(chan, DEV_REOR|CTL_END); /* end, last state */
break; /* EOM? */
}
}
sim_debug(DEBUG_DETAIL, &com_dev, "queing %o %d\n", com_data, com_ocnt);
if (com_put(ln, com_data)) {
sim_debug(DEBUG_EXP, &com_dev, "Insert error\n");
chan9_set_error(chan, SNS_UEND);
com_sense |= PROG_FULL;
}
break;
}
sim_activate(uptr, 50);
}
return SCPE_OK;
}
/* Unit service - console receive - always running, even if device is not */
t_stat
comti_svc(UNIT * uptr)
{
int32 c;
t_stat r;
sim_activate(uptr, uptr->wait); /* continue poll */
c = sim_poll_kbd(); /* get character */
if (c && (c < SCPE_KFLAG))
return c; /* error? */
if (((com_unit[COM_PLU].flags & UNIT_ATT) == 0) || /* not att, not enab, */
!com_enab || (c & SCPE_BREAK))
return SCPE_OK; /* break? done */
c = c & 0177;
if (c) {
r = com_queue_in(0, c);
if (r != SCPE_OK)
return r;
sim_putchar(c);
if (c == '\r')
sim_putchar('\n');
}
return SCPE_OK;
}
/* Unit service - receive side
Poll all active lines for input
Poll for new connections */
t_stat
comi_svc(UNIT * uptr)
{
int32 c, ln, t;
t_stat r;
if ((uptr->flags & UNIT_ATT) == 0)
return SCPE_OK; /* attached? */
if (in_delay-- <= 0) { /* Check for any inputs to send over. */
in_delay = 50; /* Time to wait for polling again. */
if (!com_active && in_count > 0)
com_post_eom();
}
t = sim_rtcn_calb(com_tps, TMR_COM); /* calibrate */
sim_activate(uptr, t); /* continue poll */
ln = tmxr_poll_conn(&com_desc); /* look for connect */
if (ln >= 0) { /* got one? */
com_ldsc[ln].rcve = 1; /* rcv enabled */
coml_unit[ln].CONN = 1; /* flag connected */
coml_unit[ln].NEEDID = 1; /* need ID */
coml_unit[ln].ECHO = 1; /* echoing output */
}
if (!com_enab)
return SCPE_OK; /* not enabled? exit */
tmxr_poll_rx(&com_desc); /* poll for input */
for (ln = 0; ln < COM_TLINES; ln++) { /* loop thru mux */
if (com_ldsc[ln].conn) { /* connected? */
if (coml_unit[ln].NEEDID)
com_send_id(ln);
c = tmxr_getc_ln(&com_ldsc[ln]); /* get char */
if (c) { /* any char? */
c = c & 0177; /* mask to 7b */
r = com_queue_in(ln, c);
if (r != SCPE_OK)
return r; /* queue char, err? */
if (coml_unit[ln].ECHO && com_ldsc[ln].xmte) { /* output enabled? */
if (coml_unit[ln].flags & UNIT_K35) { /* KSR-35? */
if (islower(c))
c = toupper(c); /* convert LC to UC */
}
tmxr_putc_ln(&com_ldsc[ln], c); /* echo char */
if (c == '\r') /* add LF after CR */
tmxr_putc_ln(&com_ldsc[ln], '\n');
} /* end if enabled */
} /* end if char */
} /* end if conn */
else if (coml_unit[ln].CONN) { /* not conn, was conn? */
coml_unit[ln].CONN = 0; /* clear connected */
coml_unit[ln].NEEDID = 0; /* clear need id */
if (com_inp_msg(ln, COMI_HANGUP)) /* hangup message */
return STOP_NOIFREE;
}
} /* end for */
tmxr_poll_tx(&com_desc); /* poll xmt */
return SCPE_OK;
}
/* Unit service - console transmit */
t_stat
comto_svc(UNIT * uptr)
{
uint16 c, c1;
if (com_out_head[0] == 0)
return com_send_ccmp(0); /* Send out a completion code */
c = com_queue_out(0, &c1); /* get character, cvt */
if (c)
sim_putchar(c); /* printable? output */
if (c1)
sim_putchar(c1); /* second char? output */
sim_activate(uptr, uptr->wait); /* next char */
if (com_comp_cnt[0] >= COMI_CMAX) /* completion needed? */
return com_send_ccmp(0); /* generate msg */
return SCPE_OK;
}
/* Unit service - transmit side */
t_stat
como_svc(UNIT * uptr)
{
uint16 c, c1;
int32 ln = uptr - coml_unit; /* line # */
if (com_out_head[ln] == 0) /* no more characters? */
return com_send_ccmp(ln); /* free any remaining */
if (com_ldsc[ln].conn) { /* connected? */
if (com_ldsc[ln].xmte) { /* output enabled? */
c = com_queue_out(ln, &c1); /* get character, cvt */
if (c)
tmxr_putc_ln(&com_ldsc[ln], c); /* printable? output */
if (c1)
tmxr_putc_ln(&com_ldsc[ln], c1); /* print second */
} /* end if */
tmxr_poll_tx(&com_desc); /* poll xmt */
sim_activate(uptr, uptr->wait); /* next char */
if (com_comp_cnt[ln] >= COMI_CMAX) /* completion needed? */
return com_send_ccmp(ln); /* generate msg */
} /* end if conn */
return SCPE_OK;
}
/* Send ID sequence on input */
t_stat
com_send_id(uint32 ln)
{
com_inp_msg(ln, COMI_DIALUP); /* input message: */
if (coml_unit[ln].flags & UNIT_2741) /* dialup, ID, endID */
com_inp_msg(ln, COMI_2741);
else if (coml_unit[ln].flags & UNIT_K35)
com_inp_msg(ln, COMI_K35);
else
com_inp_msg(ln, COMI_K37);
com_inp_msg(ln, 0);
com_inp_msg(ln, 0);
com_inp_msg(ln, 0);
com_queue_in(ln, 'T');
com_queue_in(ln, '0' + ((ln+1) / 10));
com_queue_in(ln, '0' + ((ln+1) % 10));
if (com_inp_msg(ln, COMI_ENDID)) /* make sure there */
return STOP_NOIFREE; /* was room for msg */
coml_unit[ln].NEEDID = 0;
com_sense |= EXPT_SRVRDY;
return SCPE_OK;
}
/* Translate and queue input character */
t_stat
com_queue_in(uint32 ln, uint16 c)
{
uint16 out;
uint16 parity;
if (c == com_intr)
out = COMI_INTR;
else if (c == com_quit)
out = COMI_QUIT;
else {
if (coml_unit[ln].flags & UNIT_K35) { /* KSR-35? */
if (islower(c))
c = toupper(c); /* convert LC to UC */
}
if ((coml_unit[ln].flags & UNIT_K35) == 0) { /* KSR-37 or 2741 */
if (c == '\r')
c = '\n';
}
if (coml_unit[ln].flags & UNIT_2741) {
c = com_2741_in[c];
if (c & 0200) { /* Check if lower case */
if ((com_out_inesc[ln] & 2) == 0) { /* In upper case? */
uint8 c2;
c2 = com_2741_out[c & 077]; /* Check if no need to change */
if (c2 != com_2741_out[(c&077)|0100]) {
com_inp_msg(ln, 0034); /* Switch case */
com_out_inesc[ln] &= 1;
}
}
} else {
if (com_out_inesc[ln] & 2) { /* In lower case? */
uint8 c2;
c2 = com_2741_out[c & 077]; /* Check if no need to change */
if (c2 != com_2741_out[(c&077)|0100]) {
com_inp_msg(ln, 0037); /* Switch case */
com_out_inesc[ln] |= 2;
}
}
}
c &= 0177;
}
out = (~c) & 0177; /* 1's complement */
parity = out ^ (out >> 4);
parity = parity ^ (parity >> 2);
parity = parity ^ (parity >> 1);
if (parity & 1)
out |= COMI_PARITY; /* add even parity */
}
if (com_inp_msg(ln, out))
return STOP_NOIFREE; /* input message */
com_sense |= EXPT_DATRDY;
return SCPE_OK;
}
/* Retrieve and translate output character */
uint32
com_queue_out(uint32 ln, uint16 * c1)
{
uint16 c, raw;
*c1 = 0; /* assume non-printing */
if (com_get(ln, &raw)) /* Try to get character */
return 0;
if (raw == COMO_BITRPT) { /* insert delay? */
com_skip_outc(ln);
return 0;
}
c = (~raw >> 1) & 0177; /* remove start, parity */
if (coml_unit[ln].flags & UNIT_2741) {
uint8 c2;
c2 = c & 077;
if (com_out_inesc[ln] & 4) {
com_out_inesc[ln] &= 3;
switch (c) {
case '\043': /* Red */
tmxr_putc_ln(&com_ldsc[ln], '\033');
tmxr_putc_ln(&com_ldsc[ln], '[');
tmxr_putc_ln(&com_ldsc[ln], '3');
tmxr_putc_ln(&com_ldsc[ln], '1');
tmxr_putc_ln(&com_ldsc[ln], 'm');
return 0;
case '\023': /* Black */
tmxr_putc_ln(&com_ldsc[ln], '\033');
tmxr_putc_ln(&com_ldsc[ln], '[');
tmxr_putc_ln(&com_ldsc[ln], '0');
tmxr_putc_ln(&com_ldsc[ln], 'm');
return 0;
}
*c1 = c;
return '\033';
}
switch (c2) {
case '\034': com_out_inesc[ln] &= 2; return 0; /* UC */
case '\037': com_out_inesc[ln] |= 1; return 0; /* LC */
case '\076': com_out_inesc[ln] |= 4; return 0; /* Esc */
case '\016': coml_unit[ln].ECHO = FALSE; return 0; /* Poff */
case '\015': coml_unit[ln].ECHO = TRUE; return 0; /* Pon */
}
c2 = com_2741_out[(com_out_inesc[ln]&1)? (0100|c2): c2];
sim_debug(DEBUG_DETAIL, &com_dev, "printing %d %04o '%c' %o\n",
ln, c, (c2>= ' ')?c2: 0, com_out_inesc[ln]&1);
if (c2 == '\n')
*c1 = '\r';
return c2;
}
if (com_out_inesc[ln]) {
com_out_inesc[ln] = 0;
switch (c) {
case '3': /* Red */
tmxr_putc_ln(&com_ldsc[ln], '\033');
tmxr_putc_ln(&com_ldsc[ln], '[');
tmxr_putc_ln(&com_ldsc[ln], '3');
tmxr_putc_ln(&com_ldsc[ln], '1');
tmxr_putc_ln(&com_ldsc[ln], 'm');
return 0;
case '4': /* Black */
tmxr_putc_ln(&com_ldsc[ln], '\033');
tmxr_putc_ln(&com_ldsc[ln], '[');
tmxr_putc_ln(&com_ldsc[ln], '0');
tmxr_putc_ln(&com_ldsc[ln], 'm');
return 0;
case ':': /* Poff */
coml_unit[ln].ECHO = FALSE;
return 0;
case ';': /* Pon */
coml_unit[ln].ECHO = TRUE;
return 0;
}
*c1 = c;
return '\033';
}
sim_debug(DEBUG_DETAIL, &com_dev, "printing %d %04o '%c'\n", ln, c, (c >= ' ')?c:0);
if (c >= 040) { /* printable? */
if (c == 0177)
return 0; /* DEL? ignore */
if ((coml_unit[ln].flags & UNIT_K35) && islower(c)) /* KSR-35 LC? */
c = toupper(c); /* cvt to UC */
return c;
}
switch (c) {
case '\033': /* Escape character */
com_out_inesc[ln] = 1;
return 0;
case '\t':
case '\f':
case '\b':
case '\a': /* valid ctrls */
return c;
case '\r': /* carriage return? */
if (coml_unit[ln].flags & UNIT_K35) /* KSR-35? */
*c1 = '\n'; /* lf after cr */
return c;
case '\n': /* line feed? */
if (!(coml_unit[ln].flags & UNIT_K35)) { /* KSR-37? */
*c1 = '\n'; /* lf after cr */
return '\r';
}
return c; /* print lf */
#if 0
case 022: /* DC2 */
if (!(com_unit[ln].flags & UNIT_K35)) { /* KSR-37? */
com_skip_outc(ln); /* skip next */
return '\n'; /* print lf */
}
break;
case 024: /* DC4 */
if (!(com_unit[ln].flags & UNIT_K35)) /* KSR-37? */
com_skip_outc(ln); /* skip next */
break;
#endif
}
return 0; /* ignore others */
}
/* Generate completion message, if needed */
t_stat
com_send_ccmp(uint32 ln)
{
uint32 t;
t = com_comp_cnt[ln];
if (t != 0) { /* chars not returned? */
if (t > COMI_CMAX)
t = COMI_CMAX; /* limit to max */
com_comp_cnt[ln] -= t; /* keep count */
if (com_inp_msg(ln, COMI_COMP(t))) /* gen completion msg */
return STOP_NOIFREE;
}
return SCPE_OK;
}
/* Skip next char in output queue */
void
com_skip_outc(uint32 ln)
{
uint16 tmp;
if (com_get(ln, &tmp))
com_comp_cnt[ln]++; /* count it */
return;
}
/* List routines - remove from head and free */
t_bool
com_get(int ln, uint16 *ch)
{
uint16 ent;
ent = com_out_head[ln];
if (ent == 0) /* Check if anything to send. */
return TRUE;
*ch = com_buf[ent].data;
com_comp_cnt[ln]++;
com_out_head[ln] = com_buf[ent].link; /* Get next char */
com_buf[ent].link = com_free; /* Put back on free list */
com_free = ent;
if (com_out_head[ln] == 0) { /* done with queue? */
com_out_tail[ln] = 0;
}
return FALSE;
}
/* Put a character onto output queue for a line */
t_bool
com_put(int ln, uint16 ch)
{
uint16 ent;
ln -= COM_LBASE;
ent = com_free; /* Get a character spot */
if (ent == 0)
return TRUE; /* No room */
com_free = com_buf[ent].link; /* Next free character */
com_buf[ent].data = ch;
com_buf[ent].link = 0;
if (com_out_tail[ln] == 0) { /* Idle line */
com_out_head[ln] = ent;
} else { /* Active line */
com_buf[com_out_tail[ln]].link = ent;
}
com_out_tail[ln] = ent;
/* Activate line if not already running */
if (!sim_is_active(&coml_unit[ln]))
sim_activate(&coml_unit[ln], coml_unit[ln].wait);
return FALSE;
}
/* Put EOM on input queue and post interupt to wake up CPU */
void
com_post_eom()
{
int ent;
int chan = UNIT_G_CHAN(com_unit[0].flags);
int sel = (com_unit[0].flags & UNIT_SELECT) ? 1 : 0;
/* See if we can insert a EOM message */
if (in_buff[in_tail] != COMI_EOM) {
sim_debug(DEBUG_EXP, &com_dev, "inserting eom %d %d %d\n",
in_head, in_tail, in_count);
ent = in_tail + 1;
if (ent >= (sizeof(in_buff)/sizeof(uint16))) /* Wrap around */
ent = 0;
if (ent != in_head) { /* If next element would be head, queue is full */
/* If we can't put one on, handler will do it for us */
in_buff[ent] = COMI_EOM;
in_tail = ent;
in_count++;
}
}
chan9_set_attn(chan, sel);
com_posti = 1;
}
/* Insert line and message into input queue */
t_bool
com_inp_msg(uint32 ln, uint16 msg)
{
int ent1, ent2;
sim_debug(DEBUG_EXP, &com_dev, "inserting %d %04o %d %d %d\n", ln, msg,
in_head, in_tail, in_count);
ent1 = in_tail + 1;
if (ent1 >= (sizeof(in_buff)/sizeof(uint16))) /* Wrap around */
ent1 = 0;
if (ent1 == in_head) /* If next element would be head, queue is full */
return TRUE;
ent2 = ent1 + 1;
if (ent2 >= (sizeof(in_buff)/sizeof(uint16))) /* Wrap around */
ent2 = 0;
if (ent2 == in_head) /* If next element would be head, queue is full */
return TRUE;
/* Ok we have room to put this message in. */
ln += COM_LBASE;
in_buff[ent1] = 02000 + ln;
in_buff[ent2] = msg;
in_count += 2;
in_tail = ent2;
/* Check if over limit */
if (!com_active && in_count > 150) {
com_post_eom();
}
return FALSE;
}
/* Reset routine */
t_stat
com_reset(DEVICE * dptr)
{
uint32 i;
if (dptr->flags & DEV_DIS) { /* disabled? */
com_dev.flags = com_dev.flags | DEV_DIS; /* disable lines */
coml_dev.flags = coml_dev.flags | DEV_DIS;
} else {
com_dev.flags = com_dev.flags & ~DEV_DIS; /* enable lines */
coml_dev.flags = coml_dev.flags & ~DEV_DIS;
}
#if 0 /* Commented out until I can detect hangup signal */
sim_activate(&com_unit[COM_CIU], com_unit[COM_CIU].wait); /* console */
sim_cancel(&com_unit[COM_CHU]);
#endif
sim_cancel(&com_unit[COM_PLU]);
if (com_unit[COM_PLU].flags & UNIT_ATT) { /* master att? */
int32 t =
sim_rtcn_init(com_unit[COM_PLU].wait, TMR_COM);
sim_activate(&com_unit[COM_PLU], t);
}
com_enab = 0;
com_msgn = 0;
com_sta = 0;
com_sense = 0;
/* Put dummy message on Queue before first login */
in_head = 0;
in_tail = 0;
in_count = 0;
for (i = 0; i < COM_TLINES; i++) {
com_out_tail[i] = 0;
com_out_head[i] = 0;
com_reset_ln(i);
}
com_free = sizeof(com_buf)/(sizeof(OLIST));
for (i = 1; i < com_free; i++) {
com_buf[i].link = i + 1;
com_buf[i].data = 0;
}
com_buf[com_free - 1].link = 0; /* end of free list */
com_free = 1;
return SCPE_OK;
}
/* Attach master unit */
t_stat
com_attach(UNIT * uptr, CONST char *cptr)
{
t_stat r;
r = tmxr_attach(&com_desc, uptr, cptr); /* attach */
if (r != SCPE_OK)
return r; /* error */
sim_rtcn_init(uptr->wait, TMR_COM);
sim_activate(uptr, 100); /* quick poll */
return SCPE_OK;
}
/* Detach master unit */
t_stat
com_detach(UNIT * uptr)
{
uint32 i;
t_stat r;
r = tmxr_detach(&com_desc, uptr); /* detach */
for (i = 0; i < COM_MLINES; i++)
com_ldsc[i].rcve = 0; /* disable rcv */
sim_cancel(uptr); /* stop poll */
return r;
}
/* Show summary processor */
t_stat
com_summ(FILE * st, UNIT * uptr, int32 val, CONST void *desc)
{
uint32 i, t;
t = 0;
for (i = 0; i < COM_TLINES; i++)
t = t + (com_ldsc[i].conn != 0);
if (t == 1)
fprintf(st, "1 connection");
else
fprintf(st, "%d connections", t);
return SCPE_OK;
}
/* SHOW CONN/STAT processor */
t_stat
com_show(FILE * st, UNIT * uptr, int32 val, CONST void *desc)
{
int32 i, cc;
for (cc = 0; (cc < COM_MLINES) && com_ldsc[cc].conn; cc++) ;
if (cc) {
for (i = 0; i < COM_MLINES; i++) {
if (com_ldsc[i].conn) {
if (val)
tmxr_fconns(st, &com_ldsc[i], i);
else
tmxr_fstats(st, &com_ldsc[i], i);
}
}
} else
fprintf(st, "all disconnected\n");
return SCPE_OK;
}
/* Reset an individual line */
void
com_reset_ln(uint32 ln)
{
uint16 ch;
while (!com_get(ln, &ch)) ;
com_comp_cnt[ln] = 0;
com_out_inesc[ln] = 0;
sim_cancel(&coml_unit[ln]);
if ((ln < COM_MLINES) && (com_ldsc[ln].conn == 0))
coml_unit[ln].CONN = 0;
return;
}
const char *
coml_description(DEVICE *dptr)
{
return "IBM 7750 terminal";
}
t_stat
coml_help(FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr)
{
fprintf (st, "Each COM line can be set to a given type of terminal\n\n");
fprintf (st, " sim> SET COMLn KSR-37 Standard connection\n");
fprintf (st, " sim> SET COMLn KSR-35 Allows only upper case\n");
fprintf (st, " sim> SET COMLn 2741 Set to look like a 2741\n");
fprint_set_help (st, dptr);
fprint_show_help (st, dptr);
return SCPE_OK;
}
const char *
com_description(DEVICE *dptr)
{
return "IBM 7750 terminal controller";
}
t_stat
com_help(FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr)
{
fprintf (st, "IBM 7750 terminal controller, this is required for CTSS to run.\n");
fprintf (st, "The ATTACH command specifies the port to be used:\n\n");
tmxr_attach_help (st, dptr, uptr, flag, cptr);
help_set_chan_type(st, dptr, "IBM 7750");
#ifndef I7010
fprintf (st, "Each device on the channel can be at either select 0 or 1, \n");
fprintf (st, "this is set with the\n\n");
fprintf (st, " sim> SET COM SELECT=n\n\n");
#endif
fprint_set_help (st, dptr);
fprint_show_help (st, dptr);
return SCPE_OK;
}
#endif