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rcornwell.sims/ICL1900/icl1900_tr.c
Richard Cornwell c3490e1484 ICL1900: Remove compiler warnings.
2020-10-12 23:27:46 -04:00

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/* icl1900_tr.c: ICL1900 Paper Tape Reader simulator
Copyright (c) 2018, 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 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 Richard Cornwell
*/
#include "icl1900_defs.h"
#ifndef NUM_DEVS_PTR
#define NUM_DEVS_PTR 0
#endif
#if (NUM_DEVS_PTR > 0)
#define PP_V_MODE (UNIT_V_UF + 0)
#define PP_M_MODE (3 << PP_V_MODE)
#define PP_MODE(x) ((PP_M_MODE & (x)) >> PP_V_MODE)
#define UNIT_V_TYPE (UNIT_V_UF + 2)
#define UNIT_TYPE (0xf << UNIT_V_TYPE)
#define GET_TYPE(x) ((UNIT_TYPE & (x)) >> UNIT_V_TYPE)
#define SET_TYPE(x) (UNIT_TYPE & ((x) << UNIT_V_TYPE))
#define NSI_TYPE(x) ((GET_TYPE(x) & 1) == 0)
#define SI_TYPE(x) ((GET_TYPE(x) & 1) != 0)
#define PP_MODE_7B 0
#define PP_MODE_7P 1
#define PP_MODE_7X 2
#define CMD u3
#define STATUS u4
#define HOLD u5
#define ALPHA_MODE 0001
#define BETA_MODE 0000
#define BIN_MODE 0002
#define IGN_BLNK 0004
#define DISC 0010
#define BUSY 0020
#define DELTA_MODE 0040
#define STOP_CHAR 0100
#define TERMINATE 001
#define OPAT 002
#define ERROR 004
#define ACCEPT 020
#define ALPHA_SHIFT 074
#define BETA_SHIFT 075
#define DELTA_SHIFT 076
#define T1915_1 0
#define T1915_2 1
#define T1916_1 2
#define T1916_2 3
#define UNIT_PTR(x) UNIT_ADDR(x)|SET_TYPE(T1915_2)|UNIT_ATTABLE|\
UNIT_DISABLE|UNIT_RO|TT_MODE_7B
/*
* Character translation.
*
* Alpha shift 074
* Beta shift 075
* Delta shift 076
*
* p000xxxx Delta + 01xxxx
* p001xxxx Delta + 00xxxx
* p10111xx Delta + 1101xx
* p11111xx Delta + 1110xx
* p010xxxx 01xxxx
* p011xxxx 00xxxx
* p100xxxx Alpha + 10xxxx
* p101xxxx Alpha + 11xxxx xxxx < 4
* p110xxxx Beta + 10xxxx
* p111xxxx Beta + 11xxxx xxxx < 4
*
* Two modes Alpha and Beta. Delta is always output.
*
* Graphics mode translation.
*
* p010xxxx 01xxxx
* p011xxxx 00xxxx
* p100xxxx 10xxxx
* p101xxxx 11xxxx
* p110xxxx 10xxxx
* p111xxxx 11xxxx
*
*/
void ptr_cmd (uint32 dev, uint32 cmd, uint32 *resp);
void ptr_nsi_cmd (uint32 dev, uint32 cmd);
void ptr_nsi_status (uint32 dev, uint32 *resp);
t_stat ptr_svc (UNIT *uptr);
t_stat ptr_reset (DEVICE *dptr);
t_stat ptr_boot (int32 unit_num, DEVICE * dptr);
t_stat ptr_attach(UNIT *, CONST char *);
t_stat ptr_detach(UNIT *);
t_stat ptr_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr);
CONST char *ptr_description (DEVICE *dptr);
DIB ptr_dib = { CHAR_DEV, &ptr_cmd, &ptr_nsi_cmd, &ptr_nsi_status };
UNIT ptr_unit[] = {
{ UDATA (&ptr_svc, UNIT_PTR(4), 0), 10000 },
{ UDATA (&ptr_svc, UNIT_PTR(5), 0), 10000 },
};
MTAB ptr_mod[] = {
{ PP_M_MODE, PP_MODE_7B << PP_V_MODE, "7b", "7B", NULL },
{ PP_M_MODE, PP_MODE_7P << PP_V_MODE, "7p", "7P", NULL },
{ PP_M_MODE, PP_MODE_7X << PP_V_MODE, "7x", "7X", NULL },
{ UNIT_TYPE, SET_TYPE(T1915_1), "1915/1", "1915/1", NULL, NULL, NULL, "ICL 1915/1 NSI 300CPM reader."},
{ UNIT_TYPE, SET_TYPE(T1915_2), "1915/2", "1915/2", NULL, NULL, NULL, "ICL 1912/2 SI 300CPM reader."},
{ UNIT_TYPE, SET_TYPE(T1916_1), "1916/1", "1916/1", NULL, NULL, NULL, "ICL 1916/1 NSI 1000CPM reader."},
{ UNIT_TYPE, SET_TYPE(T1916_2), "1916/2", "1916/2", NULL, NULL, NULL, "ICL 1916/2 SI 1000CPM reader."},
{MTAB_XTD | MTAB_VUN | MTAB_VALR, 0, "DEV", "DEV", &set_chan, &get_chan, NULL, "Device Number"},
{ 0 }
};
DEVICE ptr_dev = {
"TR", ptr_unit, NULL, ptr_mod,
NUM_DEVS_PTR, 8, 22, 1, 8, 22,
NULL, NULL, &ptr_reset, &ptr_boot, &ptr_attach, &ptr_detach,
&ptr_dib, DEV_DISABLE | DEV_DEBUG, 0, dev_debug,
NULL, NULL, &ptr_help, NULL, NULL, &ptr_description
};
/*
* Command codes
*
* 001xxx Read
* 001xx0 Start in current shift
* 001xx1 Start in alpha shift
* 001x1x Graphics
* 001x0x BCD.
* 0011xx Ignore blank tape and erase
* 0010xx Read Blank and erase
* 010000 Send Q.
* 010100 Send P.
* 011110 Disconnect.
*/
void ptr_cmd(uint32 dev, uint32 cmd, uint32 *resp) {
uint32 i;
UNIT *uptr = NULL;
*resp = 0;
/* Find the unit from dev */
for (i = 0; i < ptr_dev.numunits; i++) {
if (GET_UADDR(ptr_unit[i].flags) == dev) {
uptr = &ptr_unit[i];
break;
}
}
/* Should not happen, but just in case */
if (uptr == NULL)
return;
/* Ignore this command if not a SI device */
if (NSI_TYPE(uptr->flags))
return;
if ((uptr->flags & UNIT_ATT) == 0)
return;
cmd &= 077;
switch(cmd & 070) {
case 010: /* Command */
if ((uptr->flags & UNIT_ATT) == 0)
break;
if (uptr->CMD & BUSY) {
*resp = 3;
break;
}
sim_debug(DEBUG_CMD, &ptr_dev, "CMD: %03o %03o %03o\n", cmd, uptr->CMD, uptr->STATUS);
uptr->CMD &= 1;
uptr->CMD |= BUSY| (cmd & 07);
uptr->STATUS = 0;
sim_activate(uptr, uptr->wait);
chan_clr_done(dev);
*resp = 5;
break;
case 020: if (cmd == 020) { /* Send Q */
*resp = uptr->STATUS & TERMINATE;
if ((uptr->flags & UNIT_ATT) == 0) {
*resp = 040;
if ((uptr->CMD & BUSY) == 0)
*resp |= 030;
}
if ((uptr->STATUS & ERROR) == 0)
*resp |= 040;
sim_debug(DEBUG_STATUS, &ptr_dev, "STATUS: %03o %03o\n", cmd, *resp);
uptr->STATUS &= ~TERMINATE;
} else if (cmd == 024) { /* Send P */
if ((uptr->flags & UNIT_ATT) != 0)
*resp = 1;
if ((uptr->STATUS & ERROR) != 0)
*resp |= 2;
sim_debug(DEBUG_STATUS, &ptr_dev, "STATUS: %03o %03o\n", cmd, *resp);
uptr->STATUS = 0;
chan_clr_done(dev);
}
break;
case 030: if (cmd == 036) { /* Disconnect */
uptr->CMD |= DISC;
*resp = 5;
}
break;
default:
break;
}
}
/*
* Command codes
*
* xxxx01 Start reader.
* xxxx10 Stop reader.
* xxx1xx Stop on return, else only stop on count.
* xx1xxx Start in Previous shift, else alpha.
* x1xxxx Graphics mode.
* 1xxxxx All characters.
*/
void ptr_nsi_cmd(uint32 dev, uint32 cmd) {
uint32 i;
UNIT *uptr = NULL;
/* Find the unit from dev */
for (i = 0; i < ptr_dev.numunits; i++) {
if (GET_UADDR(ptr_unit[i].flags) == dev) {
uptr = &ptr_unit[i];
break;
}
}
/* Should not happen, but just in case */
if (uptr == NULL)
return;
/* Ignore this command if not a SI device */
if (SI_TYPE(uptr->flags))
return;
if (cmd & 02) {
if (uptr->CMD & BUSY)
uptr->CMD |= DISC;
sim_debug(DEBUG_CMD, &ptr_dev, "Stop: %03o\n", cmd);
return;
}
if (cmd & 01) {
if (uptr->CMD & BUSY || (uptr->flags & UNIT_ATT) == 0) {
uptr->STATUS |= OPAT;
chan_set_done(dev);
return;
}
if (cmd & 010)
uptr->CMD &= ALPHA_MODE;
else
uptr->CMD = ALPHA_MODE;
if (cmd & 004)
uptr->CMD |= STOP_CHAR;
if (cmd & 020)
uptr->CMD |= BIN_MODE;
if ((cmd & 040) == 0)
uptr->CMD |= IGN_BLNK;
uptr->CMD |= BUSY;
uptr->STATUS = 0;
sim_debug(DEBUG_CMD, &ptr_dev, "Start: %03o\n", cmd);
sim_activate(uptr, uptr->wait);
chan_clr_done(dev);
}
}
/*
* NSI Status bits.
*
* 001 End.
* 002 Opat.
* 004 ERROR
* 020 ACCEPT
* 040 BUSY
*/
void ptr_nsi_status(uint32 dev, uint32 *resp) {
uint32 i;
UNIT *uptr = NULL;
*resp = 0;
/* Find the unit from dev */
for (i = 0; i < ptr_dev.numunits; i++) {
if (GET_UADDR(ptr_unit[i].flags) == dev) {
uptr = &ptr_unit[i];
break;
}
}
/* Should not happen, but just in case */
if (uptr == NULL)
return;
/* Ignore this command if not a SI device */
if (SI_TYPE(uptr->flags))
return;
*resp = uptr->STATUS;
if (uptr->CMD & BUSY)
*resp |= 040;
sim_debug(DEBUG_STATUS, &ptr_dev, "STATUS: %03o\n", *resp);
uptr->STATUS = 0;
chan_clr_done(dev);
}
t_stat ptr_svc (UNIT *uptr)
{
int dev = GET_UADDR(uptr->flags);
uint8 ch;
uint8 shift = 0;
int data;
int eor;
/* Handle a disconnect request */
if (uptr->CMD & DISC) {
uptr->CMD &= 1;
chan_set_done(dev);
return SCPE_OK;
}
/* If not busy, false schedule, just exit */
if ((uptr->CMD & BUSY) == 0)
return SCPE_OK;
if (uptr->HOLD != 0) {
ch = uptr->HOLD & 077;
uptr->HOLD = 0;
eor = chan_input_char(dev, &ch, 0);
if (eor) {
uptr->CMD &= 1;
chan_set_done(dev);
uptr->STATUS = TERMINATE;
return SCPE_OK;
}
if ((uptr->CMD & STOP_CHAR) != 0 && uptr->HOLD == 032)
uptr->STATUS |= TERMINATE;
}
/* Read next charater */
if (feof(uptr->fileref) || (data = getc (uptr->fileref)) == EOF) {
uptr->CMD &= 1;
sim_debug(DEBUG_DETAIL, &ptr_dev, "Tape Empty\n");
detach_unit(uptr);
chan_set_done(dev);
uptr->STATUS = TERMINATE|OPAT;
return SCPE_OK;
}
sim_debug(DEBUG_DATA, &ptr_dev, "data: %03o\n", data);
/* Check parity is even */
if (PP_MODE(uptr->flags) == PP_MODE_7P) {
ch = data ^ (data >> 4);
ch = ch ^ (ch >> 2);
ch = ch ^ (ch >> 1);
if (ch != 0)
uptr->STATUS = TERMINATE | ERROR;
chan_set_done(dev);
} else if (PP_MODE(uptr->flags) == PP_MODE_7X) {
if (data == 0243) {
data = 044;
} else if (data == 044) {
data = 0174;
}
}
data &= 0177;
if ((data == 0 || data == 0177) && (uptr->CMD & IGN_BLNK) != 0) {
sim_activate (uptr, uptr->wait); /* try again */
return SCPE_OK;
}
ch = 0;
if (uptr->CMD & BIN_MODE) {
switch (data & 0160) {
case 0000:
case 0020: /* Terminate */
uptr->STATUS |= TERMINATE;
chan_set_done(dev);
uptr->CMD &= 1;
return SCPE_OK;
case 0040:
ch = 020 | (data & 017);
break;
case 0060:
ch = 000 | (data & 017);
break;
case 0100:
case 0140:
ch = 040 | (data & 017);
break;
case 0120:
case 0160:
ch = 060 | (data & 017);
break;
}
sim_debug(DEBUG_DATA, &ptr_dev, "xlt: '%c' %03o\n", data, ch);
} else {
switch (data & 0160) {
case 0000:
case 0020:
if ((uptr->CMD & STOP_CHAR) != 0 && data == 012)
uptr->STATUS |= TERMINATE;
shift = DELTA_SHIFT;
ch = (data & 017);
break;
case 0040:
ch = 020 | (data & 017);
break;
case 0060:
ch = 000 | (data & 017);
break;
case 0140:
if ((data & 017) > 013) {
shift = DELTA_SHIFT;
ch = 070 | (data & 03);
break;
}
/* Fall Through */
case 0100:
if ((uptr->CMD & 1) == BETA_MODE)
shift = ALPHA_SHIFT;
uptr->CMD |= ALPHA_MODE;
ch = 040 | (data & 037);
break;
case 0160:
if ((data & 017) > 013) {
shift = DELTA_SHIFT;
ch = 064 | (data & 03);
break;
}
/* Fall Through */
case 0120:
if ((uptr->CMD & 1) == ALPHA_MODE)
shift = BETA_SHIFT;
uptr->CMD &= ~ALPHA_MODE;
ch = 040 | (data & 037);
break;
}
}
/* Check if error */
if (shift != 0) {
eor = chan_input_char(dev, &shift, 0);
if (eor && ch != 0) {
uptr->STATUS |= TERMINATE;
chan_set_done(dev);
uptr->CMD &= 1;
uptr->HOLD = 0100 | ch;
return SCPE_OK;
}
}
eor = chan_input_char(dev, &ch, 0);
if (eor) {
uptr->STATUS |= TERMINATE;
chan_set_done(dev);
uptr->CMD &= 1;
return SCPE_OK;
}
if (uptr->STATUS & TERMINATE) {
chan_set_done(dev);
uptr->CMD &= 1;
return SCPE_OK;
}
sim_activate (uptr, uptr->wait); /* try again */
return SCPE_OK;
}
/* Reset */
t_stat ptr_reset (DEVICE *dptr)
{
UNIT *uptr = dptr->units;
int unit;
for (unit = 0; unit < NUM_DEVS_PTR; unit++, uptr++) {
uptr->CMD = ALPHA_MODE;
uptr->STATUS = 0;
uptr->HOLD = 0;
chan_clr_done(GET_UADDR(uptr->flags));
}
return SCPE_OK;
}
/* Boot from given device */
t_stat
ptr_boot(int32 unit_num, DEVICE * dptr)
{
UNIT *uptr = &dptr->units[unit_num];
int dev = GET_UADDR(uptr->flags);
if ((uptr->flags & UNIT_ATT) == 0)
return SCPE_UNATT; /* attached? */
M[64 + dev] = 0;
M[256 + 4 * dev] = 0;
M[257 + 4 * dev] = 0;
loading = 1;
uptr->CMD = BUSY|ALPHA_MODE|BIN_MODE|IGN_BLNK;
sim_activate (uptr, uptr->wait);
return SCPE_OK;
}
t_stat
ptr_attach(UNIT * uptr, CONST char *file)
{
t_stat r;
if ((r = attach_unit(uptr, file)) != SCPE_OK)
return r;
uptr->STATUS = 0;
chan_set_done(GET_UADDR(uptr->flags));
return SCPE_OK;
}
t_stat
ptr_detach(UNIT * uptr)
{
return detach_unit(uptr);
}
t_stat ptr_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr)
{
fprintf (st, "The Paper Tape Reader can be set to one of two modes: 7P, or 7B\n\n");
fprintf (st, " 7P Process even parity input tapes. \n");
fprintf (st, " 7B Ignore parity of input data.\n");
fprintf (st, " 7X Ignore parity and translate British Pound to correct character\n");
fprintf (st, "The default mode is 7B.\n\n");
fprintf (st, "The device number can be set with DEV=# command.\n");
return SCPE_OK;
}
CONST char *ptr_description (DEVICE *dptr)
{
return "PTR";
}
#endif
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