/* pdp1_lp.c: PDP-1 line printer 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
bused in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
lpt Type 62 line printer for the PDP-1
19-Jan-07 RMS Added UNIT_TEXT flag
21-Dec-06 RMS Added 16-channel SBS support
07-Sep-03 RMS Changed ioc to ios
23-Jul-03 RMS Fixed bugs in instruction decoding, overprinting
Revised to detect I/O wait hang
25-Apr-03 RMS Revised for extended file support
30-May-02 RMS Widened POS to 32b
13-Apr-01 RMS Revised for register arrays
*/
#include "pdp1_defs.h"
#define BPTR_MAX 40 /* pointer max */
#define LPT_BSIZE (BPTR_MAX * 3) /* line size */
#define BPTR_MASK 077 /* buf ptr mask */
int32 lpt_spc = 0; /* print (0) vs spc */
int32 lpt_ovrpr = 0; /* overprint */
int32 lpt_stopioe = 0; /* stop on error */
int32 lpt_bptr = 0; /* buffer ptr */
int32 lpt_sbs = 0; /* SBS level */
char lpt_buf[LPT_BSIZE + 1] = { 0 };
static const unsigned char lpt_trans[64] = {
' ','1','2','3','4','5','6','7','8','9','\'','~','#','V','^','<',
'0','/','S','T','U','V','W','X','Y','Z','"',',','>','^','-','?',
'@','J','K','L','M','N','O','P','Q','R','$','=','-',')','-','(',
'_','A','B','C','D','E','F','G','H','I','*','.','+',']','|','['
};
extern int32 ios, cpls, iosta;
extern int32 stop_inst;
t_stat lpt_svc (UNIT *uptr);
t_stat lpt_reset (DEVICE *dptr);
/* LPT data structures
lpt_dev LPT device descriptor
lpt_unit LPT unit
lpt_reg LPT register list
*/
UNIT lpt_unit = {
UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_TEXT, 0), SERIAL_OUT_WAIT
};
REG lpt_reg[] = {
{ ORDATA (BUF, lpt_unit.buf, 8) },
{ FLDATA (PNT, iosta, IOS_V_PNT) },
{ FLDATA (SPC, iosta, IOS_V_SPC) },
{ FLDATA (RPLS, cpls, CPLS_V_LPT) },
{ DRDATA (BPTR, lpt_bptr, 6) },
{ ORDATA (LPT_STATE, lpt_spc, 6), REG_HRO },
{ FLDATA (LPT_OVRPR, lpt_ovrpr, 0), REG_HRO },
{ DRDATA (POS, lpt_unit.pos, T_ADDR_W), PV_LEFT },
{ DRDATA (TIME, lpt_unit.wait, 24), PV_LEFT },
{ FLDATA (STOP_IOE, lpt_stopioe, 0) },
{ BRDATA (LBUF, lpt_buf, 8, 8, LPT_BSIZE) },
{ DRDATA (SBSLVL, lpt_sbs, 4), REG_HRO },
{ NULL }
};
MTAB lpt_mod[] = {
{ MTAB_XTD|MTAB_VDV, 0, "SBSLVL", "SBSLVL",
&dev_set_sbs, &dev_show_sbs, (void *) &lpt_sbs },
{ 0 }
};
DEVICE lpt_dev = {
"LPT", &lpt_unit, lpt_reg, lpt_mod,
1, 10, 31, 1, 8, 8,
NULL, NULL, &lpt_reset,
NULL, NULL, NULL,
NULL, DEV_DISABLE
};
/* Line printer IOT routine */
int32 lpt (int32 inst, int32 dev, int32 dat)
{
int32 i;
if (lpt_dev.flags & DEV_DIS) /* disabled? */
return (stop_inst << IOT_V_REASON) | dat; /* stop if requested */
if ((inst & 07000) == 01000) { /* fill buf */
if (lpt_bptr < BPTR_MAX) { /* limit test ptr */
i = lpt_bptr * 3; /* cvt to chr ptr */
lpt_buf[i] = lpt_trans[(dat >> 12) & 077];
lpt_buf[i + 1] = lpt_trans[(dat >> 6) & 077];
lpt_buf[i + 2] = lpt_trans[dat & 077];
}
lpt_bptr = (lpt_bptr + 1) & BPTR_MASK;
return dat;
}
if ((inst & 07000) == 02000) { /* space */
iosta = iosta & ~IOS_SPC; /* space, clear flag */
lpt_spc = (inst >> 6) & 077; /* state = space n */
}
else if ((inst & 07000) == 00000) { /* print */
iosta = iosta & ~IOS_PNT; /* clear flag */
lpt_spc = 0; /* state = print */
}
else return (stop_inst << IOT_V_REASON) | dat; /* not implemented */
if (GEN_CPLS (inst)) { /* comp pulse? */
ios = 0; /* clear flop */
cpls = cpls | CPLS_LPT; /* request completion */
}
else cpls = cpls & ~CPLS_LPT;
sim_activate (&lpt_unit, lpt_unit.wait); /* activate */
return dat;
}
/* Unit service, printer is in one of three states
lpt_spc = 000 write buffer to file, set overprint
lpt_iot = 02x space command x, clear overprint
*/
t_stat lpt_svc (UNIT *uptr)
{
int32 i;
static const char *lpt_cc[] = {
"\n",
"\n\n",
"\n\n\n",
"\n\n\n\n\n\n",
"\n\n\n\n\n\n\n\n\n\n\n",
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n",
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n",
"\f"
};
if (cpls & CPLS_LPT) { /* completion pulse? */
ios = 1; /* restart */
cpls = cpls & ~CPLS_LPT; /* clr pulse pending */
}
dev_req_int (lpt_sbs); /* req interrupt */
if (lpt_spc) { /* space? */
iosta = iosta | IOS_SPC; /* set flag */
if ((uptr->flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (lpt_stopioe, SCPE_UNATT);
fputs (lpt_cc[lpt_spc & 07], uptr->fileref); /* print cctl */
uptr->pos = ftell (uptr->fileref); /* update position */
if (ferror (uptr->fileref)) { /* error? */
perror ("LPT I/O error");
clearerr (uptr->fileref);
return SCPE_IOERR;
}
lpt_ovrpr = 0; /* dont overprint */
}
else {
iosta = iosta | IOS_PNT; /* print */
if ((uptr->flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (lpt_stopioe, SCPE_UNATT);
if (lpt_ovrpr) /* overprint? */
fputc ('\r', uptr->fileref);
fputs (lpt_buf, uptr->fileref); /* print buffer */
uptr->pos = ftell (uptr->fileref); /* update position */
if (ferror (uptr->fileref)) { /* test error */
perror ("LPT I/O error");
clearerr (uptr->fileref);
return SCPE_IOERR;
}
lpt_bptr = 0;
for (i = 0; i <= LPT_BSIZE; i++) /* clear buffer */
lpt_buf[i] = 0;
lpt_ovrpr = 1; /* set overprint */
}
return SCPE_OK;
}
/* Reset routine */
t_stat lpt_reset (DEVICE *dptr)
{
int32 i;
lpt_bptr = 0; /* clear buffer ptr */
for (i = 0; i <= LPT_BSIZE; i++) /* clear buffer */
lpt_buf[i] = 0;
lpt_spc = 0; /* clear state */
lpt_ovrpr = 0; /* clear overprint */
cpls = cpls & ~CPLS_LPT;
iosta = iosta & ~(IOS_PNT | IOS_SPC); /* clear flags */
sim_cancel (&lpt_unit); /* deactivate unit */
return SCPE_OK;
}