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pdp11_lp.c
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/* pdp11_lp.c: PDP-11 line printer simulator
Copyright (c) 1993-2021, 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.
lpt LP11 line printer
20-Mar-21 RMS Reverted use of ftell for pipe compatibility
19-Jan-07 RMS Added UNIT_TEXT flag
07-Jul-05 RMS Removed extraneous externs
19-May-03 RMS Revised for new conditional compilation scheme
25-Apr-03 RMS Revised for extended file support
29-Sep-02 RMS Added vector change/display support
New data structures
30-May-02 RMS Widened POS to 32b
06-Jan-02 RMS Added enable/disable support
09-Nov-01 RMS Added VAX support
07-Sep-01 RMS Revised interrupt mechanism
30-Oct-00 RMS Standardized register naming
*/
#if defined (VM_PDP10) /* PDP10 version */
#error "LP11 is not supported on the PDP-10!"
#elif defined (VM_VAX) /* VAX version */
#include "vax_defs.h"
#else /* PDP-11 version */
#include "pdp11_defs.h"
#endif
#define LPTCSR_IMP (CSR_ERR + CSR_DONE + CSR_IE) /* implemented */
#define LPTCSR_RW (CSR_IE) /* read/write */
int32 lpt_csr = 0; /* control/status */
int32 lpt_stopioe = 0; /* stop on error */
t_stat lpt_rd (int32 *data, int32 PA, int32 access);
t_stat lpt_wr (int32 data, int32 PA, int32 access);
t_stat lpt_svc (UNIT *uptr);
t_stat lpt_reset (DEVICE *dptr);
t_stat lpt_attach (UNIT *uptr, CONST char *ptr);
t_stat lpt_detach (UNIT *uptr);
t_stat lpt_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr);
const char *lpt_description (DEVICE *dptr);
/* LPT data structures
lpt_dev LPT device descriptor
lpt_unit LPT unit descriptor
lpt_reg LPT register list
*/
#define IOLN_LPT 004
DIB lpt_dib = {
IOBA_AUTO, IOLN_LPT, &lpt_rd, &lpt_wr,
1, IVCL (LPT), VEC_AUTO, { NULL }
};
UNIT lpt_unit = {
UDATA (&lpt_svc, UNIT_SEQ+UNIT_ATTABLE+UNIT_TEXT, 0), SERIAL_OUT_WAIT
};
REG lpt_reg[] = {
{ GRDATA (BUF, lpt_unit.buf, DEV_RDX, 8, 0) },
{ GRDATA (CSR, lpt_csr, DEV_RDX, 16, 0) },
{ FLDATA (INT, IREQ (LPT), INT_V_LPT) },
{ FLDATA (ERR, lpt_csr, CSR_V_ERR) },
{ FLDATA (DONE, lpt_csr, CSR_V_DONE) },
{ FLDATA (IE, lpt_csr, CSR_V_IE) },
{ DRDATA (POS, lpt_unit.pos, T_ADDR_W), PV_LEFT },
{ DRDATA (TIME, lpt_unit.wait, 24), PV_LEFT },
{ FLDATA (STOP_IOE, lpt_stopioe, 0) },
{ GRDATA (DEVADDR, lpt_dib.ba, DEV_RDX, 32, 0), REG_HRO },
{ GRDATA (DEVVEC, lpt_dib.vec, DEV_RDX, 16, 0), REG_HRO },
{ NULL }
};
MTAB lpt_mod[] = {
{ MTAB_XTD|MTAB_VDV|MTAB_VALR, 004, "ADDRESS", "ADDRESS",
&set_addr, &show_addr, NULL, "Bus address" },
{ MTAB_XTD|MTAB_VDV|MTAB_VALR, 0, "VECTOR", "VECTOR",
&set_vec, &show_vec, NULL, "Interrupt vector" },
{ 0 }
};
DEVICE lpt_dev = {
"LPT", &lpt_unit, lpt_reg, lpt_mod,
1, 10, 31, 1, DEV_RDX, 8,
NULL, NULL, &lpt_reset,
NULL, &lpt_attach, &lpt_detach,
&lpt_dib, DEV_DISABLE | DEV_UBUS | DEV_QBUS, 0,
NULL, NULL, NULL, &lpt_help, NULL, NULL,
&lpt_description
};
/* Line printer routines
lpt_rd I/O page read
lpt_wr I/O page write
lpt_svc process event (printer ready)
lpt_reset process reset
lpt_attach process attach
lpt_detach process detach
*/
t_stat lpt_rd (int32 *data, int32 PA, int32 access)
{
if ((PA & 02) == 0) /* csr */
*data = lpt_csr & LPTCSR_IMP;
else *data = lpt_unit.buf; /* buffer */
return SCPE_OK;
}
t_stat lpt_wr (int32 data, int32 PA, int32 access)
{
if ((PA & 02) == 0) { /* csr */
if (PA & 1)
return SCPE_OK;
if ((data & CSR_IE) == 0)
CLR_INT (LPT);
else if ((lpt_csr & (CSR_DONE + CSR_IE)) == CSR_DONE)
SET_INT (LPT);
lpt_csr = (lpt_csr & ~LPTCSR_RW) | (data & LPTCSR_RW);
}
else { /* buffer */
if ((PA & 1) == 0)
lpt_unit.buf = data & 0177;
lpt_csr = lpt_csr & ~CSR_DONE;
CLR_INT (LPT);
if ((lpt_unit.buf == 015) || (lpt_unit.buf == 014) ||
(lpt_unit.buf == 012)) sim_activate (&lpt_unit, lpt_unit.wait);
else sim_activate (&lpt_unit, 0);
}
return SCPE_OK;
}
t_stat lpt_svc (UNIT *uptr)
{
lpt_csr = lpt_csr | CSR_ERR | CSR_DONE;
if (lpt_csr & CSR_IE)
SET_INT (LPT);
if ((uptr->flags & UNIT_ATT) == 0)
return IORETURN (lpt_stopioe, SCPE_UNATT);
fputc (uptr->buf & 0177, uptr->fileref);
if (ferror (uptr->fileref)) {
sim_perror ("LPT I/O error");
clearerr (uptr->fileref);
return SCPE_IOERR;
}
uptr->pos = uptr->pos + 1;
lpt_csr = lpt_csr & ~CSR_ERR;
return SCPE_OK;
}
t_stat lpt_reset (DEVICE *dptr)
{
lpt_unit.buf = 0;
lpt_csr = CSR_DONE;
if ((lpt_unit.flags & UNIT_ATT) == 0)
lpt_csr = lpt_csr | CSR_ERR;
CLR_INT (LPT);
sim_cancel (&lpt_unit); /* deactivate unit */
return SCPE_OK;
}
t_stat lpt_attach (UNIT *uptr, CONST char *cptr)
{
t_stat reason;
lpt_csr = lpt_csr & ~CSR_ERR;
sim_switches |= SWMASK('A');
reason = attach_unit (uptr, cptr);
if ((lpt_unit.flags & UNIT_ATT) == 0)
lpt_csr = lpt_csr | CSR_ERR;
return reason;
}
t_stat lpt_detach (UNIT *uptr)
{
lpt_csr = lpt_csr | CSR_ERR;
return detach_unit (uptr);
}
t_stat lpt_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr)
{
fprintf (st, "Line Printer (LPT)\n\n");
fprintf (st, "The line printer (LPT) writes data to a disk file. The POS register specifies\n");
fprintf (st, "the number of the next data item to be written. Thus, by changing POS, the\n");
fprintf (st, "user can backspace or advance the printer.\n\n");
fprintf (st, "The default position after ATTACH is to position at the end of an existing file.\n");
fprintf (st, "A new file can be created if you attach with the -N switch.\n\n");
fprint_set_help (st, dptr);
fprint_show_help (st, dptr);
fprint_reg_help (st, dptr);
fprintf (st, "\nError handling is as follows:\n\n");
fprintf (st, " error STOP_IOE processed as\n");
fprintf (st, " not attached 1 out of paper\n");
fprintf (st, " 0 disk not ready\n\n");
fprintf (st, " OS I/O error x report error and stop\n");
return SCPE_OK;
}
const char *lpt_description (DEVICE *dptr)
{
return (UNIBUS) ? "LP11 line printer" :
"LPV11 line printer";
}