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H316, NOVA, PDP11, PDP8, PDP18B, KX10: Record Sequential updates consistently

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Devices that do single character I/O could be attached to non seekable
host OS devices (tty, pipes, etc.) and thus shouldn't count on fseek()
and ftell().  These DEVICEs on these simulators do single character I/O
and easily can update their POS REGisters to reflect how much data has
been emitted.  Changing such a REGister will have no  useful effect
when attached to a non seekable file.
This commit is contained in:
Mark Pizzolato
2021-06-08 14:25:23 -07:00
parent 3597772a08
commit e519c93ebf
6 changed files with 9 additions and 9 deletions
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2
NOVA/nova_lp.c
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@@ -133,12 +133,12 @@ DEV_UPDATE_INTR ;
if ((lpt_unit.flags & UNIT_ATT) == 0) /* attached? */
return IORETURN (lpt_stopioe, SCPE_UNATT);
fputc (uptr->buf, uptr->fileref);
uptr->pos = ftell (uptr->fileref);
if (ferror (uptr->fileref)) {
sim_perror ("LPT I/O error");
clearerr (uptr->fileref);
return SCPE_IOERR;
}
uptr->pos = uptr->pos + 1;
return SCPE_OK;
}