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SDS: Simplify MT operation check.

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The SDS tape unit can't do write reverse (no magtape tape can, afaik).
So instead of testing for a particular write subop, the code just tests
that the write was done in BCD mode.
This is closer to how the hardware works.
This commit is contained in:
Bob Supnik
2018-05-23 15:49:25 -07:00
committed by Mark Pizzolato
parent a429739622
commit 59067579dd
1 changed files with 3 additions and 3 deletions
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6
SDS/sds_mt.c
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@@ -428,9 +428,9 @@ if (dev & DEV_MTS) { /* erase? */
st = sim_tape_errecr (uptr, mt_bptr); st = sim_tape_errecr (uptr, mt_bptr);
else st = sim_tape_errecf (uptr, mt_bptr); /* no, forward */ else st = sim_tape_errecf (uptr, mt_bptr); /* no, forward */
} }
else { else { /* can't be reverse */
if ((mt_bptr == 1) && (mtxb[0] == 017) && /* wr eof? */ if ((mt_bptr == 1) && (mtxb[0] == 017) && /* 1 char BCD write */
((mt_inst & 01670) == 00050)) (!(mt_inst & CHC_BIN))) /* of 017B? */
st = sim_tape_wrtmk (uptr); /* write tape mark */ st = sim_tape_wrtmk (uptr); /* write tape mark */
else st = sim_tape_wrrecf (uptr, mtxb, mt_bptr); /* write record */ else st = sim_tape_wrrecf (uptr, mtxb, mt_bptr); /* write record */
} }