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TMXR: Properly control and record modem bits on serial lines

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As reported in #877 and #878
This commit is contained in:
Mark Pizzolato 2020-06-13 08:58:38 -07:00
parent 337062fcf0
commit c8389a7bfd
1 changed files with 8 additions and 4 deletions
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12
sim_tmxr.c
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@ -1620,9 +1620,9 @@ if ((lp->modembits != before_modem_bits) && (sim_deb && lp->mp && dptr)) {
sim_debug (TMXR_DBG_MDM, dptr, " - Line %d - %p\n", (int)(lp-lp->mp->ldsc), lp->txb);
}
if (incoming_bits)
*incoming_bits = lp->modembits;
*incoming_bits = (lp->modembits & TMXR_MDM_INCOMING);
if (lp->mp && lp->modem_control) { /* This API ONLY works on modem_control enabled multiplexer lines */
if (bits_to_set | bits_to_clear) { /* Anything to do? */
if ((bits_to_set | bits_to_clear) || incoming_bits) {/* Anything to do? */
if (lp->loopback) {
if ((lp->modembits ^ before_modem_bits) & TMXR_MDM_DTR) { /* DTR changed? */
lp->ser_connect_pending = (lp->modembits & TMXR_MDM_DTR);
@ -1630,8 +1630,12 @@ if (lp->mp && lp->modem_control) { /* This API ONLY works on mo
}
return SCPE_OK;
}
if (lp->serport)
return sim_control_serial (lp->serport, bits_to_set, bits_to_clear, incoming_bits);
if (lp->serport) {
t_stat r = sim_control_serial (lp->serport, bits_to_set, bits_to_clear, incoming_bits);
if (incoming_bits && (r == SCPE_OK))
lp->modembits = (lp->modembits & ~TMXR_MDM_INCOMING) | *incoming_bits;
return r;
}
if ((lp->sock) || (lp->connecting)) {
if ((before_modem_bits & bits_to_clear & TMXR_MDM_DTR) != 0) { /* drop DTR? */
if (lp->sock)