This is all around the tmxr_set_get_modem_bits() API.
This change is non operational, but this clarification would avoid the
mistake made when someone uses or thinks about changing that
API in the future.
The prior change disabled returning DTR and RTS which the documented
interface was quite specific about actively returning.
The only user of this API which actually cared about DTR and RTS was
the in the pdp11_dmc module.
As reported in #951
As reported in #865
When instruction execution is stopped, forced mux output rate limiting
can't leverage instruction execution rate to time inter-character delays.
A direct sleep is used but that has a minimal granularity measured in
milliseconds. The prior default for a non speed controlled line was 10ms
sleep between character output. This has been changed to 1ms which
is reasonable for most situations. Meanwhile, since the remote console
facility uses TMXR, and it has the reasonable ability to generate output
when instructions are not being executed, this is better but not perfect.
Outbound connections are rare and most may have wanted explicit blocking
behavior, so no one noticed the missing non-blocking case.
Any place which did do outbound connects have explicitly added
SIM_SOCK_OPT_BLOCKING so that the prior behavior is preserved.
The SIM_SOCK_OPT_BLOCKING flag is no honored as it was originally
intended to be.
The effect here is to avoid clearing the UNIT_TM_POLL flag for devices which
call tmxr_set_line_unit or tmxr_set_line_output_unit on device reset.
As reported in #646
- Fix ineffective setting of RNG modem bit when line with DTR isn't available
- Fix logic clearing modem signal bits
- Add API to set/clear modem control behavior fo a specific line.
- return -2 status from tmxr_poll_conn when RNG has been enabled
Also:
- Enhance SHOW MUX to support "SHOW MUX <dev>"
- Fix potential null pointer dereference with unusual ATTACH combinations
- Allow BPS factor to change without specifying an explicit speed.
- Provide consistent behavior for connected OR BUFFERED lines
BUFFERED lines can be used with MUX EXPECT/SEND scripting
without an active connection.
- Fix SHOW MUX to display useful info for BUFFERED lines.
