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#112821 - 03/07/18 10:45 AM Apple II+ Serial Loopback Issue  
Joined: Mar 2018
Posts: 4
John Newcombe Offline
Member
John Newcombe  Offline
Member

Joined: Mar 2018
Posts: 4
Skipton, UK
Many thanks for the warm welcome.

I am a MAME newbie who is using MAME to emulate an Apple II+ with a Super Serial Card in slot 2 configured for loopback (-sl2 ssc -sl2:ssc:ssc_rs232 loopback). I was expecting this to return all characters that were sent to the serial port, however, this isn't happening.

If is use a -bitbanger e.g. (-sl2 ssc -sl2:ssc:ssc_rs232 null_modem -bitbanger output.txt, or sl2 ssc -sl2:ssc:ssc_rs232 null_modem -bitbanger socket.127.0.0.1:2023) everything works a treat with, in the latter case, full bi-directional comms.

The full command line I am using is as follows;

./mame64 apple2p -noreadconfig -skip_gameinfo -verbose -window -nomax -sl2 ssc -sl2:ssc:ssc_rs232 loopback -sl3 videoterm -sl4 applicard -flop1 ../TestDisk.po

The sl2 Verbose output is as follows;

...
Starting Apple II Slot ':sl2'
Starting Apple Super Serial Card ':sl2:ssc'
Starting MOS 6551 ACIA ':sl2:ssc:ssc_acia'
Starting Clock ':sl2:ssc:ssc_acia:clock'
Starting RS232 Port ':sl2:ssc:ssc_rs232'
Starting RS232 Loopback ':sl2:ssc:ssc_rs232:loopback'
...

I see no errors reported in the verbose output, what am I missing or misunderstanding?

Last edited by John Newcombe; 03/07/18 10:59 AM.
#112822 - 03/07/18 12:23 PM Re: Apple II+ Serial Loopback Issue [Re: John Newcombe]  
Joined: Mar 2001
Posts: 15,954
R. Belmont Offline
R. Belmont  Offline

Very Senior Member

Joined: Mar 2001
Posts: 15,954
USA
Do no characters come through the loopback at all, or just certain ones?

#112823 - 03/07/18 05:16 PM Re: Apple II+ Serial Loopback Issue [Re: R. Belmont]  
Joined: Mar 2018
Posts: 4
John Newcombe Offline
Member
John Newcombe  Offline
Member

Joined: Mar 2018
Posts: 4
Skipton, UK
No characters at all.


Moderated by  R. Belmont 

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