MC6800 cannot interface to Hyperterminal
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Author:  zulnabli [ Tue Sep 24, 2013 6:26 pm ]
Post subject:  MC6800 cannot interface to Hyperterminal


i have problem why my MC68K cannot interface to Rs232 and cannot use Hyperterminal
i use MC68681 and MAX232
please help me find how to Fix this Problem ...

20130925_021312.jpg [ 250.05 KiB | Viewed 12572 times ]
Hyperterminal.png [ 34.17 KiB | Viewed 12572 times ]

Author:  profkelly [ Thu Sep 26, 2013 9:41 pm ]
Post subject:  Re: MC6800 cannot interface to Hyperterminal

Have you tried to connect to it with EASy68K and the Dumbterm program?

Author:  clive [ Fri Nov 08, 2013 9:39 pm ]
Post subject:  Re: MC68000 cannot interface to Hyperterminal

RS232 interfacing can be difficult.

Make sure you know the RX and TX pins on your connectors. Use a scope, check it, and confirm baud rates. Ideally have code that can send a continuous stream of characters. 'U' being a particularly good pattern.

Know your cables, understand the connectors on both ends, if the cable is straight-through, or cross-over. Understand if your gender-changer or null-modem adapters is straight-through, or cross-over.

Check if you need flow control (CTS/RTS or DTR/DSR) at either end.

In the late 80's we had a device called an Interfaker that allow signals to be probed and patched, because every manufacturer had their own connectors, quirks, and implementations of serial interfaces.

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