#: 6456 S7/Telecommunications
    01-Sep-90  13:48:50
Sb: #6453-#T3 troubles
Fm: Bill Dickhaus 70325,523
To: Floyd Resler 72500,2572 (X)

Floyd,

Is the T3 you included in your boot file from the original system config disk?
If so, then its set up to use the MODPAK driver with a serial interface
addressed at $FF68 (like a standard T2 device.) MODPAK was written for the
modempak, will work with any 6551 serial port, but is limited to 300 baud.

If you want to use a second serial interface addressed at $FF6C (like a
modified RS232 pak) then use the M1 descriptor, which uses ACIAPAK. The other
option is M2, which uses MODPAK and a serial port addressed at $FF6C, the
standard modempak address. To summarize, the four Tandy serial device
descriptors are:

 device   address   driver

   T2      $FF68    ACIAPAK
   T3      $FF68    MODPAK
   M1      $FF6C    ACIAPAK
   M2      $FF6C    MODPAK

These names are not an OS9 standard, however, and have been implemented in
different ways by different software and hardware vendors.

Bill

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