Softcard III: Problems using .RS232, .PRINTER and CP/M

Softcard III: Problems using .RS232, .PRINTER and CP/M

Both the .RS232 and .PRINTER drivers were designed to use the built in serial
port (Port C) on the Apple III.  If one configures the CP/M system such that
both of these drivers are active and assigned to logical devices, the first
attempt to send or receive characters causes the system to crash with an
inverse S D (System Death) displayed on the console.  Reboot your system to
recover.

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