This terminal program uses the 4-wire communications protocol I developed to communicate with the 65C02 SBC-1. Connections are made between the PC's parallel port and the SBC's 6522/6526 IO adapter.
The pin connections for the cable are as follows:
Parallel Port (DB25)       Function           6522 Port (Pin)
  DB0 (2)                     Tx Data ->               PB0 (10)
  INIT (16)                   Tx Clk ->                 PB1 (11)
  BSY (11)               <- Rx Data                   PB2 (12)
  ACK (10)             <- Rx Clk                     PB3 (13)
  GND (25)                 Ground                     Gnd
Supported function keys are as follows:
F2 - Clear the screen
F3 - Send ASCII file (feed as if typed in from PC keyboard)
F4 - Capture to text file (for saving SBC output)
F9 - Toggle White text on blue/Black text on white
F10 - Exit Program
Operation is simple and straight forward. Also, timeout values on most loops are included to limit terminal lockups. See the Download Section for a copy of the program!
Here's a screen dump of my SBC with its Help menu displayed: