CompuServe Messages

Allan, The jumpers above SW1 enable IRQ3, IRQ4, and IRQ7 for COM2, COM1, and LPT1 respectively. Up above the SW1 switches and the IRQ jumper block is the RS-232C jumper block which has 6 positions for 3 pairs that control DSR, DCD, and CTS in the serial port. The first jumper in each pair will force the condition true thereby disabling it. The second jumper in each pair will enable the flag. The jumpers below the clock battery enable the COM1, COM2, LPT1, LPT2, GAME, and CLOCK ports and/or functions. Since the board has only one serial port, obviously either COM1 or COM2 should be enabled. Of course if you have plenty of serial ports on another card, it may be that you would not want to enable either of them. The same reasoning applies to the parallel port for LPT1 and LPT2. The GAME port may not have the necessary chips to operate since it is labeled as an optional item. Consequently, this is a piece of hardware that you may also wish to order from AST. If you did not get the ribbon cables for the parallel port and the game port, then you also need those if you want to use either or both of those. The serial port is on the AST SixPakPlus card.