RS232 <=> RS422

I've got some equipment here that has RS422 serial on it - i.e. it uses differential signal pairs rather than RS232's reference against ground. Question is, can I wire up a cable so that I can use an RS232 terminal with this RS422 equipment? (running over a short distance) Looking at the schematics, I think it's possible, with signals mapping to: RS422 RS232 RXD- GND RXD+ RX TXD- no connection? TXD+ TX CTS- GND CTS+ CTS BSY- no connection BSY+ RTS ... but I don't know if I should ground TXD-, or indeed one web site I saw suggested that TXD- should be used as the signal and TXD+ is actually the reference. I suspect that one or other should be left floating and the other pin of the pair forms the 'real' TXD in RS232-speak. Obviously I need to swap signals for communications to work (RX -> TX, TX -> RX etc.) :-) CTS- and BUSY- aren't actually brought out to the comms port on the equipment at all; CTS- is currently jumpered to ground internally, and BUSY- is left floating and brought to a test point on the PCB. RXD- is also currently jumpered to ground, which suggests that I can indeed connect TX on the RS232 terminal to RXD+ on the equipment and expect that side of things to work - I'm just not sure what I need to do with the TXD+/TXD- signal pair (which one actually connects to RX on the terminal end) (the actual comms chip is a 6551A, then the receiver for RXD and CTS is a 26LS32 and the driver for TXD and BSY is 26LS30) cheers Jules