You may want one for a spare. Firmware Upgrades - A complete upgrade kit is NOT available. If you do not have the computer interface board, you will not be able to upgrade past V3.42. V3.5, 3.6, 3.7 and 3.8 all require the computer interface board which is not available. If you do not have them but have everything else you need for V3.8, two of the 27C011 eprom emulator boards can be used.
Shipping is additional.
Repairs 85's 96's 850's, DVR's and FC900's. I took years ago a good pal from an RC-85 and hooked a dip sw to it's input. By running data into the PAL I came up with this design for the 74LS138. Take 4 short pieces of wire wrap wire and strip the ends back. You should now have 4 wires sticking up into the air from the socket.