TIFILES Ç9P ╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩S╩SGEmail5Item 7747642 94/05/05 23:20 7From: BW.MILLER Beery W. Miller 7To: BW.MILLER Beery W. Miller3 COMP.SYS.TI.USENET@GATEKEEPER.DEC.COM@INET# Sub: To: Markus Kraemer JMarkus, here are the mods to the Rave Speech card and the MBP that permitsKfull decoding of those cards to work with the Geneve. Any Geneve using oneDof those cards without these mods are subject to PROBLEMS, PROBLEMS, PROBLEMS. 4The mods for the Geneve compatibility is as follows: ISolder pins 8 and pins 16 of a 74LS138 to pins 8 and 16 of 74LS138 on theJ card (this is for +5 volts and ground only, you may use another source if& available), i.e. piggyback the chips. KNow for the decoding mod that properly decodes the Rave Speech card and theK MBP card for full Geneve Compatibility (these devices will only respond at
page >BC) :Cut the trace of pin 56 on the card near the bus connector Pins of 74LS138 ? _____________________________________________________________- 1 Connect to bus pin 46 2 Connect to bus pin 45 3 Connect to bus pin 48$ 4 Connect to bus side of bus pin 56 5 Connect to bus pin 8 6 Connect to bus pin 9 * 7 Connect to component side of bus pin 56 8 Connect to pin 8 of 74LS138 16 Connect to pin 16 of 74LS138 )(pins 9 through 15 are left disconnected) LThese modifications are done at your own risk. You assume all responsibilty $ for performing these modifications. =END=
