lphillips@lpami.wimsey.bc.ca (Larry Phillips) (11/12/90)
In <45608@eerie.acsu.Buffalo.EDU>, v089pfrb@ubvmsb.cc.buffalo.edu (Jeffrey C Murphy) writes: >Does any know where I might find some empty circuit boards that will >fit into the A2000's 100 pin slot and also some that will fit into the >CPU slot? If so what is the cost per board? I got one from NES in Oregon (Bill Seymour should be able to give you the address.. I can't find it). It is a Zorro board with connectors for the IBM slots as well. It cost me about $50. -larry -- The only things to survive a nuclear war will be cockroaches and IBM PCs. +-----------------------------------------------------------------------+ | // Larry Phillips | | \X/ lphillips@lpami.wimsey.bc.ca -or- uunet!van-bc!lpami!lphillips | | COMPUSERVE: 76703,4322 -or- 76703.4322@compuserve.com | +-----------------------------------------------------------------------+
v089pfrb@ubvmsb.cc.buffalo.edu (Jeffrey C Murphy) (11/12/90)
Does any know where I might find some empty circuit boards that will fit into the A2000's 100 pin slot and also some that will fit into the CPU slot? If so what is the cost per board? Please respond by EMail... Thanx Jeff
lphillips@lpami.wimsey.bc.ca (Larry Phillips) (11/20/90)
In <11738@hubcap.clemson.edu>, dawill@hubcap.clemson.edu (david williams) writes: >In article <2218@lpami.wimsey.bc.ca>, lphillips@lpami.wimsey.bc.ca (Larry Phillips) writes: >> In <45608@eerie.acsu.Buffalo.EDU>, v089pfrb@ubvmsb.cc.buffalo.edu (Jeffrey C Murphy) writes: >> >Does any know where I might find some empty circuit boards that will >> >fit into the A2000's 100 pin slot and also some that will fit into the >> >CPU slot? If so what is the cost per board? >> >> I got one from NES in Oregon (Bill Seymour should be able to give you the >> address.. I can't find it). It is a Zorro board with connectors for the IBM >> slots as well. It cost me about $50. >> >> -larry > > Does anyone manufacture one of these with built-in autoconfig and >decode logic? I used to have one of these (on an older computer) that >made prototyping a breeze - just use the existing decode and interface >logic, and plug in your new stuff. IVS had a prototyping board that included autoconfig logic, but I don't know if they still do or not. I didn't get one because they would not release any information about their circuit or PAL equations. This made it (to me) totally worthless, since modifications to fit whatever I wanted to do would have taken a fair bit of time with a logic analyzer to figure out. Oh well. > On the other hand, how do you build an autoconfig block? I've read >the A2000/A500 technical reference manual discussion on this, but I >don't have a PAL burner. They give equations for these suckers, which >leaves me out in the cold. I suppose I could look at the equations and >figure out just what is going on, but I don't have that much time. I'm afraid there isn't much else to do but to figure it all out. Basically, the PALs provide two necessary things, one being timing signals for the Zorro bus, and the other being actual config information. If you don't have a PAL burner, you can generate timing signals in the traditional manner (gates, flipflops, etc.), and put the autoconfig information in a ROM. It takes a little figuring, but it isn't all that difficult. The other alternative, of course, is to have PALs burned for you, with your modifications included, if appropriate. -larry -- The only things to survive a nuclear war will be cockroaches and IBM PCs. +-----------------------------------------------------------------------+ | // Larry Phillips | | \X/ lphillips@lpami.wimsey.bc.ca -or- uunet!van-bc!lpami!lphillips | | COMPUSERVE: 76703,4322 -or- 76703.4322@compuserve.com | +-----------------------------------------------------------------------+
dawill@hubcap.clemson.edu (david williams) (11/20/90)
In article <2218@lpami.wimsey.bc.ca>, lphillips@lpami.wimsey.bc.ca (Larry Phillips) writes: > In <45608@eerie.acsu.Buffalo.EDU>, v089pfrb@ubvmsb.cc.buffalo.edu (Jeffrey C Murphy) writes: > >Does any know where I might find some empty circuit boards that will > >fit into the A2000's 100 pin slot and also some that will fit into the > >CPU slot? If so what is the cost per board? > > I got one from NES in Oregon (Bill Seymour should be able to give you the > address.. I can't find it). It is a Zorro board with connectors for the IBM > slots as well. It cost me about $50. > > -larry Does anyone manufacture one of these with built-in autoconfig and decode logic? I used to have one of these (on an older computer) that made prototyping a breeze - just use the existing decode and interface logic, and plug in your new stuff. On the other hand, how do you build an autoconfig block? I've read the A2000/A500 technical reference manual discussion on this, but I don't have a PAL burner. They give equations for these suckers, which leaves me out in the cold. I suppose I could look at the equations and figure out just what is going on, but I don't have that much time. Ideas, comments? Dave Williams dawill@hubcap.cmemson.edu "Huh? What? Could you repeat the question?"
billsey@agora.uucp (Bill Seymour) (11/29/90)
In article <11738@hubcap.clemson.edu> dawill@hubcap.clemson.edu (david williams) writes: :In article <2218@lpami.wimsey.bc.ca>, lphillips@lpami.wimsey.bc.ca (Larry Phillips) writes: :: In <45608@eerie.acsu.Buffalo.EDU>, v089pfrb@ubvmsb.cc.buffalo.edu (Jeffrey C Murphy) writes: :: >Does any know where I might find some empty circuit boards that will :: >fit into the A2000's 100 pin slot and also some that will fit into the :: >CPU slot? If so what is the cost per board? :: :: I got one from NES in Oregon (Bill Seymour should be able to give you the :: address.. I can't find it). It is a Zorro board with connectors for the IBM :: slots as well. It cost me about $50. :: :: -larry : : Does anyone manufacture one of these with built-in autoconfig and :decode logic? I used to have one of these (on an older computer) that :made prototyping a breeze - just use the existing decode and interface :logic, and plug in your new stuff. There was a company that made one with one type of autoconfig design on the board, but I don't know if they're still available or not. : On the other hand, how do you build an autoconfig block? I've read :the A2000/A500 technical reference manual discussion on this, but I :don't have a PAL burner. They give equations for these suckers, which :leaves me out in the cold. I suppose I could look at the equations and :figure out just what is going on, but I don't have that much time. You can always substitute a PROM for the PAL. Autoconfig is just a set of address reads followed by a write. You still have to do the 521/374 thing, but the bulk of the PAL stuff could be put in a small EPROM easily enough. A PAL is just cheaper... And on our designs, we've tended to put pretty much the whole thing into a bigger PAL. That's the main problem I've had with doing a board with autoconfig hardwired in, you still have to burn a PAL or PROM, and you're much more limited on what else you can do with that part. I hate to waste any PAL functionality just because I needed part of it for the autoconfig. :-) : Ideas, comments? : : Dave Williams : dawill@hubcap.cmemson.edu : "Huh? What? Could you repeat the question?" -- -Bill Seymour billsey@agora ***** American People/Link Amiga Zone Hardware Specialist NES*BILL ***** Bejed, Inc. NES, Inc. Northwest Amiga Group At Home Sometimes (503) 281-8153 (503) 246-9311 (503) 656-7393 BBS (503) 640-0842