paulg@tplrd.tpl.oz.au (Paul Gittings) (06/20/91)
Looking at the pinouts of the A500 expansion edge connector and the A2000 CPU slot, there does not seem to be very much difference between the two (mainly an extra clock signal on the A2000). How different are they really? With the appropriate connectors what are the chances of an A2000 CPU style card (say the GVP Power board) working on the A500. I've ordered the A500/A2000 Technical reference manual but it will take over a week to get here and I'm an impatient sort of person so that is why I'm posting. As an aside the A500/A2000 Technical Reference manual is going to cost me AUS$127.63 (through SIBNET in Sydney) even though C= RRP is only AUS$90, and the last time I checked the US price was US$45. When the RKM (1.3) manuals first came out some dealers (eg CompuSpot in Sydney) were selling them for four times the US price, the price now seems to have settled at twice the US price, total cost of the set around AUS$180. Now with the release of 2.0 we get to do it all again. I realise for developers or working people like myself that this is not that great of a cost (besides it's tax deductible :-) but what about the kids who write those demo programs everybody seems to be picking apart lately. If to learn how to write programs that follow all the rules you have to shell out $180 what is the average high school kid going to do ... Cheers, Paul Gittings - Telectronics Pacing Systems - Lane Cove, NSW 2066, Australia ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _ | paulg@tplrd.tpl.oz.au | What's a Welsh/Canadian _ // Amiga users | 61-2-4136963 (voice: work) | doing in Oz? Looking for \X/ make it happen | 61-2-4136868 (fax) | the Wizard of course! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ No matter how much I beg, Telectronics will not allow me to express any opinions on its behalf.
daveh@cbmvax.commodore.com (Dave Haynie) (06/27/91)
In article <1991Jun19.231808.7291@tplrd.tpl.oz.au> paulg@tplrd.tpl.oz.au (Paul Gittings) writes: >Looking at the pinouts of the A500 expansion edge connector and the >A2000 CPU slot, there does not seem to be very much difference between the >two (mainly an extra clock signal on the A2000). And the coprocessor interface protocol. That's essentially unnecessary if you don't have additional DMA devices, and absolutely necessary if you do. If you run the BGACK* line of a coprocessor card to +5V, and the BOSS* line of the coprocessor card to BGACK* of the A500/A1000 edge, and of course make sure the 68000 and coprocessor are the only two possible bus masters in the system, then all you usually have to do is worry about the 7MHz clock. -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "This is my mistake. Let me make it good." -R.E.M.