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Author Topic: Vampire 500 V2+ compatablity with other expansions????  (Read 4198 times)

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Offline psxphill

Re: Vampire 500 V2+ compatablity with other expansions????
« on: March 29, 2017, 06:06:02 PM »
Quote from: Thomas Richter;823955
This is because autoconfig itself is not controlled by the vampire, but by the buster chip on the mainboard.

A500, so there is no buster. CFGIN/CFGOUT don't seem to be handled by buster on the A2000 either, the slots are looped with an 74LS chip to allow empty slots to be skipped. If the vampire prevented access to 0xE80000 then you wouldn't be able to configure the card, it could also prevent access to zorro 2 ram or io space which would allow the card to be detected but not used.
« Last Edit: March 29, 2017, 06:10:55 PM by psxphill »
 

Offline psxphill

Re: Vampire 500 V2+ compatablity with other expansions????
« Reply #1 on: March 30, 2017, 09:53:42 AM »
Quote from: Motormouth;823985
An A2000 with a vampire and a 486 bridgeboard would be kinda awesome.
But a scsi card or 16 bit memory or even an Ethernet card is not quite like the issues a bridgeboard can have.


An A500 with a 486 pc emulation in the vampire FPGA would be awesome too. Although you probably couldn't fit both at the same time.
 

Offline psxphill

Re: Vampire 500 V2+ compatablity with other expansions????
« Reply #2 on: March 31, 2017, 07:17:00 PM »
Quote from: OlafS3;824011
why on earth should anyone reimplement 486er in a Vampire FPGA?


why not?

Quote from: OlafS3;824011
That is even more senseless than reimplementing PPC in FPGA


Emulating a 486dx100 in an fpga would be much more doable than a 300mhz ppc. So less senseless.