Ruud Baltissen wrote: > Hallo allemaal, > > The text. Please, enjoy. I'l return to the @#$#@! decoding of my signals for > the PC-card :) *gasp* So it wasn't my alarm clock which ran at 1 or 2MHz afterall. Chapeau!, allthough I probably don't have computer which is fast enough for all this :-/ [snip] > As you probably noticed, I mentioned the ISA-bus. What about VLB or PCI? VLB > is outdated and rare. For PCI you need special chipsets, connectors and more > advanced tools to create a card. The card must be etched, handwiring is > because of the involved speeds out of the question. This project must be > kept in reach of hobbyists. > > ### is above true about special chipset? Well, the PCI protocol is well defined, but not as easy to implement as the ISA bus. The *simplest* implementation I saw used an FPGA to do the actual interfacing to the PCI bus. PCI is defininately not a Geek Port. [snip] > But disabling the hardware interrupt does not mean we are unable to do > anything else with the PC. The PC can poll the Keyboard-interrupt once a > while to see if the user wants its attention. If that is the case, it is up > to the programmer to decide what happens in that case. > One thing is clear: forget Windows :) > > #### Linux ???? I think you can safely rule out *any* multitasking system. It introduces latencies and delays which are clearly unacceptible. > IMHO we can emulate a lot of carts, ranging from some "only EPROM" to more > sophisticated as the Final Cartridge III or the CP/M-cart for the C64. And > maybe, repeat maybe, we can emulate the SCPU. What about that? :) > > ### the 20 MHz worries me a little bit. A faster machine probably could > handle it. But faster machines often have no ISA-bus anymore. Especially for > this reason I would be happy if somebody could think of another interface > which still is "available" for the common hobbyist. Well, PCI would be the ultimate goal - but it's not "available for the common hobbyist" - the smallest problem being the rather tight layout of the PCI-connector. Considering that ISA is a 'depricated' feature, emulating a SuperCPU will not be easy. -- Martijn van Buul - Pino@dohd.org - http://www.stack.nl/~martijnb/ Geek code: G-- - Visit OuterSpace: mud.stack.nl 3333 Kees J. Bot: The sum of CPU power and user brain power is a constant. - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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