Hi, Sorry guy's I didn't intend this message to be posted here. Jeri --- Jeri Ellsworth <cm_easy@yahoo.com> wrote: > Thanks for the spec's! I'm going to look them over > in > a few day's. I have to work on some memory bandwith > issues and see how I'm going to handle 1280 mode :( > > Jeri > --- Professor Dredd <profdredd@yahoo.com> wrote: > > Okay Ruud, > > > > --- Ruud Baltissen <Ruud.Baltissen@abp.nl> wrote: > > > If one can reprogram his PC's FLASH-BIOS, it > > cannot > > > be so difficult to add > > > this feature to our new design as well. > > > On the other hand I like the suggested idea of > > > loading the KERNAL in SRAM > > > but not from EPROM but from disk like an OS. > Even > > a > > > combination should be > > > possible. > > > > He're what I had in mind. At power up the entire > > KERNAL is copied from a ROM into RAM. Then patches > > are > > loaded from a special RAM area that is not part of > > the > > main map and is not succeptible to power loss. > > > > The special RAM should be outside the main memory > > map > > in the same way C-128 VDC RAM is. It could be made > > "power-safe" a number of ways like (just off the > top > > of my head": > > battery-backup like in Apple IIgs > > NOVRAM like in modems > > FlashROM like in PC BIOS > > > > That is what I mean by PRAM and I am not sure what > > technology would be best suited for such a design. > > Whatever technology is used, here is the type of > > thing > > the PRAM will be used for: > > custom key matrix > > system clock > > user customizeable KERNAL patches > > > > Another good thing to put there would be system > I/O > > configurations defaults. For instance, what if you > > want to address a second SID chip at $DE00, but > you > > already have Turbo 232 registers mapped there? > > Suppose > > you could map them both there and select between > the > > two with a softswitch? Then, you'll need someplace > > to > > store your user-defined default configuration so > the > > KERNAL can set the softswitches on powerup. > > > > Just an idea. I have no clue how it might be done. > > > > ===== > > Get a FREE 6Mb webmail box from go6502! - > > http://www.geocities.com/profdredd > > > > As low as 2.99% Intro APR from NextCard! - > > http://www.nextcard.com/index6.html?ref=aff0074521 > > > > PayPal is the FAST FREE and SECURE way to send > > money! - > > > https://secure.paypal.x.com/refer/pal=profdredd%40yahoo.com > > > > __________________________________________________ > > Do You Yahoo!? > > Yahoo! Auctions - buy the things you want at great > > prices > > http://auctions.yahoo.com/ > > - > > This message was sent through the cbm-hackers > > mailing list. > > To unsubscribe: echo unsubscribe | mail > cbm-hackers-request@dot.tml.hut.fi. > > > __________________________________________________ > Do You Yahoo!? > Yahoo! Auctions - buy the things you want at great > prices > http://auctions.yahoo.com/ > - > This message was sent through the cbm-hackers > mailing list. > To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi. __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/ - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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