Subject: Re: [stella] Stella 2.0 Alpha 3 available From: "atari2600" <atari2600@xxxxxxxxxxxxx> Date: Sun, 3 Jul 2005 23:39:17 -0400 |
I don't have a testbed binary handy (I'm still on holiday in the USA), but the information in that post about the 3E format was mostly correct. The only glaring error I can see is that switching in a ROM bank via write to 3F actually switches in a 2K ROM bank, not 1K. The 2K area occupies the same address space as the read and the write areas of the 1K RAM bank similarly switched in by a 3E write. To write to RAM, write to address+$400. Cheers A -------Original Message------- > From: "B. Watson" <atari@xxxxxxxxxxxxxx> > Subject: Re: [stella] Stella 2.0 Alpha 3 available > Sent: 03 Jul 2005 20:27:13 > > On Sun, 3 Jul 2005, atari2600 wrote: > > > I would like to check this out on Boulder Dash (R) -- but I'm > > wondering... does Stella handle 3E bankswitching? > > Apparently not: there's no Cartridge3E class and no mention of the string > "3E" in the source anywhere. > > If you can point me to a web page or something with a good description > of the 3E scheme, I'll (attempt to) add support for it. Actually I > found your original post about it: > > http://www.biglist.com/lists/stella/archives/200505/msg00128.html > > There may be enough information there... Though it'd be nice to have at > least one ROM image that uses 3E, so I can test my code. Apparently you > can't just send me your binary for copyright reasons, but maybe early > on in your work you wrote a test ROM that just switches banks and does > something like display different colors in the different banks...? > > Also, you'll probably have to generate your own stella.pro entry for > your binaries: I don't know if I'll be able to auto-detect 3E mode. > > -- > B. > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ > Unsub & more at http://stella.biglist.com -------Original Message------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://stella.biglist.com
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