11 March 2016 - Forum Rules
Started by LostTemplar, February 14, 2012, 06:11:30 PM
QuoteYou could also change the ROMs on an actual cartridge. By expanding the program ROM and not the data ROM (the game is separated into 1MB program ROM and 4MB data ROM, where the data ROM is behind to SPC7110), it should be able to run on an actual console. Simplified it's just connecting an additional address line to the program ROM to be able to select the upper MB of it. While I didn't try this, byuu said he has the game running in this configuration.
QuoteAs you can see, there was 1MB program ROM mapped to:c0-cf:0000-ffff + 00-0f:8000-fff + 80-8f:8000-fffI added another 1MB like so:40-4f:0000-ffff + 10-1f:8000-ffff + 90-9f:8000-ffff
Quote from: Nightcrawler on March 27, 2012, 11:38:18 AMI would hate to see this not run as intended on original FEOEZ carts
Quote from: byuuThe same way c00000-cfffff maps there now. The decoder chip on the cart can detect that range and select the ROM.Force the A23 input to the address decoder to be permanently high, and now feed A23 into a switch (eg ISL84544) to select between the two 1MB ROM chips -or- invert it and add to address for 2MB ROM chip address bus value.
Quote from: Hiei- on April 12, 2012, 03:07:17 PMOr you mean you already finished the first draft of the whole script ?
Quote from: Tom on April 12, 2012, 10:12:17 AMI sent the script to byuu and Lost Templar, so hacking should begin soon.
Quote from: Gemini on April 01, 2012, 03:43:33 PMTom is hard worker, as always.
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