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Re: Using an ISA VGA card on an AVR

I've tried to write some bytes at 0xA0000 and 0xB0000 manually and reading them back, which always resulted in 0xFF. that means the memory isnt there, in the sense that ram lines are pulled high when non-existant. I presume the card is doing its own ram refresh... I also assume you meant 0xB8000 …

Re: Using an ISA VGA card on an AVR

Imho it seems like you're taking the difficult route of using libx86emu library, as you'll then need to deal with any incompatibility issues. Instead of relying on the card's bios, the simpler way would be to perform the initialization directly via registers programming and ignore the bios …

Re: Using an ISA VGA card on an AVR

Hi! I'm building this slightly weird contraption to learn more about the ISA bus. I have connected an ISA slot to an Arduino Mega (basically just an AVR microprocessor with a lot of 5V capable I/O pins) and I'm directly writing and reading from an attached ISA card. nice. I've seen MDA cards on avr …

Re: How likely am I to miss the SC-55?

the roms size on 55+88 are small. so samples are small. your not missing out on much if anything. I dont think we need to worry about that 1 game that needs capital tone feedback that only a sc55 with a very specific firmware does. the 88 has more polyphony which is nice... for dos games that use …

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