A Moogle  🏳️‍🌈 💻 🎮 🎶 🇸🇪

wish I were brain normal enough to work on something for a sustained period of time and be cool and finish it me: I want to work on MAME Driver X you know how much I like reverse engineering hardware also me: hmm, I don’t own an X to compare it to and X costs $5,000 on eBay

Wait doesn’t MAME’s Atari ST emulation still not work, like at all @TheMogMiner I have many STs and much 68000 knowledge don’t I

The main sticking point with ST emulation, as far as I know, is a lack of a cycle-interruptible 68k core, which is something @o_galibert has been working on, albeit glacially.

That said, to my knowledge, cracked games generally work fine-ish.

That also said, that mid-instruction-interruptible 68k core is going to be necessary for emulating the DTACK line. More broadly, that includes some 68k-based Macs and all of the CD-i players that used an MCU dubbed 'SLAVE' (Philips's term, not mine) for I/O.

I'm confused. Holding DTACK/ unasserted (high) doesn't interrupt the program, it just prevents the memory cycle from completing until DTACK/ is asserted (low). It's like WAIT on other processors. Why would you need an instruction-interruptible core to emulate that?