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MEGA65: add cartridge support #380

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lgblgblgb opened this issue Jul 28, 2023 · 1 comment
Open

MEGA65: add cartridge support #380

lgblgblgb opened this issue Jul 28, 2023 · 1 comment
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target:MEGA65 Waiting for real-machine info

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lgblgblgb commented Jul 28, 2023 •
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MEGA65-core is planning to have its native cartridge support. So far, the limited support for C64 cartridges would not make too much sense for MEGA65 to support, as for being an emulator, a proper C64 emulator for that purpose is a much better choice. However with having the possibility of native cartridges for MEGA65, the situation is already different.

https://mega65.atlassian.net/wiki/spaces/MEGA65/pages/36962324/MEGA65+Style+Cartridge+Work+in+Progress

MEGA65/mega65-rom-public#62

The Commodore "standard" .CRT format may need to be extended for some MEGA65 support. Current CRT format:

https://vice-emu.sourceforge.io/vice_17.html#SEC429

However, at this point, if CRT is supported (because of its future MEGA65 features), why not support standard C64 cartridges as well.
@lgblgblgb lgblgblgb self-assigned this Jul 28, 2023
lgblgblgb added a commit that referenced this issue Jul 28, 2023
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MEGA65: the start of cartridge support #380
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lgblgblgb commented Aug 8, 2023 •
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Partial (?) support of MEGA65 cartridge autoboot is implemented in ROM version 920385 it seems: https://github.com/MEGA65/mega65-rom/releases/tag/v920385

Testing that ROM in Xemu (currently using branch next commit f16e0ae) shows, that it basically works, having the binary cartridge attached, on reset or power-on, the cartridge (mandelbrot explorer, native MEGA65 cartridge example) starts.

lgblgblgb added a commit that referenced this issue Feb 13, 2024
@lgblgblgb
MEGA65: allow OPL work on slow-dev space, too #380
4c0a711 
Note, currently I don't know why the slow device space is used for OPL
why not the native I/O space, or the MEGA65 specific OPL regs
at $FE000xx which is intended for that very purpose!

btoschi on Discord has great success to make OPL working on MEGA65 but
requires this access mode, so this quick hack is intended to serve that
holy purpose :)
lgblgblgb added a commit that referenced this issue Mar 15, 2024
@lgblgblgb
MEGA65: allow OPL work on slow-dev space, too #380
6a71a49 
Note, currently I don't know why the slow device space is used for OPL
why not the native I/O space, or the MEGA65 specific OPL regs
at $FE000xx which is intended for that very purpose!

btoschi on Discord has great success to make OPL working on MEGA65 but
requires this access mode, so this quick hack is intended to serve that
holy purpose :)
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