minimig AGA v1.2 for the MiST board released

There is a new release of minimig-AGA for the MiST board available, grab it on the minimig-mist page!

While the CPU is still not as stable as I’d like, the latest bitfield fixes by Till Harbaum fixed a lot of games and demos that didn’t work properly before. The OSD Turbo option is not needed or recommended for games or demos anymore, but could still be used for a little speed up in Workbench or programs. F11 key was fixed – when HRTmon is enabled, the F11 key enters the monitor program, when it is disabled, the F11 key acts as a normal Amiga HELP key. There is a CD32Pad option in the OSD, but I didn’t have time to fix the CD32 joypad emulation, so the option doesn’t have any effect for now. Initial support for programmable display modes (productivity modes, like 640x480x60Hz) is available in this core, but there are still some problems with them – some pixels are missing on the right edge of screen, and lowres sprites (mouse pointer) seem to have some problems – You can switch to hires pointer to get around this problem.

The planned ethernet support will unfortunately have to wait till the next release.

Please report any bugs or problems here: (if you have a Github account)
– or – (no account needed)

Here are all of the updates made in this release:

  • initial implementation of programmable display modes
  • OSD HRTmon enable / disable switch is working (ON – F11 acts as NMI and enters HRTmon, OFF – F11 is HELP key)
  • proper handling of CPU access to chipRAM & custom regs – CPU waits for free slot when turbo option is disabled
  • fixed playfield 2 color lut offset when playfield 2 has priority for OCS/ECS modes
  • some IRQ changes
  • added support for undocumented Agnus / Denise behaviour when BPL=7 in ECS/OCS mode (fixes demos like SushiBoyz by Ghostown, Sliced&Diced by Dekadence, etc)
  • blitter line mode fixed (fixes demos like SushiBoyz & Sunglasses by Ghostown, Vectorize by RSi, etc)
  • bitfield instructions fixed, barrel shifter implemented by Till Harbaum
  • fixed colortable for sprites (bplxor) – fixes Alien Breed 3D (and probably many others)
  • fixed keyboard rate
  • kickstart ROM is also uploaded to mirror position (E0)
  • fixed reset problems & fastRAM disappearing
  • added CPU CACR cache control, fixed reading CACR reg
  • added scanlines for non-doublescaned config
  • fixed video dithering – both spatial & random dithering weren’t working properly