Making a start on 5200 support. GTIA needs to expose full consol output for this. So far just removed chips from custom top level and made address decoder adjustments.
Added reset to noise filter (helps for sim), fixed inversion on poly5.
Remove inversion
Match more closely to schematic - delay/inversion
noise delay between channels. Apply force break to two tone.
It is important when we sample and when we toggle. Fixes "clarinet".
Changes for Aeon lite - notably 1MB ram support and ise build warnings fixed
Merged aeon lite 1MB memory support
Fixed length
switch to signed samples - which replay and sigma delta want!
Added generic for Aeon_lite. vars need setting up though.
Fixed throttle...
Mix covox and gtia as if they were pokey channels. Increase precision to allow 8-bit covox channels. Its not clear how gtia and covox really clip with pokey channels - that would need research. For now this improves volume.
Added option for OSB internally
Not 100% sure why but this change from a while ago breaks the mist and de1 sdram versions. Need to investigate futher but reverting for now.
Use F5-F8 for Help,start,select,option. Use F1-F4 for F1-F4!
Fix memory_data_in missing from sensitivity list
Make more resilient to slow ram accesses. Needs more work/testcases etc for this really.
Antic refresh always takes one original cycle - this fixes turbo mode up to 4x on mcc
Added fkeys
Connect up snoop to allow ZPU to see the data it requested
Always complete sram request if we have no sram
No need for mmu to deal with refresh at all
Add an additional internal rom option - internal_rom=2, which for now just loops reading/writing 4 bytes. e.g. for testing new RAM setups
Pass through video bigs
Added video bits to generic, since I am having to adjust this everywhere.
to_01 silenced sim, but caused build issues. If its invalid use 0.
Pass through some PBI signals needed for SDRAM
Expose pots, lightpen. Fix joystick bit ordering comments.
added ps2_keys_reg to sensitivity list (was missing)
Split ROM into its own process, to make it easier for Quartus to infer
Renamed poly_* to pokey_poly_* since it is part of pokey
Cleaned up ZPU into slightly more generic form, though still clearly atari core targetted. Added inital tb, though needs rom to verify more. MIST sector side removed, but should be possible with external changes. Now ZPU instead has lots of GPIO.
Allow palette selection - with one option GTIA direct to allow external scandouble (with less memory)
Compiled/ran helloworld in sim. Appears fine...
First cut at simple toplevel for the atari800xl - needs checking with isim...
Make these generic to support Replay (28MHz) and the rest (57MHz)
Current unmerged vhdl for my Atari800 core and start at merging them into one tree with a common core