MiSTer FPGA Forum

You are free to improve this core. I've ported this core to MiSTer, but have no much interest in Atari ST in general. So developer who is ST fan would be good. I have one more question. Do you plan to continue to port changes from MiST core or at least fix issues of the current code (I noticed not all memory configurations do work and Viking outpu...

The SDRAM is definitely fine. A 4MB mode does work. I found this undocumented info in the mister FW source code st_tos.h: // (currently 4MB are fixed and cannot be changed) #define TOS_MEMCONFIG_512K (0<<1) // not yet supported #define TOS_MEMCONFIG_1M (1<<1) // not yet supported #define TOS_MEMCONFIG_2M (2<<1) // not yet supported #define TOS_MEMC...

There seems to be a problem with a (ST/E) hardware init during coldboot in the current Atari ST core. It usually won't start at first try (black screen) and does not react to either reset or cold start from OSD. I have to cycle between (ST/STE/MegaSTE/STEROIDS) modes randomly and use reset or cold start from OSD multiple times in order to make a pr...

Ok then. I'll try to do something. In fact in meantime I already tried to hack TG68k CPU into core, but didn't pass event the HW init (white screen only). I have to learn all the Quartus, Signal Tap and (system) Verilog stuff first, because I came from VHDL and Xilinx world

i finally have my MiSTer up and working and playing with the ST core. As a huge fan of Atari/TOS machines that I used many years, I'd like to push the core capabilities towards the higher end Atari/TOS machines. Actually, the result should be rather an generic TOS machine, that would have fast CPU, enough RAM, high resolution color, than (cycle) ex...

Definitely.

If that's the case, the 020 and 030 are same instruction set, and unless the OS is doing explicit detection for 030 So there is already an STE core with TG68, available? I only know about experimental TG68 support in MiST core. Anyway, with a STEroids core with TG68/020 there will be a good chance to make a Falcon TOS4.4 work with only a minor cha...

Neither FPU nor MMU is mandatory for most Falcon audio software. The MMU is used only for memory protection in Freemint OS and virtual memory managers for TOS (like Outside). FPU is utilised by some demos and production software.

Main thing about Falcon is the really limited software library. I disagree. There is huge amount of falcon specific software, maily a production one but also demos, players etc.. In addition, the used machines are pretty expensive and there is still not even 100% software emulation available. Anyway, making a proper F030 core would be a challenge....