search

mist-devel / mist-board

Core sources and tools for the MIST board
444 stars 81 forks source link

is the HT1080Z working? #135

Open rampa069 opened 4 years ago

rampa069 commented 4 years ago

Hi. i think he HT1080Z is not working. i have the rom in the SD root folder but after starting it i only get "@" in the screen. (Also resintetized but same result)

also tried the rbf from http://joco.homeserver.hu/fpga/mist_ht1080z_en.html with the same result :-(

gyurco commented 4 years ago

I have no idea, it works for me.

rampa069 commented 4 years ago

and the rom place is in the root folder, isnt it?

gyurco commented 4 years ago

Yes, if you don't have any rom= lines in your mist.ini. Fsck your SD Card.

harbaum commented 4 years ago

That would also be my recommendation. Use a freshly formatted sd card and put only the core (renamed to core.rbf) and the ROM into the cards root directory. Nothing else.

rampa069 commented 4 years ago

tried all. The problem i think are the new sdram timings. something similar happened to SNES core. Is working with older SDRAM chips.

gyurco commented 4 years ago

The SDRAM is clocked only @42Mhz, and the controller is not particularly different than in any other 8 bit core. Are Colecovision/C16/C64/ZX81...etc are working? SNES is a very different beast, running the SDRAM @128Mhz, without any NOP cycles.

gyurco commented 4 years ago

Ok, maybe this one: change the "set_locaton_assignment PLL_1 ...." in the .qsf to:


set_location_assignment PLL_1 -to clkmgr|altpll_component|auto_generated|pll1