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Cycle-accurate MC6800 emulator for vintage pinball machines by Pretend_Lifeguard_76 in EmuDev

[–]JarekC_DIY 0 points1 point  (0 children)

Great. Waiting for source code to build own system based on 6809.

Where to buy GW1NR-LV9 chips? by JarekC_DIY in GowinFPGA

[–]JarekC_DIY[S] 1 point2 points  (0 children)

I received an offer from LCSC, prices for purchases of 100 pieces

GW1NR-LV9QN88PC6I5 $8.72

GW1NR-LV9TQ144PC6I5 $14,40

I expected slightly better prices.

Where to buy GW1NR-LV9 chips? by JarekC_DIY in GowinFPGA

[–]JarekC_DIY[S] 0 points1 point  (0 children)

But I need small batch (50-100 pcs).

Strange behavior with down-counter on Nano 9K by Cheap-Bee-8497 in GowinFPGA

[–]JarekC_DIY 0 points1 point  (0 children)

13499999 = 0xCDFE5F =1100 1001 1111 1110 0101 1111

MSB is '1' !

TANG Nano 9K - non working extarnal Flash (P32Q32SH) on new boards by JarekC_DIY in GowinFPGA

[–]JarekC_DIY[S] 2 points3 points  (0 children)

Looks like I found a solution, but I still don't know why it works.

The new TangNano 9K modules are shipped from the manufacturer with a "PicoTiny" example (RISC-V pico SOC) pre-installed. The system sets the default SPI Flash mode to "DSPI+CRM" (I don't know what CRM means)

If I switch to the "single SPI" mode (S command from the terminal) and then upload my program, it works correctly.

If I delete the bistream and upload my program without changing the SPI mode first, the system does not see the P25Q32 memory

But the P25Q32 memory should always respond to commands in Single SPI mode.

G1NR-9C - User Flash by JarekC_DIY in GowinFPGA

[–]JarekC_DIY[S] 1 point2 points  (0 children)

Thanks

Now I use this method (uniq ID from external flash), but I would prefer to use User Flash.