Introduction and some porting instructions! NYH-workshop.The github has been updated according to the changes too. Well, at least it's better than nothing! I'm gonna try to get this test error-free in the future. Some of the games that previously didn't work properly had worked after I have fixed the emulator, but the NES test is still reporting that the "Indirect Y" is not wrapping up properly in JMP instruction, and "Indirect X" has a sta6502 not storing data where it is supposed to. So, using the hints and the descriptions from the test, I managed to have the adc6502 and sbc6502 to temporarily ignore the decimal flag (it is not implemented in NES' processor) and then restore the flag state after calling.Īpart from that, the bvs6502 has the addressing mode changed back to the relative6502, according to the 6502's information. Using Kevin Horton's NES test, it is shown that some of the instructions were incorrectly emulated! Worst of all, the "Indirect Y" crashed in this test! I found out why: there are some problems in the 6502 emulator. Pseudo-random colors at the left or right end of the screenĤ.) I am trying to tackle the sound issue - a higher order low pass filter is mandatory if you want don't want to hear squealing from the speakers.ĥ.) The NES classic controller is being polled manually - if the connection isn't too good, the entire game (and the emulator) would stall and crash.Īs said before, some games refused to work with it.No screen shakes (some games have that).I do not have enough knowledge to check what is faulty inside the emulator - this is only a proof of concept testing for the PIC32MZ microcontrollers. And in certain games, the tiles in the screen are garbled. Try games that are limited in only one screen first (no scrolling). I believe it is due to the long delays in setting up the drawing window in the ILI9341.ģ.) Not all games are supported. And yes - it is slower because the screen is using SPI instead of a parallel one.Ģ.) The screen sometimes get garbled between times but it recovers very quickly. It would be a different story if the PIC32MZ runs more than 200MHz though.
#Microcontroller 6502 emulator trial
Then copy it to "ROM.c".ĥ.) PIC32MZ-EF microcontroller with at least 64-pins (PIC32MZ2048EFH064).Ħ.) speaker and a small amplifier (PAM8403)ħ.) 1st order low pass filter (24kHz cutoff - trial and error) Issues:ġ.) The game runs at a relatively lower frame-rate than the actual NES. Get your own game in *.NES file format, and then convert it to a C file using the HxD editor. How to put a game inside?Īs usual, the game are not included. The (2) is there because this is the 2nd try in porting an NES emulator - the 1st try was unsucessful (InfoNES), so the name got stuck there.
#Microcontroller 6502 emulator driver
The NES emulator core is written by the guys in OpenEDV forum: and NES sound driver is by the author named "beaglescout007": This is a basic NES emulator for Chipkit platform with PIC32MZ-EF microcontroller.Ī very limited amount of games are supported - please test this using Mapper 0-based games first.