GBA flashcart abnormal behavior in NDS

Hi,
I designed myself a GBA flashcart.

I'm using EPM3064 cpld as mapper chip.
I tried code https://github.com/laqieer/opencartgba
Also designed myself a vhdl code using this reference schematic:
https://www.brolinembedded.se/projects/ ... matics.gif

Both fails in NDS console.

I'm using a sram (as6c1008) design.
I'm using flashrom (s29GL256)
I'm also using TPS3619 Battery backup supervisor IC.

Its a pretty simple design.

In my GBA-SP it plays OK, saves OK, can't complain.

The issue is with my NDS lite.
I like playing retro game with it for its bright screen.
But it have a abnormal behavior, the game stall, freeze and outputs weird noises.

Here is a demo.
https://youtu.be/MqoyJeJQ_zY?si=u7XxOUUkRnC-xeqw
Any idea what may cause this?

Statistics: Posted by mightydidz — Sat Mar 09, 2024 9:51 am — Replies 2 — Views 122

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