replace keyboard controller HD6301V1P OF3. Atari 520STFM

[Wes_T]

Hello. Can i replace keyboard controller HD6301V1P OF3 with HD6301V1P 3F1? I think they could have different firmware. Atari 520STFM.
If not? How can i replace it?

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Screenshot_20250618-202517_Samsung Internet.jpg (36.7 KiB) Viewed 158 times

[mikro]

There's no "firmware" built-in, the HD6301 code is uploaded by TOS upon boot.

[Wes_T]

Thats mean i don need to worry about an just replace?
Thank You

[ijor]

There's no "firmware" built-in, the HD6301 code is uploaded by TOS upon boot.

Hmm, no. The HD6301 has ROM "burned" at factory.

It is possible to upload a small amount of code that would run from RAM. Some demos do that. But that has very limited functionality because there is so little RAM space available.

[mikro]

Ah, right. I have mixed up these two, thanks for clarification.

[Wes_T]

Thank you. Lucky keyboard is working on old controler.