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replace keyboard controller HD6301V1P OF3. Atari 520STFM

The place to ask all those likely daft questions!
Wes_T
Posts: 9
Joined: 26 May 2025 21:50
Location: Portsmouth UK

replace keyboard controller HD6301V1P OF3. Atari 520STFM

Post by 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?
20250618_194126.jpg
Screenshot_20250618-202517_Samsung Internet.jpg
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Best regards
Wes_T

/ ZX 81 16kB / ZX Spectrum 16kB / ZX Spectrum 48kB / Atari 800XL / Atari 65XE / Atari 520 STFM / Commodore VIC20 / Commodore C16 / Commodore C64 / Amiga 1200 /
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mikro
Posts: 825
Joined: 28 Aug 2017 23:22
Location: Kosice, Slovakia

Re: replace keyboard controller HD6301V1P OF3. Atari 520STFM

Post by mikro »

There's no "firmware" built-in, the HD6301 code is uploaded by TOS upon boot.
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Wes_T
Posts: 9
Joined: 26 May 2025 21:50
Location: Portsmouth UK

Re: replace keyboard controller HD6301V1P OF3. Atari 520STFM

Post by Wes_T »

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

/ ZX 81 16kB / ZX Spectrum 16kB / ZX Spectrum 48kB / Atari 800XL / Atari 65XE / Atari 520 STFM / Commodore VIC20 / Commodore C16 / Commodore C64 / Amiga 1200 /
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ijor
Posts: 833
Joined: 30 Nov 2018 20:45

Re: replace keyboard controller HD6301V1P OF3. Atari 520STFM

Post by ijor »

mikro wrote: 18 Jun 2025 21:10 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.
http://github.com/ijor/fx68k 68000 cycle exact FPGA core
FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
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mikro
Posts: 825
Joined: 28 Aug 2017 23:22
Location: Kosice, Slovakia

Re: replace keyboard controller HD6301V1P OF3. Atari 520STFM

Post by mikro »

Ah, right. I have mixed up these two, thanks for clarification.
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Wes_T
Posts: 9
Joined: 26 May 2025 21:50
Location: Portsmouth UK

Re: replace keyboard controller HD6301V1P OF3. Atari 520STFM

Post by Wes_T »

Thank you. Lucky keyboard is working on old controler.
Best regards
Wes_T

/ ZX 81 16kB / ZX Spectrum 16kB / ZX Spectrum 48kB / Atari 800XL / Atari 65XE / Atari 520 STFM / Commodore VIC20 / Commodore C16 / Commodore C64 / Amiga 1200 /
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