Cheap TMS99xx replacement

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cheshirenoir
Posts: 286
Joined: Sun Jun 02, 2019 5:17 am

Cheap TMS99xx replacement

Post by cheshirenoir » Sat Jun 08, 2024 2:11 am

Hey Folks,
Over on the TI99/4A Facebook group, someone just posted this video:
https://www.youtube.com/watch?v=Ri09dCjWxGE
Hopefully we'll be able to use this in our systems too!

Chesh
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visrealm
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Joined: Fri Feb 28, 2025 6:41 am

Re: Cheap TMS99xx replacement

Post by visrealm » Sat Mar 01, 2025 12:08 am

Oh! Thanks for posting - this is my mod, the PICO9918.

I recently purchased a Dick Smith Wizzard to try it out on. Works great :)

creativision_pico9918_2.jpg

I have a few more pictures of the install in my Introduction topic: G'day from Adelaide, Australia

Cheers
Troy
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carlsson
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Location: Västerås, Sweden

Re: Cheap TMS99xx replacement

Post by carlsson » Sun Apr 20, 2025 10:28 pm

As you posted on AtariAge, did it require a firmware upgrade on the Pico9918 to work with the Creativision? Perhaps all new chips are sold with the latest firmware anyway.
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visrealm
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Re: Cheap TMS99xx replacement

Post by visrealm » Mon Apr 21, 2025 1:48 am

carlsson wrote: ↑
Sun Apr 20, 2025 10:28 pm
 As you posted on AtariAge, did it require a firmware upgrade on the Pico9918 to work with the Creativision? Perhaps all new chips are sold with the latest firmware anyway.
Yes, there was a slight timing issue when writing to the VDP with older firmware. This was fixed with v0.4.4 which has been shipped on all of my PICO9918's since March 6th 2025 (Serial numbers 0380+).
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