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luvwagn

Posted Fri Feb 10, 2023 3:13 pm

JackTheKnife, isn't it JP100 right next to the label and the single hole?

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JackTheKnife

Posted Sat Feb 11, 2023 11:48 am

luvwagn wrote:
Fri Feb 10, 2023 3:13 pm
JackTheKnife, isn't it JP100 right next to the label and the single hole?
Correct. Also, I was thinking to get PAL/NTSC as a switch rather than a jumper. Currently, I'm running A1000 set to PAL.

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luvwagn

Posted Sat Feb 18, 2023 10:51 pm

Can I populate as 2mb but use a 1mb 8372a agnus?

Given how scarce the 8372b agnus is, I'm wondering about a board spin to either:
a) use modern cheaper ram, 1mb, and support 8372 only, -or-
b) use modern cheaper ram, 2mb, and support 8375 directly (no adapter)

But if the board can be populated with 2mb, and use either 8372 or 8375 (via adapter), I'd leave it that way (except possibly cost reducing the ram)

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McTrinsic

Posted Sun Feb 19, 2023 1:29 am

Fantomen wrote:
Mon Jan 31, 2022 12:22 pm
Image
Fantastic, indeed.

You don’t happen to have one surplus? I am desperately looking for one such device for some time to get my Phoenixboard-Diva up and running again.

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luvwagn

Posted Tue Feb 28, 2023 12:48 pm

luvwagn wrote:
Sat Feb 18, 2023 10:51 pm
Can I populate as 2mb but use a 1mb 8372a agnus?

Given how scarce the 8372b agnus is, I'm wondering about a board spin to either:
a) use modern cheaper ram, 1mb, and support 8372 only, -or-
b) use modern cheaper ram, 2mb, and support 8375 directly (no adapter)

But if the board can be populated with 2mb, and use either 8372 or 8375 (via adapter), I'd leave it that way (except possibly cost reducing the ram)
Still wondering about the above?

Also, wondering what the behaviour is if dropping a PAL Agnus into the design? Obviously won't get PAL output over the composite or rf ports etc, but what about via the Denise chip and RGB2HDMI - ends up 50Hz? Wouldn't crystals and other stuff have to be changed too?

I may have goofed and bought a bunch of wrong Agnus chips from Europe :( Luckily I have a handful of NTSC Agnus chips coming as well.
Last edited by luvwagn on Wed Mar 01, 2023 1:12 am, edited 1 time in total.

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McTrinsic

Posted Tue Feb 28, 2023 1:23 pm

Welling one of them is an Angnus 2MB PAL I can help you relieve the pain 😊

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luvwagn

Posted Sat Mar 04, 2023 2:47 pm

Christmas came early
20230304_134324.jpg

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McTrinsic

Posted Sat Mar 04, 2023 3:12 pm

Those are 1MB ECS types of Agnus, right?

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intric8
Seattle, WA, USA

Posted Sat Mar 04, 2023 3:56 pm

The 8372A chip is the ECS 1MB Agnus.

Aren't all those 8375 318069-10 chips the 2MB PAL Agnus meant for the A500+ and/or A600?

I think someone was hoping to build an adapter some day so those chips could be used with the Rejuve at some stage. . . Definitely easier to find in 2023 than the A3000 Agnus, that's for sure.

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luvwagn

Posted Sat Mar 04, 2023 6:03 pm

3x 2mb pal agnus (use via adapter, I sourced one and may make more)
1x 2mb pal a3000 style agnus (use on rejuvenator)
1x 1mb pal/ntsc agnus (?)

I also have 3x ntsc 2mb agnus incoming.

This is to populate the 5x rejuvenator PCBs I procured.

My goal is to redo the rejuvenator by EOY to directly use 8375 parts, and a common SOJ 2MB RAM part. Will be a pain to solder, not as easy as the current through hole boards...





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