Agnus 318069-03 aka 8372(A)B

[GregBR]

Hi to all,

I'm looking for an Agnus 318069-03 aka 8372B or 8372AB in perfect working condition.
Thank you in advance for your help...

Greg

 

[GregBR]

Still needed...

Thanks,
Greg

 

[GregBR]

An old 3000 is still waiting for it... :roll:

 

[BLTCON0]

You can alternatively get a 318069-18 Agnus.
Remove the PAL/NTSC jumper and "jumper" pins 1-2 (i.e. the NTSC position) with a 0.1 uF capacitor.
You lose hardware PAL/NTSC switching (will always powerup in PAL mode) but otherwise it's the same and still soft-switchable between PAL/NTSC timings if that's something that interests you.

EDIT: R203 should also be removed (see posts below)

 

[GregBR]

Thank you for your answer BLTCON0!

I already have a -18 Agnus and a 0.1uF cap here... but I do not despair of finding an "original" Agnus to stay "roots".
Otherwise, and to be complete, you do not mention that it is mandatory to remove R203...

Regards,
Greg

 

[BLTCON0]

You're right, R203 should be removed too!

I don't have an A3000 so seeing a 3-pin PAL/NTSC jumper I thought it was wired like:

pin2 --> pin41 of Agnus
pin3 --> +5v through R203
pin1 --> GND

so in 1-2 mode, pin41 would be grounded (force NTSC) and in 2-3 mode it would be pulled high (force PAL).
This would be the reasonable way for a 3-pin jumper block, at least

But I checked the schematics and it's wired like

pin1 --> pin41 of Agnus AND +5v through R203
pin2 --> GND
pin3 --> nothing

so, obviously 2-3 mode is just a "jumper parking" position and R203 must be removed.