2 MB Agnus types for Rejuvenator boards
Agnus (2MB) 8372AB 318069-03 A3000 (PAL/NTSC), A3000T (PALNTSC)
Agnus (2MB) 8375 318069-19 A3000 (NTSC), A3000T (NTSC)
Agnus (2MB) 8375 318069-18 A3000 (PAL), A3000T (PAL)
The 8375 varieties need to have the NTSC/PAL selection jumper OPEN and need to have 0.1microFarad ceramic capacitor soldered between the Agnus facing pin of the NTSC/PAL selection jumper and ground. (That is the official rework from Commodore to use those in the A3000).
The 318069-03 can be defaulted to either NTSC or PAL using the jumper. The 318069-19 defaults to NTSC as the selection pin for NTSC/PAL is not bonded out (and is internally grounded)and that pin is instead used for the base bias voltage generator that the 8375 Agnuses use - which requires the 0.1 microfarad capacitor. The 318069-18 defaults to PAL as the selection pin for NTSC/PAL is not bonded out (and is internally pulled up to +5V) and that pin is instead used for the base bias voltage generator that the 8375 Agnuses use - which requires the 0.1 microfarad capacitor.
You can use the 318069-18 in the US without any problem. It's the same chip as the 318069-19. Only difference is that the Early Startup Menu and booting without Startup-Sequence defaults to PAL (can switch by pressing a key for Early Startup, and run a program from the CLI to switch). Really only a (minor) problem if you have a Microway Flicker Fixer as those are either NTSC or PAL (you won't be able to read while Agnus outputs 50Hz/PAL screen). Screenmode prefs allow you to set the Workbench to NTSC with the -18 and vice versa to PAL with the -19. The NTSC/PAL versions use the same die anyways, all that grounding/pulling up (internally or externally) does is to set the Agnus chip id register to either indicate NTSC or PAL. AmigaOS selects the actually video mode when it initializes the chip. More info.
The only Agnuses that are do not support both NSTC and PAL are the 512k chip mem varieties: 8361/8367 (A1000) and 8370/8371 (A500/A2000 OCS).
Augh! I cannot wait, I'm dying from a lead-in like that!!!intric8 wrote:And holy smoke! Wait till I get a chance to post the pics from our tests tonight. You guys are ALL going to really like what you see.