So, I took the pictures from http://www.planetvb.com/modules/hardware/?type=vue&sec=flash_rom_pcb of the official FlashROM cart and made an “X-ray” image with the two halves overlaid.
I was examining it and, based on the pinouts I have, it looks like /INTCRO (the interrupt line, pin 9) is connected to the Flash chips’ A18 😕 (Note: I’m only assuming it goes to the same pin, but it obviously goes to both chips.)
No matter how I look at it, I can’t figure out how I’m seeing it wrong. It also looks like the “audio pass-though” pins are messed up. Could it be a different pinout from the “production” model VB?
I’ve attached some images: Top, bottom, an enhanced “x-ray” version showing the problem I’m having, and the pinout from the Flash data-sheet.
