SOP-28 (EEP)ROM chips on the underside of the main Brainstorm board, presumably containing supplemental ROM code.

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1. Keith Kaisershot (blitter@mastodon.social)'s status on Wednesday, 31-Jan-2024 04:43:03 JST Keith Kaisershot

   in reply to

   I beeped out the two chips on the underside and I strongly suspect they are ROMs, possibly even EEPROMs, based on the pinout. They seem to match the pinout of the 27C512 chips used by the Mac Plus ROMs, albeit in a SOP-28 package. The first troubleshooting step I'd like to try is to dump the contents of these ROMs, but alas I don't have anything that fits an SOP-28 footprint ( @tubetime ?). Likewise I'd like to dump the Plus ROMs just to verify their expected contents.