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The Macintosh IIsi was a midrange model from late 1990 meant to go up against PC clones in business environments. But some of the compromises that its engineers had to make to hit its price point meant for some very interesting quirks. Branchus Creations: and BlueSCSI: MeowTOAST: Hakko FR-301 desoldering iron (affiliate link): Sources: MacUser, December 1990. “Can new Macs restore shine to Apple's future?,“ Computerworld, December 24, 1990. IIsi NuBus adapter card photo: IIsi NuBus adapter card scan: DayStar dual-socket PDS and cache card riser photo: “Mac IIsi,“ Macworld, December 1990. 00:00 - Introduction 01:52 - Disassembly 03:08 - Recapping the PSU 05:33 - Completely pointless soldering montage 06:04 - PSU surface-mount caps 06:30 - Tanta-lizing motherboard repair 08:23 - Quirks and features, part 1 08:59 - It blew up! (Not really.) 09:37 - Further testing 10:31 - BlueSCSI version 2 11:52 - Tidying up 12:51 - Uh oh 14:51 - Quirks and features, part 2 17:17 - One-slot wonder ----------------------------------------------------------------------------- Please consider supporting my work on Patreon: Follow me on Twitter and Instagram! @thisdoesnotcomp ----------------------------------------------------------------------------- Music by Soundstripe () and Epidemic Sound (). Intro music by BoxCat Games ().
