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Home▸ Forums▸ 68kMLA▸ Duo 2300c/180 MHz 603e QFP Graft/Hack . . . — #8
Post #8 by Trash80toHP_Mini
Source Forum68kMLA
CategoryTroubleshooting
Post DateWed, 13 Apr 2011 - 03:07
Original URLhttps://68kmla.org/bb/threads/duo-2300c-180-mhz-603e-qfp-graft-hack.22821/
Post
Yep! It's the same PBX Bridged '030 PDS/slow side I/O bus, common to the Duos, 1400s and 5300s. So the Docking Connector only has access to the slow side of the I/O bus, whereas the Cache and unbridged PDS Slots were on the fast side along with the Memory Controller, RAM, CACHE, etc.

You really have to move the CPU lines to the Modem Compartment and adapt them to the 1400 Mobo Connectors to stick a CrescendoPB in there . . .

. . . to which DR. Bob over on 'fritter replied was no mean feat, as the fast side is running at 100MHz . . . :-/

However he'd scoffed at the entire notion until I posted the DevNote Block Diagrams, side by side and color coded, to show the few differences between the 1400 and the 2300c. The gang over there shouted him down, so he gave me a crash course on why fooling around with the 100MHz section wasn't child's play.

At which point I decided to cheat . . . by moving PBX to the mountain and . . . whatever . . . :o)

< edited . . . murk reduction attempt >

Installing the T-Rex/PCMCIA Card Cage from a 1400 is likely to be a much more simple hack. I'm Certain the UltraDock's cavernous sub-basement was designed to enclose this assembly, running off the Duo's Docking Connector.