evans@mhuxt.UUCP (crandall) (07/09/85)
Apple's approval of the hyperdrive mentions the clip mount version of that product. Does anyone have any info on what that means -- do they have some sort of clip that attaches to the logic board without soldering? Steve Crandall ihnp4!mhuxt!evans
cjn@calmasd.UUCP (Cheryl Nemeth) (07/11/85)
When did apple approve the Hyperdrive? Is this now the official hard disk for the Mac?
vishniac@wanginst.UUCP (Ephraim Vishniac) (07/15/85)
> Apple's approval of the hyperdrive mentions the clip mount version of > that product. Does anyone have any info on what that means -- do they > have some sort of clip that attaches to the logic board without > soldering? > > Steve Crandall > ihnp4!mhuxt!evans Yes. The clip fits over the 68000 chip. My understanding is that the original 68000 chip is electrically disabled (so that it doesn't get *very hot* under the clip). Presumably, another 68000 on the piggyback board substitutes for it. I have not seen the new model Hyperdrive, but I have seen the clip and discussed its application. -- Ephraim Vishniac [apollo, bbncca, cadmus, decvax, harvard, linus, masscomp]!wanginst!vishniac vishniac%Wang-Inst@Csnet-Relay
werner@ut-ngp.UTEXAS (Werner Uhrig) (07/16/85)
"the clip" is what made HyperDrive acceptable to Apple, I suspect. whereas before, GCC removed the 68000 from the digital board (and did some other things giving Jobs nightmares), now that is no longer necessary, as now "the clip" simply is attached to the 68000, making contact to all the pins. BUT: there still is TOO MUCH HEAT generated by all that additional hardware inside the case, so I am eagerly looking forward to seeing what one can hook up to the "any-day-now" external hook-ups to the internal bus. my recommendation: get a 1 or 2 Meg upgrade, a fan, and look forward to an external connector to the internal bus.
vishniac@wanginst.UUCP (Ephraim Vishniac) (07/17/85)
> > Apple's approval of the hyperdrive mentions the clip mount version of > > that product. Does anyone have any info on what that means -- do they > > have some sort of clip that attaches to the logic board without > > soldering? > > > Yes. The clip fits over the 68000 chip. My understanding is that the > original 68000 chip is electrically disabled (so that it doesn't get > *very hot* under the clip). Presumably, another 68000 on the piggyback > board substitutes for it. > > I have not seen the new model Hyperdrive, but I have seen the clip and > discussed its application. > > Ephraim Vishniac I stand corrected (by two GCC employees). The clip version of Hyperdrive does not disable the original CPU chip, and they do not have any problem with heat dissipation. Even with the clip, etc., the CPU chip remains at least as cool as in an unmodified Mac (I'm told). -- Ephraim Vishniac [apollo, bbncca, cadmus, decvax, harvard, linus, masscomp]!wanginst!vishniac vishniac%Wang-Inst@Csnet-Relay
dws@tolerant.UUCP (Dave W. Smith) (07/19/85)
> Yes. The clip fits over the 68000 chip. My understanding is that the > original 68000 chip is electrically disabled (so that it doesn't get > *very hot* under the clip). Presumably, another 68000 on the piggyback > board substitutes for it. My understanding is that the clip merely extends the bus. -- David W. Smith {ucbvax}!tolerant!dws Tolerant Systems, Inc. 408/946-5667
vishniac@wanginst.UUCP (Ephraim Vishniac) (07/22/85)
> > > Apple's approval of the hyperdrive mentions the clip mount version of > > > that product. Does anyone have any info on what that means... > > > > > Yes. The clip fits over the 68000 chip. My understanding is that the > > original 68000 chip is electrically disabled (so that it doesn't get > > *very hot* under the clip). Presumably, another 68000 on the piggyback > > board substitutes for it. > > I stand corrected (by two GCC employees). The clip version of Hyperdrive > does not disable the original CPU chip... Make that *three* GCC employees. Can't slip anything past those guys. -- Ephraim Vishniac [apollo, bbncca, cadmus, decvax, harvard, linus, masscomp]!wanginst!vishniac vishniac%Wang-Inst@Csnet-Relay