rc05@GTE.COM (Ramesh Chandak) (08/26/89)
I am trying to understand the various Macintosh terms related to its configuration. They are : socketed DIP PMMU NuBus ADB Standard SIMM mounted chip can anyone explain in little bit of detail what these various terms mean ? Thanx in advance.
adam@mit-amt.MEDIA.MIT.EDU (Adam Glass) (08/26/89)
rc05@GTE.COM (Ramesh Chandak) writes: > [Gimme definitions for:] > socketed DIP > PMMU > NuBus > ADB Standard > SIMM mounted chip socketed DIP: socketed simply means that the chip is sitting in a socket, rather than being soldered into the board itself, thereby making removal easier (not easy - easier). DIP simply means dual-inline-package, or in other words, two rows of pins -- a chip with two rows of pins (the most common type). The 68020, '030, '881, '882, and '851 are all "square chips" (as I call them). They are not DIPs (no pun intended). PMMU: Paged Memory Management Unit - allows the mac to do virtual memory, aux, and other neat-o things. Replaces the apple MMU (take off the Paged) - has all the functions of the Apple MMU, and the ones for paged memory (virtual and aux). NuBus: Developed by TI as a self-configuring bus. That's what the cards in mac II*'s fit in. The SE's have a "half slot." Perhaps someone who knows the hardware side of the mac better than I could give a better description of half-slot and nubus (I'm not in a capitalizing mood). ADB Standard: Apple Desktop Bus. You've got me as to what the standard part means, though I guess the pinout is a new standard in and of itself which accessory manufacturers must conform to for compatibility/ functionality. SIMM mounted chip: Usually RAM (though nowadays also ROM) chip(s) mounted on a standard SIMM (single inline memory module) board, which fits into the RAM (and nowadays ROM) slots to hold memory (or ROM). Any more questions? I hope I've been of service... Adam -- "What?! He didn't fall? Inconceivable!" (email: adam@media-lab.media.mit.edu) "You keep using that word... I do not think it means what you think it means." (All stolen quotes taken from The Princess Bride) Hmm... 18 spaces left. Moof!