re lc ram upgrade will be slow douce tfsquad mn org andrew geweke writes i cannot speak for dale but i am quite sure that the macintosh uses the full bit or bit data path to its full advantage that is it is running as fast with two or four pin simms as it would with one pin simm now it may be that longword accesses assuming a bit data path here get the first byte from the first simm the second byte from the second and so on this would mean that each longword of memory is actually split among four simms one for each byte on the other hand it could be that the simms are interleaved by word or longword not just by byte or they could be successive in memory and the memory controller deals with the eight bit data path that each one has i suspect though that they are interleaved to some extent so that bits can be read or written at once this would indicate a byte level interleave i am not confusing this with the new machines longword interleave with two pin simms of the same sort although that seems to be the same sort of idea there you get an essential bit data path ro excuse me to ram instead of just a bit one yes the cpu can t handle it but when writing to successive addresses it speeds something up so dale am i right pin simms are interleaved by bytes allowing the full data bus or as is common with usenet and me in particular am i as clueless as everyone else what conclusion can be drawn from this i m trying to figure out what kind of memory configuration for the lc iii bit datapath would be fastest any ideas thanks jason macdonald jason scott macdonald jsm cornell edu jsm crux cit cornell edu technology sufficiently advanced is indistinguishable from magic cats exist so that we arthur c clarke may caress the lion
