mkh6317@rigel.tamu.edu (HOWARD, MATTHEW KENDALL) (07/10/90)
The latest MacUser reported on accelerators and cache cards for the Macintosh line. Buried in a sidebar was a mention that Apple was developing a 32K cache card for the IIci. Can anyone provide any additional information on this card? Will we be seeing it anytime soon? What is the hit rate for a card of this size? Has anyone reading this tried the 128K cache card from Micron? If so, please take a second and share your impressions of it. Any other "cache card" talk, rumors, or opinions? One thing I've found by benchmarking a DayStar cache card is that it doesn't seem to speed up science and engineering -type programs. For instance MatLab runs about 10% faster and a single precision Whetstone shows little if any improvement. MacUser reported the same. ** So how much to you think a Mac IV/040 will be at consortium prices? **
henry@chinet.chi.il.us (Henry C. Schmitt) (07/12/90)
In article <6475@helios.TAMU.EDU> mkh6317@rigel.tamu.edu writes: > >Has anyone reading this tried the 128K cache card from Micron? If >so, please take a second and share your impressions of it. > I just got the Micron Xceed IIci-128 Cache Card last week. I've only found a few incompatibilities so far, but the cdev included with the card makes it easy to shut it off. As for speedups, as well as doing memory caching it includes an INIT which patches the SANE traps for greater speed at a loss of precision. For a quick comparison using Speedometer: CPU Math Disk Overall SE 20Mb disk: 1.00 1.00 1.00 1.00 "Standard" IIci 40Mb disk: 5.15 9.79 3.42 5.73 My IIci (see below): 6.28 45.57 2.19 13.32 I just ran this test under MultiFinder (6.1b9) from my Removable 45Mb Hard Disk. Both the cache and SANE traps were turned on. As for percision, doing the Savage test with traps on was ~10^11 vs. ~10^-19 with the traps off. Hope this gives you the information you want. -- H3nry C. Schmitt | CompuServe: 72275,1456 (Rarely) | GEnie: H.Schmitt (Occasionally) Royal Inn of Yoruba | UUCP: Henry@chinet.chi.il.us (Best Bet)