------------------------------ Date: Tue, 15 Apr 86 15:06 MST From: Steve Herbst Subject: PC-elevATor Board Results To: Info-IBMPC@USC-ISIB.ARPA I am very impressed with Applied Reasoning's 8MHz PCelevATor accelerator board. Using it and the associated RAMDISK software now in Beta-test, Lattice C compiling is 4.5 times as fast and linking is 7.25 times as fast as an 8086 running at 4.7MHz (mine is a Compaq portable). If you include the time it takes to copy files to and from the RAMDISK drive, the factors are more like 4.1 and 6.4. Here are some actual figures for compiling a large module (about 70K source) and for linking all 175 modules totalling 250K. OPERATION 8086 80286 80286/RAMDISK FACTOR --------- ---- ----- ------------- ------ Compile/1 284 sec 119 sec 70 sec 4 Compile/2 202 sec 55 sec 37 sec 5.5 Link 703 sec 407 sec 97 sec 7.25 I've experienced no problems at all with the board or the software. I bought the version of the board with 2 MB of RAM on it, one for DOS and PC-elevATor software, the other available for RAMDISK, disk cache, print spooler, and "above board" application memory. In addition, the software can access the "downstairs" memory of your old CPU board. Altogether, I am able to create a RAMDISK of about 1350K. One thing to note is that the RAMDISK drive's root directory, like any root directory under DOS, has an upper limit of 150 or so entries. When you try to exceed this number, you get "File not created". Create a subdirectory and put everything in there. PC-elevATor available from: Applied Reasoning Corporation 765 Concord Avenue Cambridge, MA 02138 Contact Rose Robinson 617-492-0700 ------------------------------------------------------------ Date: Wed, 12 Mar 86 18:41:39 EST From: Walter Bender To: info-ibmpc@usc-isib.ARPA Subject: RE: Accelerator Boards and Compaq Portable Cc: blue@MEDIA-LAB.MIT.EDU The PC-elevATor 286 from Applied Reasoning Corp. works in Compaq portables, DeskPros, and even PC-ATs. It comes in 8, 10, and 12.5 MHz models, with optional 5 or 8 MHz 80287 co-processor, and up to 2 MB of no wait-state RAM. Their software includes RAM Disk and EMS / Above Board support. Applied Reasoning Corporation 765 Concord Avenue Cambridge, Mass. 02138 (617) 492-0700 Yr. obt. svt., P.D.Pathe Javelin Software Corp. (blue@media-lab.mit.edu)