From plummer@hercules.cs.uregina.ca Sat Jan 30 16:19:31 1993 Received: from hercules.cs.uregina.ca by toadflax.cs.ucdavis.edu (4.1/UCD.CS.2.0) id AA01753; Sat, 30 Jan 93 16:18:56 PST Received: by hercules.cs.uregina.ca (5.61/1.34) id AA17994; Sat, 30 Jan 93 18:16:43 -0600 Date: Sat, 30 Jan 93 18:16:43 -0600 From: plummer@hercules.cs.uregina.ca (Dave Plummer) Message-Id: <9301310016.AA17994@hercules.cs.uregina.ca> To: announce@cs.ucdavis.edu Status: RO PRESS RELEASE [FOR IMMEDIATE RELEASE] JANUARY 29, 1993 FROM: David Plummer, President SILICON PRAIRIE SOFTWARE RE : HyperCache Professional v1.01 Now Available (Upgrade information follows for v1.0 owners) HyperCache Professional is a filesystem and device accelerator for the Amiga series of personal computers. It greatly improves the performance of all AmigaDOS compatible storage devices, including hard drives, floppies, CD-ROMs, optical floppies, and removable SCSI devices. Performance increases of up to 2200% are attainable via HyperCache's intelligent sector caching algorithms, and its ability to anticipate the demands placed upon the storage devices attached to your Amiga. In fact, its fast enough to accelerate some RAM disks! >From a technical standpoint, HyperCache Pro is an "N-way associative look-ahead line cache system" for any block-accessible device. It employs a method of cache preservation based on the LRU algorithm, which is normally used on mini- and mainframe computers for high-performance virtual memory systems. HyperCache also provides a configurable sector prefetch that can increase performance even when data is read for the first time. HyperCache can provide these benefits on all Amiga models. It is compatible with all KickStart versions 1.2 through 3.0, and works well with the new DCFS system and IDE controllers. It is compatible with Commodore and third- party SCSI, ST-506, XT-IDE, AT-IDE, and several other interface technologies. 512K RAM is required, although 1M is recommended. Filesystem performance on a HyperCache-equipped A500 can exceed that of a stock A3000, while sustained read speeds for the A4000 can jump to more than 5 megabytes per second. Owners of the new IDE equipped systems will appreciate the workstation-like performance not normally attainable with the restrictive IDE controllers. While HyperCache provides unmatched benefits for BBS operators, developers, and video professionals, even the novice user will appreciate the speed with which windows open and reopen, programs load, and file operations take place. HyperCache provides these benefits through both the Shell and Workbench interfaces. CHANGES IN VERSION 1.01 - The data-transfer algorithm has been completely re-written, providing an average speed increase of 37% over version 1.00 - The caching system has been optimized for use with OFS, FFS, and MSDOS filesystems in particular. - New cache summary information, such as device information. - A new utility (HCSummary) is included to provide information on all currently active instanced of HyperCache on the system. - The sector preservation algorithm has been improved to provide a better overall hit ratio, thus giving higher performance. UPGRADE AND ORDER INFORMATION HyperCache Professional can be purchased directly from Silicon Prairie Software. Suggested retail price is $49.95 US, but if you state on your order that you saw this offer via electronic distribution, you can obtain it at the special offer price of $39.95 US. This price includes all shipping, handling, and applicable taxes in North America (Overseas orders please add $3.00, which includes air-mail delivery). To receive your copy, send your check or money-order for $39.95 in US funds to the address below. Remember that postal rates to Canada are slightly higher, so please use sufficient postage to avoid delays. Owners of version 1.00 can obtain the upgrade free by returning their distribution diskette along with $4.00 US shipping. SILICON PRAIRIE SOFTWARE 2326 Francis Street Regina, SK S4N 2P7 Canada (306) 352-0358 Internet: plummer@hercules.cs.uregina.ca