Xref: utzoo comp.sys.mac:45988 comp.sys.ibm.pc:41767 Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!mcsun!sunic!nuug!ulrik!oivindt From: oivindt@ulrik.uio.no (Oivind Toien) Newsgroups: comp.sys.mac,comp.sys.ibm.pc Subject: Re: Help: Softwr to Run DOS on MAC Message-ID: Date: 11 Jan 90 14:48:23 GMT References: <89360.113013REDELMAN@AUVM.BITNET> <1990Jan10.014311.7148@agate.berkeley.edu> Sender: oivindt@ulrik.uio.no (Oivind Toien) Organization: University of Oslo, Norway Lines: 29 In-Reply-To: laba-4ad@web-1c.berkeley.edu's message of 10 Jan 90 01:43:11 GMT In article <1990Jan10.014311.7148@agate.berkeley.edu> laba-4ad@web-1c.berkeley.edu (Joseph Teo) writes: ..... deleted The best and only program so far is SoftPC which provides an excellent emulation on a 68020/30-based Mac ..... deleted... ..The drawbacks are namely speed: on my SE/30, it produces only about 60% the speed of a 4.77Mhz XT clone according to PC Tools and a pathetic 30% according to Norton Speed Index. It only emulates the 8088 (actually the ...... deleted In a test I found that the clock-tick rate (Int $1C) was only about 4.5 Hz which is about 1/4 of what is it should be on a PC (approx. 18Hz). I also tried to reprogram the "timer chip" to test the extent of emulation of the hardware, but the clock-tick rate could not be changed. The test was performed on a Mac SE30 which was temporary at my disposal together with the Soft-PC program. This could have serious implications on the speed of programs using the clock-tick to time events. Oivind -- ================================================================== Oivind Toien, University of Oslo, Norway Phone 47-2-454732 Fax 47-2-454726