Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!mcsun!hp4nl!rulway.LeidenUniv.nl!rulcvx.LeidenUniv.nl!breemen From: breemen@rulcvx.LeidenUniv.nl (E. van Breemen) Newsgroups: comp.sys.amiga.hardware Subject: Re: 14 Mhz Hack Message-ID: <1991May13.081500.7980@rulway.LeidenUniv.nl> Date: 13 May 91 08:15:00 GMT References: <1991May10.104421.22314@rulway.LeidenUniv.nl> Sender: root@rulway.LeidenUniv.nl (System PRIVILEGED Account) Organization: Leiden University, the Netherlands. Lines: 40 Nntp-Posting-Host: rulcvx.leidenuniv.nl In article billc@cryo.UUCP (William J. Coldwell) writes: >Not as easy as it looks, eh? Seems that CMI had the right idea after all, >and even had an FPU plus a software toggle. PA's only have 8 chips and >could access most ROMs at 14MHz. They have probably used PALS for reducing the number of chips and protecting their board against copying. >>Currently I am converting the board into a SMD version, which will be >>published. >> >>Erwin van Breemen >> >>BTW To the designers: don't publish your board before it works 100%. It >>will avoid a lot of anger and disappointment. > >Why? Seems to me that there is too much competition with resale PAs >dropping in price, and ICD's being a hair more than new PAs. 14MHz >68Ks were a great thing 3 years ago, but with 020's and 030 prices >dropping like flies it makes more sense to do a Lucas/Francis type >accelerator for the 500 (IMHO). This is true, but the 14 Mhz hack will provide the needed experience to build a reliable 68020/68030 board. The Lucas/Francis boards are not reliable. You have to experiment with LS/F logic to make things work. And I don't know how the boards will perform in a heavy DMA enviroment. >Speaking from my experience, the accelerated 68K market is d.e.a.d. Commercially spoken yes, but for people who don't have enought money, say $500, it can be interesting. Erwin. PS. I have received several requests for publishing the board. I have already said before, that I will publish it when it is ready in a SMD print version (2 or 3 months).