Path: news.uiowa.edu!news.physics.uiowa.edu!math.ohio-state.edu!howland.reston.ans.net!newsfeed.internetmci.com!news-feed.mci.newscorp.com!news.delphi.com!usenet From: seanlynch Newsgroups: comp.sys.apple2 Subject: Re: RAMFAST REV. B 256K SCSI: info needed Date: Wed, 7 Feb 96 13:21:15 -0500 Organization: Delphi (info@delphi.com email, 800-695-4005 voice) Lines: 98 Message-ID: References: <4f61ia$1ke@lynx.unm.edu> NNTP-Posting-Host: bos1b.delphi.com X-To: stephen e buggie stephen e buggie writes: >I just got an early model of RAMFAST SCSI: > >RAMFAST Rev. B, 256K, serial No. 0134. Steve, but I used to own ser.# 0136. My guess would be set DMA off. The old manual lists the zip chip as ecifically list the Chinook card. Section 3 on page three of the manual says: 1) Terminator power- on if the RamFAST will supply termination power to the SCSI bus. Otherwise the drive is assumed to be supplying it. You should only toggle this switch if the RamFAST/SCSI has problems locating some or all of your drives, or if it is acting eratically. 2) ROM Select - This switch should be OFF in an Apple IIgs and ON in an Apple IIe. Period. 3) Machine Type - Off denotes an Apple IIgs(or an enhanced IIe). On signifies you have an unenhanced IIe. If you do turn this switch ON, DMA will be 6% slower than it would be otherwise. 4) DMA Compatability - In an Apple IIgs, this switch is turned ON if you have a non-DMA compatible memory card. If this is the case, DMA wil only occur to and from the memory on the motherboard and it is important that switch #5 also be set correctly. In an Apple IIe, This switch completely enables(OFF) or disables(ON) DMA. If you have a CPU accelerator other than a Transwarp III installour IIe you will need to turn this switch ON. Note: Turning this switch on will drop your performance drastically; you might want to try running without the accelerator. 5) GS Motherboard Type - This switch determines if the motherboard is the older 256k version (switch off) o newer 1 meg version(switch OFF) ******************************************************************* Note this typo in the original manual!!!!!!!! This is what I meant when I said I couldn't answer your question!!!!!!!! I guess you'll have to try both ways! ******************************************************************** If the entire system is DMA compatible (switch 4 is OFF) then this switch is not really used, otherwise it tells RamFAST/SCSI how much of the Apple IIgs memory is DMA compatible (128K.vs. 1Meg). In the Apple IIe the switch is ignored. **************************************************************** Another typo? 128k. or 256k vs. 1meg??? ******************************************************************** 6) RomDISK Disable - Turn this switch ON and the RomDISK will never show up as a drive and it will also not "pop up" when saved configuration data does not match the current configuration. The only real reason for disabling the RomDISK here and not in software using the utility program is if you plan on turning off all of the drives connected to the RamFAST/SCSI and booting 3.5" or 5.25" disks. 7) Drive Search Timeout - Turn this switch ON and the RamFAST/ SCSI wil only spend 3 seconds(instead of 30) trying to find a drive after powerup. Use this if you want to turn off all of the drives connected to the RamFAST/SCSI and still use your computer (booting 3.5" or 5.25" disks) without having to wait the default 30 seconds. Reserved - Must be OFF> I don't think this card is compatible with sys 6, so you might want to try it with an old HD and load sys 5.X on there. try with switch 4 on and experiment with switch 5. Someone else may remember witch setting is correct. Don't play with a hard drive that has anything important on it. My advice would be to use this for a //e but buy a new RamFAST for a IIgs. If you e-mail me your address in NM I'll send you the old manual. (I used to live 77 miles South of Abq. in Socorro) -SeanLynch@Delphi.com