Re: RAMFAST REV. B 256K SCSI: info needed

[seanlynch <seanlynch@delphi.com>]

stephen e buggie <buggie@argo.unm.edu> 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