Re: Second Sight and TW GS

[Erik GACHOT <erik.gachot@vbo.mts.dec.com>]

Paul Schultz wrote:
> 
> On Sun, 21 Jul 1996, Erick Dietrich wrote:
> 
> > What kind of SCSI card do you have?  I have a TWGS rom 1.5 and I can't use
> > the RamFAST I bought, because it dosen't like the 1A chip on the TWGS.  My
> > Apple HS works fine, though.
> >
> I had similar problems when I got my SS (Although I don't own a TWGS).
> I have a ZipGS, RamFAST, and SS. When installed together my IIgs would
> crash. Installing any two of the three would allow my IIgs to run
> stably. The consensus here on csa2 was that I had too much line noise
> running through my system. The cure was to replace the power supply
> leads running to the motherboard with 12 or 14 guage wire. Also, I ran
> wire from the GND connector on the slots 1, 3, 7 to the GND connector
> on the motherboard's power connector. This did the trick (although I
> can only run my ZipGS at 9 MHz instead of 12 MHz).
> 
> An alternative to this course of action may be to invest in a "Buggie
> power supply". I don't have one (yet) but these power supplies may
> have reduced line noise and may cure your problems.
> 
> Good luck,
> 
> Paul.
> 
> pschultz@med.wayne.edu
> Paul Schultz

	After receiving my SS video Card, one year ago, I get the following
	problem:

--------------------------------------------------------------------
	I have a RAMfast REV D, ROM Rev 3.01b Cache 256. Serial 
	Number of the Card is #5581 (On the Card I have U6, U15,
	U17).
	Attached on the Card I have :

		ID4: CD Sony
		ID1: HD 100 Mg (Off Line)
		ID0: HD 100 Mg ( 2 Prodos Partition and 1 HFS).

	When I start-up the GS I hear that the HD is 'activated'
	for a very short time, but I get on the Screen 
	"Unable to Load Prodos". I also tried to boot the GS and 
	pressing the 0 key, but I still get "Unable to load Prodos".

	If I started from a Floppy. The IIgs boot and when I'm
	on the Finder the CVtechROM is on the Desktop. But I can't
	access the RAMfast Menu. By launching the applic.
	And One time I get a 'RAMFAST-SCSI Fatal Memory Fault
	code = 0C'.

	Is there a compatibility problem with my RAMfast. Should I
	upgrade it ?.
-----------------------------------------------------------------------

	I get the following answer from Jawaid:

------------------------------------------------------------------------

> 	Did you see my entry or mails conerning a problem
> 	'Big problem' with a SS.
> 
> 	I think that there are some compatibilities pb with
> 	TWGS, SS and RamFAST?
> 
> 	As if I use the SS without the TWGS. all is ok
> 	if I use the SS without the RamFAST all is also ok.

  Use wire clippers to cut off the capacitor that is soldered to
the gold edge connector on the back of the Second Sight board. 
Be careful to clip the leads very short, so you do not inadvertantly
cause a cross-connection on other pins.

  Removing this capacitor should resolve your problem. 

-- 
 Jawaid Bazyar              |   Like UNIX? Like your Apple IIGS? Then ask
 Procyon, Inc.              |   me about GNO/ME for the Apple IIgs!   
 bazyar@hypermall.com       |   P.O Box 620334    (Sequential: 303-666-4549)
 --The Future is Now!--     |   Littleton, CO 80162-0334   (303) 781-3273

  BTW, take care not to remove the blue wire that is also soldered
to the edge connector - the blue wire must be attached there
for proper modification.

-- 
 Jawaid Bazyar              |   Like UNIX? Like your Apple IIGS? Then ask
 Procyon, Inc.              |   me about GNO/ME for the Apple IIgs!   
 bazyar@hypermall.com       |   P.O Box 620334    (Sequential: 303-666-4549)
 --The Future is Now!--     |   Littleton, CO 80162-0334   (303) 781-3273

---------------------------------------------------------------------------


	I have done this modif and now all is working ok. 


		-Erik Gachot.