h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

Oh, sorry, I've just seen your post saying you've solved your problems. Good news.

MacGee,

I've received excellent help on solving my OS X problems at the MacCentral General Discussions forum.

Suncage has decided he likes it there and has received a warm welcome. He sent me a couple of private messages and if you click on his name, there is a link to his art website.

Donna

This link will be deleted soon, so if you happen to find it before it gets yanked [url]http://maccentral.macworld.com/[/url]

Donna, I don't see why the link would be pulled; it's the third one in the "Useful external sites" list on the main page...

a touch of APPLE paranoia- perhaps!

AppleVision 1710 (SG549.......). Reliable until last month. Remember previous APPLE discussions featuring S Bell et alia prior to my woes. Resolder Deflector board etc. Possibly Transformer. Any remarks before I get out the soldering iron. I'm a capable & experienced amateur, but not a tech. Symptoms- occasional screen flash for month prior then blank screen. At startup green light goes on, electron gun heard to fire. Tried on other working MACS. Not a CPU/card issue. I'm from Australia where it's financially worth fixing if I do the work & it's not the CRT itself(17" $A400+).
Regards hobbit.

My beautiful 1710AV gave up the ghost a couple of months ago with similar symptoms. I found a friendly repairman who diagnosed the PSU had gone. After ringing round he came back to me saying that a new PSU would set me back £200 - then there would be labour on top of that!

Sadly I had to retire the 1710 and bought a new Formac 17" display for only £125. Of course it doesn't have the stereo speakers, but otherwise it's a nice display. Maybe not good enough for graphics pros though.

Wish you luck with your repair - keep us posted on how you get on

I take it PSU is Power Supply Unit, sometimes referred to as the "Fly Transformer"?? I can do the work & I use it for Graphics. Regards.

See if you can download ftp://download02.info.apple.com/Apple_Support_Area/Misc/Service/servicemanuals/applevision_1710av_display.pdf hobbit. You'll probably need to use Fetch rather than a Web browser to do so though.

Cheers

Rod

Yep! Found it last week. Thanks. Got it with I.E. 5.1.5 + Acro Reader 5.0 -no problems at all. I'm just reassembling a friend's VCR that I had no success with & reckon I'll check out the PSU with the ole multimeter & resolder the deflector board to start with. The beauty of the exercise is I've got nothing to lose & a monitor to gain.

FPM (Fast Page Mode) vs EDO (what does it stand for?). 60ns/70ns. Where BEST?
I have 168 pin DIMMs in a 8200/120 {a 7200 in a tower}, {CPU 601} & 2x7300/200's {CPU 604e}.
 Until now (since both need min 70ns ) I have given no consideration to where I placed memory except memory need & interleaved pairs in the 7300 (supposedly to gain some operating speed). The 8200 has acted strangely (incidentally while I've swapped RAM around) at times exhibiting the dead Mac symptoms that fill a proportion of forums ( -> the importance of LIVE battery, zap PRAM; correctly seated RAM, VRAM, daughter boards & cards; CPU, Power Supply connections solid). Finally using CHIPMUNK (c/- APPLE Charlie52761's link) I can decipher my RAM cards. I now know whether they are FPM, EDO and/or 60ns, 70ns.
In CLARIFICATION, is there a correlation between FPM/EDO & 60/70 speed?
In general, is this possibly pertinent to the dead one day / alive the next "middle age Mac" syndrome- since many put in any available 168pin DIMMs to UP grade?
In particular, with MY MACS what preference should I give over FPM, EDO, 60ns, 70ns from now on.
P.S. EDO's seem to work fine in my 7300.

Recieved the info I needed, i.e. no EDO's should go into a 601 chip based CPU. REGARDS ALL.

I'm still puzzled that you mentioned 60ns/70ns in the context of DIMMs; I've always thought of those as SIMM speeds. All my DIMMs are 12ns/10ns/8ns... The main advantage of DIMMs over SIMMs is the higher speeds...

(I think- concerning memory chips) 1985- 150ns soldered memory. 1990 Macs had 120ns SIMMs (30 pin). Macs circa. 1995-6 typically required 80ns SIMMs (72 pin). My vintage of Macs circa. 1997 need a minimum 70 ns DIMM (168 pin) 60ns also OK. Circa 1997-8 needed 60ns DIMMs. Are they at 8ns. Wow! It seems reasonable to 'assume' that SIMMs to DIMMs was architecture change (32 bit to 64 bit data path) resulting in increased speed, but reference to 70ns & 60ns DIMMs is correct for at least 1997-8 Macs. Speed comes by various routes. Rod will correct me if needs be. I'm learning but may never catch up! Come on 1999! Wow- 8ns.
P.S. EDO is Extended Data Out.

http://www.simmtester.com/page/memory/show_memfaq_detail.asp?id=64

Hey guys, I just bought a used powermac 7600/132 (60USD) from a friend. What I was wondering was; how far can I go with upgrading this machine? What size hard drive, how fast a processor, how much video ram? Can I install os 8.6 on this machine using the cd that came with my iMac DVSE? Any tips or suggestions would be appreciated.

TIA, Trey

Anyone here like the Young Ones?

Hi Trey,

You may want to also post this question at http://www.maccentral.com in the General Discussion forum. I've had good luck with getting speedy and accurate responses there.

Looks like you got a good deal on that Mac!

Donna

On very quick reading it seems that 7.5/8ns refers to pc Mhz compatibility, whereas all I talked about refers to the chip speed. They are measures of different things? It would be nice to have time to learn more. At that link there's a section on Mac memory & the difference between SIMMs & DIMMs, They are for different models and not interchangable.

It's not the PC's "MHz", but rather the speed of the data bus. It applies to newer Macs too... Memory bus speeds of 100MHz, 133MHz, 200MHz and 266MHz are now common in both the PC and Mac world, although the latter are usually designated as SDRAM rather than DIMMs.

O.K. Peet. I accept new knowledge, due to necessity. My Mac has a CPU speed of 200MHz & a bus speed of 50MHz (they'll both upgrade aprox. 50%). Back to YOUR original surprise- this is where 60ns/70ns chip speeds DO apply to the DIMM chips that the CPU requires (old knowledge). I can accept this is a suprise to you as 8ns chips are to me. I'll learn.