7500/100 and a nice screen

[protocol7]

I actually "got" this two weeks ago but it's taken until today to collect it thanks to the snow. It came with a Formac ProNitron 21/700 screen. Looks the part

Also came with a couple of surprises; one good, one not so good.

The good: a Phase 5 Maccelerate! 750 G3 accelerator card (running at a bit over 400mhz).

The bad: cdrom won't read ANY discs. It shows up fine in Profiler but when I load in any discs (original or copies) nothing happens. No activity light on the drive. Nada. So I can't do a whole pile with it right now apart from look at it.

 

[jsarchibald]

I got an LC575 recently with the same problem. I copied the extension from another computer, and voila!

 

[protocol7]

It's definitely the drive itself. I got it going by swapping it out with the one from my 5400. Not sure what the problem is, but it's mechanical, not software.

However in all the commotion, I forgot to back-up the control panel that controls the G3 card. And I can't find a copy anywhere online

 

[Unknown_K]

Most G3 upgrades for the 7500 only use the control panel to enable the cache, and any utility that does that should work. The settings for the G3 speed are either set by jumpers or auto config when installed.

http://www.powerlogix.com/download/G3G4CacheProfiler1.5.sit is one util but the link seems dead, try googling for the filename.

 

[protocol7]

I got that one and CPU Director as well. I'm just not sure about how to config the cache as there's different speed/ratio settings. But if that's all it does then it's not a complete loss.

But I wish I'd kept the control panel. Seeing as it's so hard to find I could have upped it for others who might want it.

 

[Unknown_K]

Cache is usually half the CPU speed (depends on the speed rating of the cache), so 200 for a 400 Mhz CPU.

 

[protocol7]

The Powerlogix tools show the CPU at 376Mhz so I've set the cache to 188Mhz (2:1 ratio). I remember seeing a 2:1 ratio in the original control panel.

What's throwing me now is that I've tried benchmarking it with cache enabled and disabled (using CPU Director) but I get the same benchmarks (using MiniBench 2). Should I be using a different benchmark tool?

 

[protocol7]

MiniBench was the problem I guess. I tried MacBench and enabling the cache quadrupled the CPU score. I'd still like to find the proper BCache control panel if I can. It also had some kind of compatibility setting where you could select 601, 603 and 604. Not sure what it did.

I'm using XLR8 MACh Speed Control now and I noticed that unlike the original BCache panel and the Powerlogix tools, the System Profiler displays the correct clock speed of 376Mhz. Before this it always showed 418Mhz.