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Thanks for the update. If you do have any stability issues, they might be most cheaply resolved by just adding a fan to the heatsink. The chipset is designed to handle 40MHz and so should be happy. One other issue I had was that I found that some of my RAM didn't like running at 40MHz, I'm not...

Excellent news - that was quick :) Your Centris should now be just a hair faster than a Quadra 840av! What System version are you using? Did you use my System Enabler? What type of jumper did you use? Do you have a picture of the jumper you fitted?

(You'll have to forgive me - I made several edits to my last post, so make sure you read the final version)

Mine actually started as a 25MHz machine :) I've run it all the way up to 50MHz with various mods. Strangely, it is easier to convert a 25MHz machine to 40MHz than to 33MHz. I'd actually recommend going to 40MHz rather than 33. 1. If you're running System 7.1, install the System Enabler I...

Good morning @AlpineRaven. If you don't mind, I'll have a go at answering. I have a soft spot for Wombat family machines. That's fun - my dad has a Quadra 650 in a IIcx case in a similar manner. One thing to start with - I've heard that DOS cards work in over clocked machines - but I don't have...

If you're aiming for 40MHz, there are much easier ways to do it - plus you can use 40MHz timings, so that the serial ports etc keep working. https://elephantandchicken.co.uk/stuffandnonsense/?p=3019

I wouldn't say it was dead - Dmitry and a few others are still doing interesting projects, hardware and software. https://dmitry.gr/?r=05.Projects&proj=27.+rePalm https://palmpowerups.com/articles.html https://palmdb.net/

I have a couple of different ones, but have a soft spot for the 68k based ones. The guy who wrote Chipmunk Basic for Mac also wrote palm software, including a Basic Interpreter called yBasic or HotPawBasic.

Hum, I think you're getting muddled there - the LC 475 is very different to the LC III. The LC and LC II were very similar to each other, but the LC 475 has more in common with the Quadra 610, 650 and 800. Even then the chipset isn't that similar... just related. The LC III has much lower (what...

This is an LC 475 with a 128MB module fitted : The memory test takes almost exactly 1 minute with this much RAM.

No hardware fix needed - these just work up to 128MB with compatible RAM. Yes... but not more than a minute for 68MB. Something isn't right. Does it chime? Is it the normal chime? So Macs will generally work with Parity RAM, but it doesn't "Use" it - it ignores the parity and just uses it as...

I believe so, based on the datasheet. Looks like it is a 64MB SIMM. The LC 475 can take up to a 128MB SIMM, FPM. It should work with that SIMM, although I don't think the lid will fit on the case (I'm pretty sure - so take care).

The wait states are changed depending on what bus speed is selected to keep in spec for the speed of the parts used on a stock LC 475. I wrote the software to work with 80ns RAM at 40MHz.

I've shared everything I can before.

The 475 and 575 use a chipset derived from the 650 / 800 chipset. They're all technically spec'd up to 40MHz. There are datasheets floating around.

I suspect it isn't what you're thinking, but interestingly @Trash80toG4, only the CPU and PLL aren't rated for 40MHz on the LC 475. I've replaced both of them with 40MHz rated parts on mine, so my 475 is effectively upgraded to a 40MHz machine rather than Overclocked. Memory (RAM, ROM, VRAM) are...

The same version should be available in both places, but I'm more likely to forget to update my website than Macintosh Garden. I would start by putting a 40x40mm self adhesive heatsink (something like these : https://www.aliexpress.com/item/1005004497885109.html or these ...

Surely, you could test RadiusShare to confirm if the card works instead of asking other people to set up specific configurations?

Yes, RocketWare makes it behave as an accelerator, RocketShare is more like a modern Virtual Machine. If adverts say it can boot from a disk on the booster in RocketWare mode then it must be able to, but... I'm surprised. The Mac, by default, wouldn't know about or be able to see the drive...

Hum, also, given the booster is on the Rocket's PDS, I'm not sure how you'd be able to boot the IIci from it? Have you tried it in RocketShare? Does it work there?