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Stickied this - this is great! :)

Eric Woo is the rose amongst the thorns - all legit pulls, never remarked!

@Stephen iirc was working on one of these?

@Zane Kaminski sells SIMM kits as he's Garrett's Workshop ;)

Nomenclature for PCB silkscreen time! R = Resistor C = Capacitor Y = Crystal / Oscillator FB = Ferrite Bead U = integrated circuit J = Header pins/connector Hope that helps!

Well, the easiest thing to do, would be to get hold of a System 7 ulity disk image, and then you can write the image to the floppy directly - do you have any other macs other then the plus?

Have you found a need for heatsink at 33MHz with those steppings?

Always an idea to look for a K63H - just as good as the L88M - you tend to find most of those at least are pulls, not NoS :)

Some nice, clear shots there! :)

Repairs are underway on 'the collection' - awaiting a flyback transformer from Dalbani - it must have taken a carrier pigeon to get here!

Yes, it's quite simple really - it takes very little time to register for an account here. Trading here is a privilege, not a right. For the safety of members and to cut down on spam, we decided that it's prudent to allow trading between members only. One of the other reasons why this section...

I think i have the older board - it was a New-old-stock one that i used for reference. Not sure if the photo's i take will be great though :p

Is that a known trick to make the contents of a PAL/GAL reveal themselves if locked? :)

John Burn's excellent resource on HP Workstations here: http://www.unixnerd.co.uk/hp_unix.html

I'm having a really hard time trying to find some of the DIP DRAM's used in the 500+ Has anyone got any lurking in their stores? After any of the following: 514256 424256 514256 44C256 44C256 514256 81C4256 71C4256 514256 534256 4C4256 44256

Have you tried the trick here that @TheBasement posted on his YT channel?

The chip you've used should be fine - it's rated for 70ns, instead of the 80ns stuff on the board. You can use this chart to cross reference the chips: https://ardent-tool.com/memory/Chip_Conversion.html

Some bus translation would be required to essentially put the 030 onto the 000 bus.

In all seriousness, merch is planned, but implementation takes a while. @fogWraith has the links for donations ready to do :)

Well the boards generally come to around £35 and come with almost all the rear side passives populated. Then you move over most of your parts. I do have a p&p and BOM for the board, i'll post those on GitHub soon. @MacEffects has the license for production, just a matter of when/if it goes on...