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Since I mentioned the project here, I'll follow up on it here. Using 128MB SIMMs on NetBSD with a stock ROM, stock everything centris 650: Using tmpfs: c650# df -hl Filesystem Size Used Avail %Cap Mounted on /dev/sd0a 3.7G 749M 2.8G 20% / kernfs...

I can hear it crying out for a rom SIMM socket, a rom SIMM, and two 128mb sticks of ram!

Me too! tecneeq: thanks, I've been cross compiling the kernel and whatnot a bit (that's how I did the kernel hack that I think enables the djmemc bank configuration). I was able to get an hp300 bootloader built that works for my setup and a netbooting hp300. Unfortunately, it's not an exact...

I put a ROM socket on my 630 a while back and tested it out. I can't remember the exact results, but I believe it worked it just doesn't share any overlap with other ROMs so any customizations would be 630 specific, which made it a bit uninteresting at the time (especially considering they rom...

I've finally taken a look at mac68k netbsd. Given what I've posted here, I'm 99% positive it's entirely feasible to create a MacOS-less booter for netbsd. Not that I'm volunteering for such a thing, just pointing out that it is possible. Then maybe the netbsd mac68k installation process could...

techneeq: you mentioned you have a 650. Do you have one of dougg3's ROM SIMMs? Can you put a SIMM socket into it? It might be interesting to see how well netbsd does with the modified ROM to allow 520MB RAM in those machines.

It's http://www.bomarc.org/ I've purchased several schematics from him. He's a great guy, the schematics have been accurate for everything I've used them for, and the prices aren't outrageous. Rather than scanning and sharing them, they are still for sale and reasonably priced IMO.

Looks like I did the //c stuff 4 years ago now.

Gorgonops, your keyboard issue kinda sorta sounds like a problem I had with a //c that ended up being the character ROM being bad. This kind of seems more like a blog listing more applicable to the Lounge than hacking, but hey. For my projects, I've mainly been working on getting the AppleTalk...

I have this card. It requires 24bit mode. It also may not like the q950's serial ports due to the IOPs sitting in front of the SCC.

FWIW, there were ROMless 040 accelerators for 030 and earlier machines which predated the 040 and did not have 040 instructions in ROM. The Presto LC for the original LC for instance, has no ROM on it (AFAICT). The Daystar 040 has ROM and is doing a bunch of ROM patching, but some of these...

More than 4MB of RAM bumps up against the ROM address space in these machines, which is ultimately the limiting factor. Additionally, SCSI sits in the middle of a relatively large hole in the address space above ROM. For 128k through 512ke machines it would be reasonable to have a 5MB ROM...

In the early mac ROM (128k and earlier, which displayed 6 hex digits for sadmacs instead of the two rows of 8 digits like later macs), the first 2 characters indicate the test being performed. The second 4 characters are information about the test being performed. For those following along at...

I was able to test with both a 128k and a 512k and they weren't able to boot. After attempting to boot from the floppy, they came up with sadmac error code 0F0062, which doesn't seem to be documented in either the Apple KB or The Dead Mac Scrolls. When investigating, it looks like there's a...

Thanks for releasing everything and spending the time on the instructions, it was a huge help! This is awesome!

Foundations of Mac Programming by Dan Parks Sydow? Perhaps the von came from the actor Max von Sydow?

JDW, I will attempt to answer your questions to the best of my ability, although let me just prefix the questions with an aside. I've kind of stopped posting ROM modification updates or documentation in this forum because it is inherently walking a fine line with respect to this forum's rules...

Submitting projects requires planning and foresight and documentation and stuff. That sounds hard. I have been doing stuff, I've just been lazy about documenting it. And I don't usually plan out projects, it's more along the lines of having an idea and doing it. In no particular order, the...

I don't have a IIci so can't do some of the leg work on this, but the Guide to the Macintosh Family Hardware documents bit 0 of register A of VIA1 as "reserved". This bit is pin 2 of VIA1, and should connect to the diagnostic edge connector with a pull-up. The II, IIx, and SE/30 are documented...

My suggestion for the wiki was for ease of reference, as opposed to digging through all these posts of meta-discussion on how to post the information, and would avoid the flood of potentially dozens of new topics with one topic-per-model. Don't get me wrong, the information is useful and I...