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It's all good, comparing _Unimplemented to a trap name you want to check is something I read a few days ago while I jumped around in the excellent vintageapple.org collection of programming books. I'm glad it's that easy for my purpose! Thanks guys. Also if a MacXL user gets an error due to my...

But that covers what's every system version between the first and 6.0.3 (or under 6.0m4), so it's not exhaustive, meaning I don't catch every situation where I can comfortably not have to deal with color pixel depth. Edit: oh wait, that's for Gestalt

Yes, but thanks for reminding me that CopyBits steamrolls the bit depth in during the copy. I may not stick with CopyBits in all cases, though. It's perfect for slow applications though. This worked nicely under various conditions in Basilisk II and I get a nice monochrome image pasted in from...

Black and white compact macs targetting mostly 512x342 in 1-bit color depth field BUT -must not crash if a more recent machine is used -System 7.5.5 is the most recent that I target -When possible and not too feature rich, System 1.1 on a 400k MFS disk should run my stuff -must gracefully...

Since July 4th: I achieve solid control of the soft power mechanism. I soldered a wire between 2 ground loops underneath the logic board like so: As you can see in the picture, there are 4 of these "rings" total on this LC550 logic board. I soldered a wire to bring them all galvanically...

Things I've tried in the past 2 weeks: -Mess with PP1 and PP7 (I know I shouldn't have!) to bring them back closer to their original orientation based on photos I took early on. PP1 is left a smidge under 5.00 V. -Test the continuity between ground loop-ring things underneath the logic board...

I'm wondering if this is a possibility if I get desperate, can a LCIII's chip be used as a swap in for the LC550's? It's the closest mac I have to it in terms of technology and it's in pretty bad battery bombed recovery shape as it is anyway

Ok, I used this pinout (ADB socket on the back of the logic board) soldered wires directly on the Apple CUDA 341S0788. pin14 = GND (could have used so many other points but whatever) pin25 = PS_ON pin. Continuity to either of those went correctly on the socket at the back. NEW...

Further work done: -Recap the rest of WHOLE DANG analog board (ie 100% of the console5 kit) no change -Clean the CUDA chip (responsible for ADB and soft power) no change Dismount the analog board, the main computer cage and metal shield to see if some piece of the snap in the case was...

I seemed to have made some partial progress. I cleaned the CUDA chip some more with alcohol (lc550 board, it's not the egret chip since I don't have a stock CC1 MB). I heard death chimes for the first time in a loooong while! I experimented with board insertion at slightly different angles...

This video was very illuminating and gives me hope of maybe finding a silver bullet to my 'ramping up, ramping down' (timestamp around the area where he explains the switching part):

So I was able to spend some time today on the analog board: Replaced DL21 and DL22 with these: 1300mW, 5%, Small Signal Zener Diode Replaced both optocouplers CNY75GB with these CNY75B Noticed the sad state of the pins for the edge connector: so I solder wicked all of that out...

I'd like to test known voltages on several transformer output pins (or zones elsewhere) but I need to double check what pins do what first: (I'd love to have some semblance of idea about which rating each pin is supposed to give me; fattest traces should be ground, maybe?) By the time it...

I recently posted a thread over at the conquests section, where I detailed my purchase of a CC1 from Yahoo Auctions Japan, which turned out to be a effectively upgraded to CCII with a LC550 logic board. It featured a cracked case thanks to the shipping and the sting out of the ordeal is greatly...

I came across this demo I had forgotten in some nondescript collection of graphics applications folders I had laying around. Some people in the Boston Computer Society took it upon themselves to recreate (in 1986) the 'boing!' demo from the Amiga which features a fake 3d bouncing ball animation...

So........ buyee refunded both the machine ($135 CAD) and the shipping ($223) - the part that was paid by paypal appeared immediately, still waiting on the normal delay for the part that was done with my bank account. Wow. Ok. Thanks for the keyword searches, I'll check that out for the repair.

Still waiting on a 1-2 week long decision for a refund claim, but I thought I'd check out if my pieces fit the cracks. I'm missing an important one. I'm considering acetone (I'll just use a nail polish remover) to try to bond those pieces together. I'd love a rundown on if it's a good/bad idea...

What games do you recommend for it in 512x384 mode for starters? So far in my first tests, I launched Oregon Trail, Prince of Persia, Crystal Quest, Indiana Jones Fate of the Atlantis. I'll also pay more attention to the color supporting games in The Secret History of Mac Gaming as well.

Ah, Pascal, just outside the scope of my direct help. Here's the code I used in C ages ago, probably lifted from a MacTech article as well: https://mu0n.github.io/ForayInto68k/code/NoMenuBar.c.txt I suppose one could port C to Pascal by using the same addresses and ROM trap names.

My knowledge of that era of mac is extremely sketchy and fragile, thanks! LC*coughcough*something