Installing an 8•24 GC display card fixed the video problems. I might only need to replace the cap on the old card to make it work, but I'd rather use the proper accelerated Apple one anyway.
I also cleaned and lubricated the floppy drive, so it now loads/reads/ejects disks properly.
Sound also...
No luck, the problem persists. Also I'm having power-on circuit issues, which is not a new problem, but worth mentioning. If power is applied, it boots. If I shut down, it immediately reboots. This is with a new power supply from a 7100.
A friend of mine mentioned that it might be a sync-on-green issue, which might explain why darkness causes issues. Tomorrow I'll take a look at the output with the oscope on my logic analyzer to see what the signal looks like.
I have a Macintosh IIcx with a 14" color monitor (M1787) that has some issues.
When anything dark is drawn close to the left screen edge, a dark splotch runs across to the right. If nothing is there, it looks mostly fine. Any idea what might cause this?
Oh, Linus Åkesson's stuff is awesome.
Recently I read about the Macintosh Display Card 8/24 GC, which is a nubus display card that uses an AM29000 RISC CPU to do quickdraw operations on its framebuffer. One of the particularly neat things about it is that it can operate as a NuBus master, which...
Hey no problem, we've touched on a bit of everything here!
The board I have is the Digilent Nexys2, which I got a few years ago for $100 with an academic discount. Apparently they have a Nexys3 now, with a Xilinx Spartan 6 (vs the Spartan 3 on my board). If you get that one you can use the new...
Couldn't leave well enough alone... I had to go back and add some counters and offsets to make it scroll.
I know everybody in the history of everything has done a XOR effect, but it's still pretty cool to do it yourself for the first time.
Next step is to add a framebuffer. I'm not sure how...
Hooray, colors!
I worked on that last night and today. Lots of learning about the xilinx toolchain, verilog in general, and VGA signals. Finally got it!
Hey all, I haven't popped in here in a while, so I wanted to give a quick update.
I have my Digilent Nexys 2 FPGA board set up, and I've got all the development tools installed in linux. I tested out some VGA signal generation code from a friend, and it works! I'm not going to use his though; I...
Yeah, Minix! I remember Bill Buzbee got it running on his wire-wrapped TTL CPU "Magic-1." Seems like a good option.
Hah, "life and stuff," always getting in the way. Big things (good things) are happening with me at work these days, which keeps me quite busy, but in a couple weeks my project...
That cypress psoc looks fantastic. Very interesting. I had seen the freesoc before but I didn't think it was anything more than a funky arduino clone.
Hah, yes. I suppose I was trying not to seem completely self-serving in my characterization of linux systems, but I do agree with you there.
On...
I won't argue with that, haha.
Edited to add: Part of the reason I seem all over the place is because I'm thinking very long and hard about what it is I really want to do. I've been sitting here writing and thinking much longer than I would like to admit (hah), but I think this post is a big...