Recent content by resman

I bought a Compaq Portable from the East Coast that was sold with a non-working hard drive. It was packaged well, but did suffer a little cracked plastic, probably from being thrown off a shipping transport on to the ground. However, the knock was enough to unstick the drive platter and I had a...

Not myself, but the previous version had a port to the Beeb. Another intrepid individual is porting to the PR6502, which looks very promising: https://picocomputer.github.io/ Porting the VM isn't particularly difficult, but there is much to do to get all the I/O libraries converted. I had...

Perhaps the issue with FORTH is that isn't "just another programming language". And for that matter, neither is LISP (kind of the reason I picked these two to implement). For me, both require a shift in thinking from a more traditional Algol style of programming and takes some time to get the...

Ironically we used my roommate's 1702 in college as a video monitor hooked up the VCR. It was quite good for that.

This is where the Apple Monitor IIe and IIc help out. Here is my Apple //c connected to a Monitor //c in 80 column mode - not quite RGB quality but very serviceable (and the convergence on this particular monitor isn't that great, either):

Yeah, that was a while ago. I'd imagine your patches are similar. I'll look for the disk image, but make no promises - I'll have to dig through a bunch of floppies.

PLasma Enhanced InterActive Development EnvironmentS After a long gestation period, PLASMA has been reborn as PLEIADES with many new features, enhancements and bug fixes. Currently supporting the Apple II and Apple ///. TLDR; Check out the video: From the GitHub project page...

My best guess is that the additional memory is causing the weirdness. The LORES code counts on the CGA wrapping access beyond 16K, not just for video scan out, but for CPU access. A generic CGA should decode 32K of memory space but alias the first 16K in the second 16K. In the inner loops, LORES...

I probably don't know what I'm taking about, but one of the issues getting composite color out of the CGA (in 80 column mode especially, the 160x100 pseudo graphics mode in my case) was the shortened color burst signal. You'd have to tweak the CRTC for the monitor to sync to the color burst and...

This is the book that many of us learned to work with HGR graphics from a low level software standpoint: https://archive.org/details/AppleGraphicsArcadeGameDesign It has a pretty understandable, if not idealized, description of how it works. But if you're trying to get into the gritty details...

Not sure this app fits your bill, but I use GoodReader on my original iPad. Yes, iPad version 1. GoodReader, at least the early version I have, lets you download files (texts, PDFs, etc) over the local network using SMB. Still use it, but I came to the conclusion at the beginning that I'm not an...

Try 'CATALOG,D2' https://archive.org/details/the-dos-manual

For varying values of "fun", you can try XINU: https://hackaday.io/project/194283-pc-xinu-brought-from-the-abyss I was able to get into Comer's last class he taught on XINU, and it was a lot of "fun". For an OS geek, anyway. Although we used LSI-11s, it was further developed to run on PCs, and...

I think one of the under-appreciated and under-utilized modes of the Apple II (128K //e and newer) is the Double Hi Res Graphics, probably due to its mind-warping memory organization. I've seen a recent interest in revisiting this mode, me included. Hopefully we'll see more demos/games/utilities...

Just looking at the flat Earth from an oblique angle ;-)