Two Stop Bits | Screwtapello's comments

Screwtapello 505 days ago | parent | on: Little Sound Dj is a Game Boy music sequencer
So LSDj is now freeware, instead of shareware? Neat!
Screwtapello 509 days ago | parent | on: QuickTake for Apple II
I'm really curious why the QuickTake is designed to only start transmitting once the serial port signals it's not ready. Is that some kind of proprietary change to make it harder to reverse-engineer? Is it a quirk of the way RS-232 is designed as a client-server protocol rather than peer-to-peer?
- bmonkey325 509 days ago
  Rs-232 is an electrical signalling mechanism. The pins are there to create a protocol but it’s not enforced or required. In this case they are flashing DTR high low just to act as a “wake-up”. DTR being down doesn’t have control of what signals pass on the other pins eg Rx/Tx/CTS/RTS
Screwtapello 518 days ago | parent | on: Welcome to the recovered visual6502.org Wiki!
Huzzah!
There seems to be another mirror on the NESdev wiki[1] but in the retrocomputing game, more backups is more good.
[1]: https://www.nesdev.org/wiki/Visual6502wiki
Screwtapello 522 days ago | parent | on: Alpha Font Collection for Palm OS
Is there some way to extract the font data for use with other systems?
Screwtapello 531 days ago | parent | on: TR1X: An Open Source Implementation of Classic Tom...
I spent some time looking into it a few months ago, and TR1x was easily the least sketchy and most reliable of all the engine re-implementations I could find, probably because it's based on a decompilation rather than completely from scratch.
- anthk 528 days ago
  Well, I meant about the build process on OpenLara; too complex to follow and it used c++ which was hard to fix some compiling errors. The easier one uses GL 3.3 and that was a no-no in my netbook, which supports up to GL 2.1.
Screwtapello 532 days ago | parent | on: Adapting WozMon for the breadboard 6502 [video]
Literally all of Ben Eater's videos would fit right in here; I haven't been submitting them because I wasn't sure whether people would like video submissions and because I didn't want to flood the place.
If anyone is interested in a guided tour of TTL hardware design, I recommend any and all of Ben Eater's breadboard 6502 videos!
Screwtapello 537 days ago | parent | on: Undocumented Z80 documented (2005) (pdf)
This submission uses the HTTPS protocol, but the web server has a self-signed certificate. If that's a problem, it seems to work via regular HTTP also.
- jgrahamc 537 days ago
  I've changed it to http:// for clarity.
Screwtapello 541 days ago | parent | on: New feature: tags page
Wow, there sure is a lot of 6502 love around here! Not that I'm complaining.
- jgrahamc 541 days ago
  That's probably because I submitted a lot of 6502 stuff early on. I imagine as the site grows that'll change.
Screwtapello 543 days ago | parent | on: EOR #$FF: 6502 Ponderables and Befuddlements
From the book's description:
> This book contains a collection of tiny 6502 assembly language programs. The goal: practice your code reading by puzzling out the significance of each assembly “ponderable”. Explanations are given in the back. Note: Exposure to 6502 assembly is highly recommended, as this is not an introductory text.
Screwtapello 544 days ago | parent | on: Apple II Pro: an OpenType font of the Apple II cha...
It even includes the MouseText glyphs introduced with Unicode 13.
Now if only I could find a library for drawing MouseText interfaces on a modern terminal...
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