TVCGAFIX Utilities - Adjust CGA Output for TV

TVCGAFIX Utilities - Adjust CGA Output for TV

No comments
Here's a bunch of simple tools I put together mostly for my own use really, but some others may find them helpful. These programs allow you to adjust/optimize the video output of a CGA card (or 100% register-compatible) for a (CRT) television set. You can use them to align the screen position horizontally, fix various issues related to 80-column text display, and make the adjustments "stick" while running programs and games -- even booters. ...
Taking Decent Photos of your CRT TV Screen

Taking Decent Photos of your CRT TV Screen

6 comments
Recently I was prompted to try taking photos of the TV which currently serves as a monitor for my XT, because reasons (which may be made clearer in the future if I'm not lazy and/or distracted by other things).  After much trial and error, I think my current results provide an accurate representation of what's actually visible on the screen. Getting there wasn't exactly a walk in the park, so perhaps this post could prove useful for someone. ...
Flexi IBM VGA Font: a Scalable Take on Text Mode

Flexi IBM VGA Font: a Scalable Take on Text Mode

6 comments
The VGA ROM font has to be the most recognizable text-mode character set, whether you spent the 1990s as an ANSI artist or as a POS cashier.  Naturally it's all bitmap, but I've seen a few attempts to shape it into a truly scalable font, with a 'smart' contoured outline that would theoretically look good at any size.  For instance, there's Nouveau IBM (previously used for titles on this blog) or Codepage Mono. ...
So Long, Blogspot

So Long, Blogspot

5 comments
Finished migrating this blog from Blogspot/Blogger to my own domain.  Instead of a bloated, plodding, XHTML/JS-driven piece of crap hosted on a restrictive external service -- this is now a self-hosted, static site delivered straight to you without the need of a database or any client/server-side scripting (thanks go to Hugo for making it easy).  This means I get to control my own content, and you get a much leaner and meaner site. ...
Steel Survivor: an IBM XT Tale

Steel Survivor: an IBM XT Tale

2 comments
This month actually marks the IBM 5160's 35th birthday, so why not show off my working (and pretty much complete) specimen.  This is one of the later models: half-height floppy drive + ST-225 hard drive, 640K motherboard (fully populated), last BIOS revision (05/86).  The latest date code on the chips is 8649, so this machine was made shortly before the XT was discontinued altogether.  I received this from Trixter, truly a gentleman and a scholar, along with a separate box of stuff to round it out: an IBM PC/XT keyboard, a joystick, some software/games (including a boxed IBM PC-DOS 3. ...
Happy 35th birthday, IBM PC!

Happy 35th birthday, IBM PC!

1 comment
August 12, 1981 introduced us to the IBM PC, and to PC-DOS along with it. The latter included extensions for the machine's ROM BASIC, plus a slew of demonstration programs proudly showing off these indispensable capabilities: 4-color graphics and 1-bit beeper sound. One of them in particular went on to live in certain infamy as Bill Gates' first (and only) direct personal contribution to video game history: the inimitable DONKEY. ...
Keen 4 Mystery Code Demystified

Keen 4 Mystery Code Demystified

No comments
In my post on Keen 4 I mentioned a seemingly-unused routine in v1.4-CGA, which I ended up using as patch space for my own code.  Having no idea what it was for, I consulted the sources for Keen Dreams, and found that it looked an awful lot like a KDR routine which caches level data - specifically, CA_CacheMarks in ID_CA.C.  At some point during Keen 4's initialization, a single pointer gets set to this code; but immediately afterwards the address is replaced so this function is never executed. ...
Yet another 16-color CGA makeover: Keen 5

Yet another 16-color CGA makeover: Keen 5

1 comment
After giving Keen 4's CGA version a 16-color composite overhaul, I figured I'd have a go at the next episode, since the code has nearly everything in common with Keen 4, and the composite enhancements detailed in my previous post could be applied without too many essential changes (other than different offsets/addresses, of course).  Let's strap this one to the rack then: As before, the distribution is a runtime in-memory patch (using CK5PATCH) and you'll need the original KEEN5 CGA files (v1. ...