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Tag Archives: assembly
The DOS SDK
A thing I have been working on, on and off, for many years now, is a set of headers and helper routines for programming DOS machines directly on the hardware in assembly and C. As you may recall, my earliest … Continue reading
Experience and skill in software development
I just spotted a number of hits from Ars Technica to my blog. It is a regular event that one of my blog posts gets posted in some online discussion, causing a noticeable spike in my statistics. When it does, … Continue reading
Posted in Software development
Tagged Agile, Ars Technica, assembly, bug, Code, computer, debug, design, machine code, machine language, Microsoft, patch, Pessimist Pamphlet, programming, skilled developer, software
8 Comments
PC-compatibility, it’s all relative
Update 21-12-2015: I have updated some of the information after testing on an AT with old Intel 8259A chips, and added some extra information on EISA and newer systems. I would like to pick up where I left off last … Continue reading
Posted in Oldskool/retro programming, Software development
Tagged 286, 8088, 8259A, ASM, assembly, AT, demoscene, DOS, oldskool, PC, PC/XT, PCjr, retro, retroprogramming, timer interrupt, x86, XT
11 Comments
Latch onto this, it’s all relative
Right, a somewhat cryptic title perhaps, but don’t worry. It’s just the usual 8088-retroprogramming talk again. I want to talk about how some values in PC hardware are latched, and how you can use that to your advantage. Latched values … Continue reading
Posted in Oldskool/retro programming, Software development
Tagged 8088, 8088 mph, 8253, 8259, assembly, CGA, retroprogramming
3 Comments
Fixing Genesis Project’s GP-01
Shortly before our release of 8088 MPH at Revision 2015, another 8088+CGA production surfaced at Gubbdata 2015: This production was GP-01, by Genesis Project. One the one hand we were happy to see more people targeting the 8088+CGA platform. On … Continue reading
Posted in Oldskool/retro programming, Software development
Tagged 8088, assembly, CGA, demo, demoscene, Genesis Project, GP-01, oldskool, retro, x86
5 Comments
8088 MPH: The polygons
The last effect in 8088 MPH to be discussed is the polygon renderer. As already mentioned earlier, it is not a regular polygon renderer, but actually a ‘delta-renderer’: it does not rasterize pixels directly, but for each scanline, it uses … Continue reading
Posted in Oldskool/retro programming, Software development
Tagged 5150, 5160, 8088, 8088 mph, ASM, assembly, CGA, dither, flatshade, IBM, IBM PC, IBM PC/XT, Intel, lambert, optimize, polygon, rasterize, span buffer, video memory
4 Comments
8088 MPH: Sprites? Where we’re going, we don’t need… sprites!
I would like to give some technical background information on the sprite part in 8088 MPH, but before I do that, I want to discuss the music and the musicians, as they did not seem to have gotten very much … Continue reading
Posted in Oldskool/retro programming, Software development
Tagged 8088, 8088 mph, Amiga, assembly, bobs, CGA, IBM, MS-DOS, PC, Sprites
10 Comments
8088 MPH: How it came about
Well, you’ve already seen the demo in my previous post. And Trixter, reenigne and VileR have already covered most of the technical details in these articles: 8088 MPH: We Break All Your Emulators 1K colours on CGA: How it’s done … Continue reading
Posted in Oldskool/retro programming, Software development
Tagged 4.77 MHz, 8088, 8088 mph, assembly, CGA, Composite, demoscene, DOS, IBM CGA, IBM PC, IBM PC/XT, NTSC, oldskool, OpenWatcom, optimize, polygon, programming, retro
16 Comments
Test Drive’s pixelized transition effect
Today I want to talk about the transition effect in the game Test Drive from 1987. The effect will switch from one image to the next by replacing it pixel for pixel in a somewhat randomized pattern: I discussed this … Continue reading
Posted in Oldskool/retro programming, Software development
Tagged ASM, assembly, DOS, graphics, MS-DOS, optimize, performance, retroprogramming, screen pixels, Test Drive, x86
4 Comments
CGADEMO by Codeblasters
Today I want to talk about a rather obscure, yet interesting demo, namely CGADEMO by Codeblasters, from 1992: As you can read from the scroller, what’s interesting about this demo is that it runs at full framerate (60 Hz) even … Continue reading
Posted in Oldskool/retro programming, Software development
Tagged 4.77 MHz, ASM, assembly, CGA, CGADEMO, Codeblasters, demoscene, IBM PC, IBM PC/XT, optimizing, PC, retro, retroprogramming, x86, XT
16 Comments
Scali's OpenBlog™ 