Questions tagged [graphics]

For questions regarding graphical - as opposed to text - processing and display.

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5
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3answers
651 views

Performance characteristics of the DEC Type 30 graphical display

The DEC Type 30 was an early vector graphics display, that was used for an astonishingly wide range of applications for the 1960s. It used a 16-inch circular CRT with high persistence phosphor ...
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0answers
44 views

PowerAnimator System Requirements?

I was curious: what was the cheapest/wimpiest computer you could run PowerAnimator back in the day on? My guess would be a base model SGI Indy.
6
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0answers
148 views

Was there an Evans & Sutherland display system capable of rendering ordinary data as motion through a landscape?

Around 1987, the investment bank I worked for had a high-end graphics device, possibly from Evans & Sutherland, which produced an "animated" display not unlike the view from the front ...
4
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1answer
211 views

Apple IIc : displaying HGR page 1 in AUX memory

I need to display HGR page 1 ($2000 to $3FFF) located in AUX memory (not in MAIN memory). According to the "Apple IIc Reference Manual - Volume 1", page 45, I must first turn 80Store on by ...
29
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6answers
7k views

Was there a specific benefit to inverted (XOR) mouse cursors other than aesthetics?

As far as I can remember the inverted (aka "XOR") style of mouse cursor has been around as long as there have been mice. I mean something like this: (source) where the cursor shape is ...
11
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10answers
3k views

Hardware assisted Graphical User Interface?

I have read a fiction novel in which a manufacturer in the 80s provided GUI by adding a dedicated drawing hardware besides videocard or by extending videocard. Fictional as it is, is this possible or ...
13
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1answer
502 views

Where did the # notation for hexadecimal RGB colour triples originate?

The hexadecimal notation #RRGGBB for RGB colour triples has been popularised by HTML and is commonly associated with it, even though nowadays it is not usually used in HTML directly, but rather ...
5
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1answer
186 views

Multi-GPU PowerMac G5?

I’ve got a 2005 PowerMac G5, Dual 2.3 GHz with a stock Nvidia GeForce 6600 running OSX 10.4 Tiger that I enjoy experimenting with, purely for fun and to learn writing legacy software in XCode. Would ...
5
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2answers
427 views

How 3Dfx Voodoo 1 Emulator works

reading of this question brings up 3Dfx Voodoo 1 Emulator in my memories. I always wandered how did it work so good time as any to ask... My memory is hazy on the details so I might miss remember ...
9
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1answer
1k views

How did the Rush 3D engine in Crazy Taxi: Catch a Ride work?

In an interview with the developers of the Crazy Taxi game for the GBA, they mention that they were able to achieve 3D graphics with a pure-software 3D rendering engine that they called Rush: It is a ...
5
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1answer
218 views

Did the Power Macintosh 8500 have accelerated blitting?

Looking at online specifications for the Power Macintosh 8500, I was able to find few details on its graphics capabilities beyond quantity of VRAM and supported color depths, refresh rates, and ...
5
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2answers
469 views

NEC PC-88 video mode and resolution in games

I learnt that there are 4 video modes as described on wiki. I came across many games for the PC-88, like Thexder (1985), which are in the aspect ratio of 4:3 and in more than 2 colors. I don't ...
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1answer
234 views

Did the Tiger Game.Com include any hardware accelerated graphics?

I stumbled upon screenshots of the Tiger Game.Com handheld running its Resident Evil 2 port and I'm curious to know what its graphical capabilities actually are: (from: https://twitter.com/_Kimimi/...
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2answers
337 views

Would there be any practical use of two or more VDPs or sound chips in a retro computer build?

Would that allow for better sound samples or double/triple the number of sprites & colours on screen or would that put too much pressure on the CPU or cause bottlenecks, maybe requiring 2 CPUs for ...
5
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3answers
501 views

How did 1980's 8 bit video game coders create realistic fireballs and explosions?

Back in the 1980's, I tried my hand at programming video games, mostly using Atari's player/missle system which used sprites. I could freehand draw most sprites but couldn't come close to the animated ...
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1answer
4k views

Did any PS1 games use 640x480?

I'm used to the idea that the maximum resolution there was any point in trying to generate on NTSC TV sets was about 320x224 (or 240 as a compromise figure between NTSC and PAL), but according to ...
16
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1answer
5k views

How did SNES render more accurate perspective than PS1?

The PlayStation was notorious for texture warp, because it didn't have the transistor budget to implement perspective: Why do 3D models on the PlayStation 1 “wobble” so much? But wait a minute. The ...
6
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0answers
388 views

Why was the Nintendo 64 bad at textures?

The Nintendo 64 had a reputation for being great at drawing triangles, but not so good at texturing them, so that many games fell back on heavy use of untextured (though Gouraud shaded) triangles, ...
48
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4answers
15k views

What causes that “organic fade to black” effect in classic video games?

This happens a lot on older consoles than this, but for this specific example, I'm picking what I spotted today: Harvest Moon for PlayStation. Here is a screenshot of the player just about to exit an ...
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2answers
592 views

Does an OS, in particular Unix, need special support for terminal colors? [closed]

Also of interest, would be the first OS to support color graphics in other ways (assuming it wasn't a Unix). Background: I'm thinking of playing around with Unix v6 due to all the material available, ...
3
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1answer
301 views

What are these graphical display commands?

I have a Pascal program with a fair amount of inline assembly code in it which demonstrates the capabilities of «Электроника МС 7401» — символьно-графический видеотерминал (Elektronika MS 7401 - ...
8
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1answer
976 views

Why does the Applesoft BASIC have shapes?

Why did Apple include shapes in Applesoft BASIC? There are no sprites on the Apple II, but shapes provide a simple vector drawing tool. As graphics go the shapes are kind of an odd duck, they provide ...
38
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2answers
4k views

Was AGP only ever used for graphics cards?

Reading on the AGP spec, the little bits I've found on sites like https://old.pinouts.ru/Slots/agp_pinout.shtml, say: The Accelerated Graphics Port (also called Advanced Graphics Port) is a high-...
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1answer
202 views

What exactly could cause corrupted graphics in WinG performance test?

Wikipedia article for WinG says the following: WinG would also perform a graphics hardware/driver profiling test on the first execution of the program in order to determine the best way to draw DIBs. ...
4
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2answers
356 views

Vintage computer composite graphics

I am working on designing a vintage computer and I have been using the TMS9918ANL. After working with it for a month or two and not making much progress, I really want to switch to another chip. I am ...
8
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1answer
799 views

What kind of 256 color palette did the Enterprise 64/128 have?

The Enterprise 64 or 128 Home Computer apparently had a palette of 256 colors. However, that is pretty unusual and doesn't fit evenly into the typical 3 channels for RGB. Wikipedia doesn't provide any ...
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5answers
2k views

Which system was the first which was capable of running graphics programs remotely?

It's well known the X11 is capable of displaying a program's graphics output remotely. I checked the source code of the earliest version of X I found (X10R3, from 1986), and I found that this version ...
11
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2answers
780 views

Why was SLI for gaming introduced and supported in the first place?

(I'm not sure if this is the correct place to ask this, please let me know if should post this somewhere else) For a long time, using SLI for gaming has been dying out and for good reason. From what I'...
5
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1answer
238 views

Why are the CBM control codes for color setting so spread out?

The control codes (my C64 handbook actually calls them ASCII codes) for color changing on the Commodore 64 are as follows: Color Control Code Color number BLACK $90 0 ...
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2answers
310 views

Is there a way to blank out a portion of a screen on Commdore C64?

I would like to blank out a couple of lines between two given rasterlines. Above that I'm planning to have a scrolling background and sprites, below that is a textual info area. I'm thinking of a ...
2
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0answers
140 views

Help debugging a circuit/code for Z80 and TMS9918ANL

I am working on designing a Z80 computer that utilized the TMS9918ANL for graphics. I am currently just trying to make sure the TMS9918ANL is working, so I hooked up the control pins the bus (...
2
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1answer
109 views

TMS9918ANL question

I am working on setting up a TMS9918ANL Video Display Processor. I was wondering if there is any way I can test to see if it is working without having the DRAM hooked up (I have a while before the ...
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3answers
4k views

Why did many 9-pin printers use only 8 pins for graphics?

In the answer to another question about printers, the following claim is made about 9-pin printers: The Epson MX-80, upon which many other printers were based, had nine round pins which were ...
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1answer
385 views

Using Bresenham's circle algorithm (or another alternative algorithm) to draw an arc [closed]

I'm trying to create some graphics function for a ZX Spectrum (Z80) machine in assembler. I already have the basics except for the arc. I know that there must be some way to draw an arc using the ...
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3answers
3k views

Typical dpi of dot matrix printers available in the 1980s

I have several printouts from what is presumably a dot-matrix printer, dated 1987. When zoomed in on these, you see the usual stair-step patterns on diagonal lines. However, it's difficult to ...
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0answers
263 views

Thinking through the design of a TTL video card: what memory chips and how to manage memory? [closed]

Inspired by Ben Eater's "Let's build a video card" aka "World's worst video card" two part projects on YouTube, I was inspired to consider designing a display adapter for my passive backplane TTL mini-...
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7answers
2k views

What are principles of vector CRT display? Simplest way to drive CRTs?

I am into playing with TTL to build 1970s style minicomputers. Aside from talking to them via some serial (or parallel) I/O port to a terminal, I am wondering about display output. This here is about ...
8
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1answer
580 views

Was there ever a functional EGA emulator for the Hercules graphics card?

I used to use a CGA emulator (don't remember which one it was), that could show some gfx even in EGA/VGA-only games (when I selected EGA mode). I remember my frustration seeing some garbled graphics ...
8
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1answer
422 views

Which computers used the Intel 82786 graphics chips, and what sort of commercial success did that chip attain?

In the late 1980's, Intel offered the 82768 graphics chip, with specific support for windowed environments. I remember it being covered in Byte magazine, but don't remember seeing any applications of ...
2
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1answer
124 views

Printing on the graphics screen with lowercase/uppercase letters using CHAR command in Commodore BASIC 7.0

The CHAR command in Commodore BASIC 7.0 on the Commodore 128 allows printing a text at a given position on the screen. Other than the PRINT command, CHAR also works in Hires graphics mode. Since the ...
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0answers
158 views

First GPU with thermal throttling

Pretty much the title - what was the first GPU that reduced clock speeds when it started to overheat instead of simply locking up? Bonus points for first Intel and AMD CPUs too.
4
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1answer
305 views

Hardware implementation of the isometric tile engine. Is it possible, did it exist?

We are talking about a hardware (and not software over hardware, as for example in some games on the SNES console) tile engine with multi-overlapping rectangular (rather than square, when the image ...
5
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2answers
619 views

Two graphics cards for retro gaming

I'm considering installing two graphics cards in my retro gaming setup (one AGP and one PCI) and was wondering if there are any drawbacks to doing so? The main things I'm thinking about are power ...
22
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4answers
4k views

Why was NEC able to wrestle PC graphics standards away from IBM?

The dominant standards for PC graphics in the 1980s were the ones introduced by IBM. This included MDA and CGA with the original IBM PC, followed by EGA shortly after the PC/AT, and then VGA with the ...
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3answers
4k views

Are pixels on the Commodore 64 square?

Are "tile pixels" the same size as "sprite pixels", and are they both square (ignoring the rule that multicolor sprites can only be colored in groups of two pixels)? By "square" I mean that the ...
3
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1answer
303 views

The Sentinel (aka The Sentry) on Commodore 64 - why was scrolling so fast?

On the Commodore 64 3D games which use one of the bitmap screen modes were notoriously slow. However watching a gameplay video of The Sentinel will show that in the first-person view, looking around ...
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2answers
2k views

How did most fifth-generation consoles avoid wobbly graphics?

According to Why do 3D models on the PlayStation 1 “wobble” so much? the PlayStation had a problem with wobbly graphics because Filling a triangle involves visiting every pixel within it and deciding ...
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2answers
2k views

What DOS games used Mode X as described by Michael Abrash?

In Michael Abrash's Graphics Programming Black Book, many chapters are dedicated to fast drawing of primitives, fills and copies using the 320x240 256-colour Mode X. What MS-DOS games used Mode X? ...
9
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1answer
943 views

Why did the PlayStation 2 implement backward compatibility that way?

It is well known that the PlayStation 2 implemented compatibility with the previous console by essentially incorporating a PS1 on a chip. The fact of backward compatibility is unremarkable as far as ...
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0answers
131 views

Annotated die photo of 3D graphics chip

I'm interested in how graphics hardware has worked at different tech levels. Having looked at an annotated die photo of the VIC-II for example, I now feel I have a much better understanding of how it ...