Search found 82 matches

by joefish
Thu Jul 05, 2018 4:23 pm
Forum: MiST
Topic: Dandanator on Spectrum core?
Replies: 6
Views: 627

Re: Dandanator on Spectrum core?

Surely if you're going to emulate any real hardware instant loader it would be the more popular DivIDE system?
by joefish
Thu May 03, 2018 12:12 pm
Forum: GFA BASIC
Topic: Game coding
Replies: 26
Views: 3351

Re: Game coding

MrPixel was here asking questions about coding but was ridiculed by lots of Atari users instead. The problem was he was asking non-Atari system coding questions.... in the chat and non-Atari system section of the forum. Seems legitimate and OK to do so as there is such sections.... but seems not so...
by joefish
Mon Apr 30, 2018 10:55 am
Forum: Games - General
Topic: Which games could be possible on our Ataris today ?
Replies: 31
Views: 5747

Re: Which games could be possible on our Ataris today ?

Midi hook-up multiplayer FPS. It wouldn't even need to be textured (although the ST does a passable Wolfenstein ), and the other players would be scaling sprites (lke Corporation , but not as atrociously slow). Or maybe a 2 vs 2 player team game over a serial link, with a split-screen on each machin...
by joefish
Wed Mar 28, 2018 9:57 am
Forum: Discussion
Topic: ST display ratio
Replies: 11
Views: 6168

Re: ST display ratio

Well, for a start, the alignment of the horizontal pixel rows with the scanlines on the TV is fixed in all cases. And secondly, not all the 625 lines of the PAL format are visible on a TV screen, which means the borders don't appear as big as they are in theory. But on the ZX Spectrum, the borders a...
by joefish
Tue Mar 27, 2018 1:45 pm
Forum: Discussion
Topic: ST display ratio
Replies: 11
Views: 6168

Re: ST display ratio

Yes, it's a bit of a shame they're not square. The ZX81 / ZX Spectrum / MSX-1 / Oric have square pixels with a 256x192 display which is exactly a 4:3 ratio. On a lot of CRT TVs, that meant that their pixels aligned perfectly with the dots on the TV screen (although this could drift over time with RF...
by joefish
Thu Mar 22, 2018 6:34 pm
Forum: Discussion
Topic: Atari Pixelart on Discord.
Replies: 4
Views: 2665

Re: Atari Pixelart on Discord.

Anyone interested in retro bitmap art needs to have a look at what some people have achieved on the ZX Spectrum, on http://zxart.ee For all its primary colour palette, 2-colours-per-character-cell limitations, some of the screens done recently are properly impressive. Take a look at MAC's reinterpre...
by joefish
Fri Mar 16, 2018 11:42 am
Forum: Coding
Topic: why use ASM anymore
Replies: 76
Views: 8960

Re: why use ASM anymore

Depends on the system. A compiled language like C/C++ is the best way to take advantage of modern multi-core systems as it can prepare your code to run in a whole range of multi-threaded ways; can make flexible links to a range of different software and hardware interfaces, etc. Any interpreted lang...
by joefish
Mon Feb 26, 2018 3:22 pm
Forum: Applications
Topic: "NEOLoad" Neochrome <-> Bitmap image converter
Replies: 25
Views: 7180

Re: "NEOLoad" Neochrome <-> Bitmap image converter

In fact, I do not use NeoLoad.exe, but if I have the guts, I would do a routine to load the 24-bit format in MI-9. And NeoLod.exe, is the only application I found that makes a mistake in the BMP 24-bits header. Does it? What does it do wrong?I have no control over the format - the code just uses so...
by joefish
Fri Feb 16, 2018 12:19 pm
Forum: News & Announcements
Topic: Paul Woakes
Replies: 13
Views: 4261

Re: Paul Woakes

Shame. Damocles was an incredible achievement.
by joefish
Fri Feb 16, 2018 12:18 pm
Forum: Discussion
Topic: Programmers Palettes
Replies: 8
Views: 7354

Re: Programmers Palettes

Ooh - always wondered how that palette came about, as it's a brilliant piece of work. But I wanted something smaller for bitplane playfields. Then I just happened to come across this - a DawnBringer 8-colour palette! http://lospec.com/palette-list/dawnbringers-8-color http://pixeljoint.com/forum/for...
by joefish
Mon Feb 12, 2018 12:17 pm
Forum: Games - General
Topic: ROBOCOP 2. Amiga or ST?
Replies: 8
Views: 3301

Re: ROBOCOP 2. Amiga or ST?

I hated the jump control too - I didn't like either version. Jonathan 'Joffa' Smith (Speccy programmer extraordinaire) once told me that he really didn't rate the programmer who worked on the ST version of Robocop 2 . It was a simple conversion based on the 8-bit Spectrum / Amstrad developments. Thi...
by joefish
Mon Feb 12, 2018 11:58 am
Forum: Games
Topic: Porting SOTB to the Falcon
Replies: 30
Views: 6461

Re: Porting SOTB to the Falcon

Yeah, I know nothing about playfields, so I'm just going to avoid this discussion by running away to the right...

by joefish
Fri Feb 09, 2018 3:40 pm
Forum: Games
Topic: Porting SOTB to the Falcon
Replies: 30
Views: 6461

Re: Porting SOTB to the Falcon

Surely it'd be a lot easier to do SotB in bitplane mode? The Amiga playfield graphics would port straight across.
by joefish
Fri Jan 19, 2018 3:50 pm
Forum: Coding
Topic: STE horizontal hardware scroll
Replies: 28
Views: 5480

Re: STE horizontal hardware scroll

Surely to horizontal scroll, the intention is that you set up a double-width screen and pan from one side to the other, filling in the same thing to both the leading and trailing edge of the viewport. Then when you reach the end of the pan, you jump back to the beginning because at that point both h...
by joefish
Fri Jan 19, 2018 3:30 pm
Forum: Chat forum [ENG]
Topic: Atarian intelligence test.
Replies: 52
Views: 6039

Re: Atarian intelligence test.

Ah, the old multiplication-precedence trick, and whether it applies to just computer languages or real-word mathematics...
by joefish
Wed Nov 22, 2017 12:16 pm
Forum: Applications
Topic: "NEOLoad" Neochrome <-> Bitmap image converter
Replies: 25
Views: 7180

Re: "NEOLoad" Neochrome <-> Bitmap image converter

I'm afraid I only looked up the format of the .NEO files. I didn't bother to research the .BMP format. I left that to the old Borland code library; I just call LOAD and SAVE on the image object in the display. You're right that for converting back to a .BMP it would be far more efficient to translat...
by joefish
Tue Nov 21, 2017 6:21 pm
Forum: Applications
Topic: "NEOLoad" Neochrome <-> Bitmap image converter
Replies: 25
Views: 7180

Re: "NEOLoad" Neochrome <-> Bitmap image converter

I did read a piece on how to do a 'Median Cut' to reduce a palette to 8 or 16 colours, but I don't know if it's worth adding. I know I'd much prefer doing the initial reduction to 320x200x16 colours myself in a separate paint package as most automated processes don't do a very good job.
by joefish
Tue Nov 21, 2017 5:53 pm
Forum: Applications
Topic: "NEOLoad" Neochrome <-> Bitmap image converter
Replies: 25
Views: 7180

Re: "NEOLoad" Neochrome <-> Bitmap image converter

Try this: http://railtron.com/files/atarist/NEOLoad_V1.3.zip After DropBox dropped support for XP on the desktop I gave up on it. I should probably fix this up and put it on the webspace I bought for myself, but the PC it's on went bang and I haven't got round to scraping the drives for anything use...
by joefish
Tue Nov 14, 2017 5:51 pm
Forum: Non Atari Platforms
Topic: Sotb better on Amstrad CPC + than on ST
Replies: 12
Views: 3152

Re: Sotb better on Amstrad CPC + than on ST

Byte me: https://demozoo.org/productions/156249/ :lol: That's still pretty impressive though, even with the extra chips added to the Amstrad. The lo-rez trees suggest to me massively expanded sprites, and I don't have the big red dragon and other stuff in mine. Though that's really just the tree lay...
by joefish
Fri May 12, 2017 3:50 pm
Forum: 680x0
Topic: How to Test Mouse Buttons in Assembler
Replies: 15
Views: 4136

Re: How to Test Mouse Buttons in Assembler

I haven't done it in years, but I seem to remember first you register an interrupt routine to respond to a signal from the keyboard chip. Then you send a BIOS message to tell the keyboard chip to operate the mouse in either 'absolute-position' or 'relative' mode. To read it, you use another BIOS cal...
by joefish
Wed Apr 19, 2017 10:48 am
Forum: Chat forum [ENG]
Topic: MANIC MINER vs CHUCKIE EGG - WHICH IS BEST?
Replies: 11
Views: 3488

Re: MANIC MINER vs CHUCKIE EGG - WHICH IS BEST?

Manic Miner, easily.
by joefish
Thu Nov 03, 2016 2:29 am
Forum: Coding
Topic: Horizontal Parallax Bitplane Scrolling Demonstration
Replies: 37
Views: 13181

Re: Horizontal Parallax Bitplane Scrolling Demonstration

Posting here the handful of sprites I've ripped from the Amiga version of Shadow of the Beast:

Image
by joefish
Wed Nov 02, 2016 5:52 pm
Forum: Coding
Topic: Horizontal Parallax Bitplane Scrolling Demonstration
Replies: 37
Views: 13181

Re: Horizontal Parallax Bitplane Scrolling Demonstration

Actually, those rips have been rescaled or something; there are far more different colours than in the actual sprites. These rips from the EU Megadrive version are very similar to the Amiga, though one or two colours have been added and the palettes altered. http://www.spriters-resource.com/genesis_...
by joefish
Thu Aug 25, 2016 7:12 pm
Forum: STOS
Topic: Shadow Of The Beast Parallax Demo STOS
Replies: 38
Views: 12770

Re: Shadow Of The Beast Parallax Demo STOS

Parallax in different strips is a completely different 'beast' to per-pixel transparency overlaid graphical layers though. Generally the 8-bit machines don't have the facilities to even attempt it. Though there have been some fairly clever tricks to give the illusion on systems with hardware sprite ...

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