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drpeter

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Everything posted by drpeter

  1. A PAL version for those who prefer their clouds & mountains grey 😉 36 colours drpeter_Colorado_grey.xex
  2. I suspect it would be adjudicated against the rules, but if not, my luxury would instead have been an internet-connected PC running Altirra... 😀
  3. OK- revised list! MAC/65 - together with BASIC will be able to create most applications I need, given long enough Star Raiders - never palls, despite having achieved Star Commander Class 1 Necromancer - determined to complete this, never have, love the unique gameplay Enchanter - need at least 1 Infocom that I haven't tackled yet M.U.L.E. - endless replayability and a rare chance to play against 3 computer opponents Chessmaster 2000 - I believe this was the strongest program released for the 8-bit Ataris The Last Word - to write my masterpiece Rambrandt - to indulge my artistic streak Book: Altirra Hardware Reference Manual Luxury: Incognito (I'd be using an Atari 800) with several GB CF card. No-brainer.
  4. MAC/65 - together with BASIC will be able to create most applications I need, given long enough Star Raiders - never palls, despite having achieved Star Commander Class 1 Necromancer - determined to complete this, never have, love the unique gameplay Bureaucracy - appeals to my sense of humour and will make me glad to have escaped civilisation M.U.L.E. - endless replayability and a rare chance to play against 3 computer opponents Chessmaster 2000 - I believe this was the strongest program released for the 8-bit Ataris The Last Word - to write my masterpiece Grph2fnt - to indulge my artistic streak Book: Altirra Hardware Reference Manual Luxury: Incognito (I'd be using an Atari 800) with several GB CF card. No-brainer.
  5. You have to be careful with SCART because the connector has so many pins, catering potentially for any combination of analogue inputs (audio, composite video, RGB component video, S-video), that many cheaper connectors and cables are only wired to output/carry/receive a subset of the possible signals
  6. This sounds plausible, but there's a problem to a simple automated conversion by colour-mapping- in the kernel, sometimes by chance the same register & value end up saved sequentially to both a colour register and a player horizontal position... Happens more often than you might think!
  7. In the original picture I was working from, the mountains are blue-grey, as one would expect- distant objects will always take on a desaturated bluish tinge due to atmospheric effects. Since the Atari can't render the correct colour, it's rather a matter of artistic preference whether they look better deep blue or grey. You can see a similar difference in the rendition of the clouds, which in my version include the blue-purple tints of the original image, but are rendered to greys in a8isa1's. Similarly, it's a matter of preference whether you like the all-over-golden landscape of a8isa1's NTSC version or the green-and-gold of my PAL version- which is closer to the image I was working from. I don't know whether the colour balance, temperature and saturation of the image a8isa1 was working from were the same as the one I found to work from. Personally I like both versions equally. I wasn't trying to replicate the appearance of a8isa1's rendition. That's part of the beauty of this tool- it allows expression of a wide variety of artistic preferences even when starting from exactly the same image- as well-demonstrated by the very different interpretations of miker's picture.
  8. That's a beautiful image. Here's a version for those with PAL hardware 37 colours drpeter_Colorado.xex
  9. Another World OK, here's my interpretation of miker's picture. I did a similar crop to Stephen, with the goal of retaining the 4 main compositional elements- the 2 figures, the beast and the moon. I aimed to retain the feeling from the original of wandering through a desolate and dangerous alien landscape. In pre-Rasta-processing, I played with level curves to achieve some contrast in the moon area of the picture and boosted saturation to bring out flesh-tones in the figures. I used Altirra palette, ciede pre-process colour distance, yuv rendering colour distance. I used floyd dither value 0.1, contrast 20, gamma=0.9 for the Rasta pre-process. I set a details mask with value of 5 for the 2 figures and the beast. 69 colours drpeter_AnotherWorld.xex
  10. And 10 FOR F=34520 TO 34580: PRINT CHR$(PEEK(F));: NEXT F will print out the copyright message for the Monkey Wrench XL cartridge
  11. 10 FOR F=38312 TO 38375: PRINT CHR$(PEEK(F));: NEXT F will print out the copyright message for the original Monkey Wrench cartridge
  12. Or more specifically 10 FOR F=34525 TO 34589: PRINT CHR$(PEEK(F));: NEXT F will print out the copyright message for a Monkey Wrench II cartridge
  13. In any case, printing out the contents as suggested before will almost certainly turn up some text identifying what it is.
  14. I'm betting it's a Monkey Wrench hybrid 16K cartridge...
  15. That's correct for Turbo Basic 1.4 on a 48K system- because it doesn't 'hide' much of its code in the RAM 'behind' the XL OS like Turbo Basic XL can on 64K systems. Consequently, along with having loaded DOS, it uses ~24K of the 48K of 'exposed' RAM.
  16. Well, I do agree with everything Gunstar & Stephen have said. It's going to be a bit of a challenge to render something that's both a quality Rasta image and has something of a feel of the original- not something I would have ordinarily attempted. But, since Gunstar has thrown down the gauntlet and Stephen has picked it up- I'll have a go 😀 Meanwhile, image to go with this post: Mickledore 41 colours Another classic English Lake District view- being the high pass between England's 2 highest peaks- Scafell (ahead) and Scafell Pike (behind). The route to Scafell ahead appears straightforward but is in fact blocked by a small near-vertical cliff of slabs and steps-Broad Stand- that is at once oh-so-tempting, technically difficult and perilous in either ascent or descent. Injuries, ignominious rescues or even fatalities regularly await those too foolhardy to divert tamely left to Foxes Tarn- or right via the hair-raising West Wall Traverse to the top of Lord's Rake- visible here as the small notch on the skyline just to the right of the false summit of Scafell. drpeter_Mickledore.xex
  17. Turbo BASIC XL has a slightly cut-down version which runs on 400/800- Frost BASIC 1.4, which was later named TURBO-BASIC 1.4
  18. Sorry, it's just the foreground SETCOLOR 1,x,x (sets luminosity of foreground only, colour value ignored) and the background SETCOLOR 2,x,x (sets colour for both foreground and background plus luminosity of background). You can get extra colours and/or shades of grey into GR.8 screens a number of ways- using player-missile graphics (=Atari's hardware sprites), mixing GR.8 screens with more colourful modes using custom display lists (the programs which tell Atari's graphics processor- ANTIC- what graphics mode to display on different parts of the screen), changing the screen colours on-the-fly while the screen is actually being drawn (display-list-interrupts and/or screen kernels), screen-buffer flipping etc. but these are all moderate or advanced programming techniques, partcularly if using Atari's native BASIC which doesn't offer direct support for any of them.
  19. Could this be something to do with the BASIC cartridge or cartridge slot itself?? It sounds as if this BASIC cartridge has been modded to/is behaving like a 16K cartridge? This was sometimes done to for example include MonkeyWrench (originally a Right Cartridge BASIC enhancement) and BASIC into one 16K Left cartridge... Any sign that the cartridge has been modded? It would be interesting to run the following to see if there is data in memory between $8000-$9FFF (Right Cartridge memory bank) when BASIC is inserted: 10 FOR F=32768 TO 40959: PRINT CHR$(PEEK(F));: NEXT F This should fill the screen with 'random' characters if there is data/code in this memory range. What does FRE(0) report with a disk-based BASIC such as Turbo-Basic XL?
  20. Kobe Bryant 1978-2020 drpeter_KobeBryant.xex
  21. Christopher Lee 29 colours drpeter_Lee.xex
  22. In the end, there's no way to fairly compare them. They're all different animals. It's like comparing a Ferrari with a Jeep. Depending on what you want them to do, either could be faster, better or more fun. Even a ZX Spectrum will be able do some things better than an Atari 800. Just love the one you're with and don't worry about the rest :-)
  23. Kilimanjaro 45 colours drpeter_Kilimanjaro.xex
  24. Pikachu This is an Australian golden possum, a rare mutation which turns the usually-brown coat golden, producing an uncanny likeness to everybody's favourite Pokemon- Pikachu drpeter_Pikachu.xex
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