xxl Posted November 23, 2007 Share Posted November 23, 2007 hi, zx spectrum port: http://atari.pl/jsw.rar Quote Link to comment Share on other sites More sharing options...
twh/f2 Posted November 23, 2007 Share Posted November 23, 2007 hi, zx spectrum port: http://atari.pl/jsw.rar Don't forget the fantastic soundtrack ... was it the same with the Speccy version? Quote Link to comment Share on other sites More sharing options...
Tezz Posted November 23, 2007 Share Posted November 23, 2007 hi, zx spectrum port: http://atari.pl/jsw.rar Brilliant to see this one done next! the Spec version had no good music BTW thw/f2 ... yea it would be very good to add the Atari Robb track if possible to this conversion! Quote Link to comment Share on other sites More sharing options...
xxl Posted November 23, 2007 Author Share Posted November 23, 2007 > was it the same with the Speccy version? yes, engine can drive any zxspectrum jet set willy version (not jet set willy II). Quote Link to comment Share on other sites More sharing options...
xxl Posted November 25, 2007 Author Share Posted November 25, 2007 http://atari.pl/jsw1.rar jsw130 done, no sound time to debug / 64k version Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted November 25, 2007 Share Posted November 25, 2007 (edited) Any screenshots? Edited November 25, 2007 by walter_J64bit Quote Link to comment Share on other sites More sharing options...
xxl Posted November 25, 2007 Author Share Posted November 25, 2007 (edited) ech, i post avi, but if you prefer jpg... Edited November 25, 2007 by xxl Quote Link to comment Share on other sites More sharing options...
Rybags Posted November 25, 2007 Share Posted November 25, 2007 Is it running under an emulation engine, or has someone gone to the trouble of actually porting the code? Quote Link to comment Share on other sites More sharing options...
xxl Posted November 25, 2007 Author Share Posted November 25, 2007 it is port like jetboy (jetpac) - not emulation. i rewrite to 6502 zxspectrum jet set willy (fixed). Quote Link to comment Share on other sites More sharing options...
Tezz Posted November 25, 2007 Share Posted November 25, 2007 it is port like jetboy (jetpac) - not emulation. i rewrite to 6502 zxspectrum jet set willy (fixed). Once again, fantastic work, I read about the progress of G n' G on the atari.pl forum too. All of your work is a very impressive achievement. Bravo xxl. Quote Link to comment Share on other sites More sharing options...
xxl Posted November 25, 2007 Author Share Posted November 25, 2007 test version http://atari.pl/jsw.obx - 64kb Quote Link to comment Share on other sites More sharing options...
_Fandal_ Posted November 25, 2007 Share Posted November 25, 2007 test version http://atari.pl/jsw.obx - 64kb Your work is simply unbelievable! Respect!!! F. Quote Link to comment Share on other sites More sharing options...
Allas Posted November 27, 2007 Share Posted November 27, 2007 Really nice to see Spectrum 48 portings. They looks and feel nice, and with a little help of PMs and sound will look fantastic. Quote Link to comment Share on other sites More sharing options...
Chrodegang Posted November 27, 2007 Share Posted November 27, 2007 Nice work! @XXL: do you think it would be possible to port Last Ninja 2 from Spectrum to Atari 8-bit? Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 27, 2007 Share Posted November 27, 2007 i am really not a fan of the gr.8 games but well... but i expect to have some classics: - sabre wulf - Elite! (finally... ) - Ghost 'n Goblins - TLN-series what else? Quote Link to comment Share on other sites More sharing options...
emkay Posted November 27, 2007 Share Posted November 27, 2007 i am really not a fan of the gr.8 games but well... but i expect to have some classics: - sabre wulf - Elite! (finally... ) - Ghost 'n Goblins - TLN-series what else? Well, "Gr.8" games only can look like some hued monochrome..... but some clusters with different colour chosing may look a bit better. The Screenshot is theoretically possible by only setting some DLIs and using one player for an overlay of the "Hero" bitmap. ... Quote Link to comment Share on other sites More sharing options...
Chrodegang Posted November 28, 2007 Share Posted November 28, 2007 (edited) The Screenshot is theoretically possible by only setting some DLIs and using one player for an overlay of the "Hero" bitmap. Looks nice, but in real game technically not feasible. Why? There are scenes in the game where a lot of big sprites have to be moved (Ninja plus 2 opponents and extra weapons). I think, Atari just isn't fast enough to handle all these sprites and collision detection in hires without utilizing players and missiles that you are currently using to generate extra colors. I am wondering if a playable conversion of LN2 would be possible at all (even in b/w-hires or lower resolution). Any other opinions? Edited November 28, 2007 by Chrodegang Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 28, 2007 Share Posted November 28, 2007 emkay... this version i would not count as mono gr.8 game... but for panels etc should be possible... but i am not sure if for the game area how the overlays work as isn't there any clipping/masking necessary? but even used only for the panel it looks worth to do... chrodegang... speccy should be able to handle the sprites and atari not? well... Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 28, 2007 Share Posted November 28, 2007 and check out http://www.ciunga.it/jxspeccy/ there are really some nice games still to go for conversion... Quote Link to comment Share on other sites More sharing options...
Chrodegang Posted November 28, 2007 Share Posted November 28, 2007 chrodegang... speccy should be able to handle the sprites and atari not? well... Software sprites to be used here usually eat up a *lot* of cycles. Speccy is clocked at 3.5MHz, Atari at 1.79MHz. I am not sure, if 1.79MHz are sufficient for all the calculations (masking, collision detection, music, gameplay, etc.). It would be really great to hear XXL's opinion. Quote Link to comment Share on other sites More sharing options...
emkay Posted November 28, 2007 Share Posted November 28, 2007 (edited) The Screenshot is theoretically possible by only setting some DLIs and using one player for an overlay of the "Hero" bitmap. Looks nice, but in real game technically not feasible. Why? There are scenes in the game where a lot of big sprites have to be moved (Ninja plus 2 opponents and extra weapons). I think, Atari just isn't fast enough to handle all these sprites and collision detection in hires without utilizing players and missiles that you are currently using to generate extra colors. I am wondering if a playable conversion of LN2 would be possible at all (even in b/w-hires or lower resolution). Any other opinions? This time I am lucky to have a provement for my "ideas" ... since the conversion of Jetpac http://atari.fandal.cz/detail.php?files_id=5634 The game is using several DLIs, players and missiles for colour enhancement and it moves more objects than TLN would need. Actually.... during some limits on the speccy the original Jetpac doesn't have music, the ATARI Version plays music during gameplay.... and there are no slowdowns. Edited November 28, 2007 by emkay Quote Link to comment Share on other sites More sharing options...
emkay Posted November 28, 2007 Share Posted November 28, 2007 chrodegang... speccy should be able to handle the sprites and atari not? well... Software sprites to be used here usually eat up a *lot* of cycles. Speccy is clocked at 3.5MHz, Atari at 1.79MHz. I am not sure, if 1.79MHz are sufficient for all the calculations (masking, collision detection, music, gameplay, etc.). It would be really great to hear XXL's opinion. The 3.5MHz for the Zilog are very needed. It has some good memory saving commands, but the commands need more cpu cycles. With optimized code, the ATARI easily can be faster than the Z80 inside the speccy. Quote Link to comment Share on other sites More sharing options...
emkay Posted November 28, 2007 Share Posted November 28, 2007 for some demonstration purpose: Quote Link to comment Share on other sites More sharing options...
emkay Posted November 28, 2007 Share Posted November 28, 2007 There are some real benefits, when using hires (some may name it "bad" but its only "in the eye of the observer" ) a) when changing one colour, you have two colours changed b) one can change colours "everywhere" without taking care about the border which still has it's own colour. .... and .... maybe.... : If still some cycles are free, midline changes still can be done... ingame... Quote Link to comment Share on other sites More sharing options...
Chrodegang Posted November 28, 2007 Share Posted November 28, 2007 This time I am lucky to have a provement for my "ideas" ... since the conversion of Jetpac In LN2 you have to deal with *overlapping* of sprites. I don't see such overlapping sprites in Jetboy. The 3.5MHz for the Zilog are very needed. It has some good memory saving commands, but the commands need more cpu cycles. With optimized code, the ATARI easily can be faster than the Z80 inside the speccy. The Z80 takes 11 clocks for a 16-bit addition; the popular 6502 needs around 20 cycles to do the same thing using 8-bit operations. Using "typical" clocks of 4MHz versus 1MHz respectively (i.e. similarly fast memory chips), this translates into the Z80 being approximately seven times as fast as the 6502 for this particular operation (20/(11/4) ≈ 7). (Wikipedia http://en.wikipedia.org/wiki/Zilog_Z80 -> Notes and references 6) Do you have exact numbers for your claims? Quote Link to comment Share on other sites More sharing options...
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