29 September 2015, 17:01 | #61 |
son of 68k
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29 September 2015, 17:16 | #62 |
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29 September 2015, 19:13 | #63 |
Phone Homer
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Where most games written in C rather than Asm for the x68000? Is there anyway you can do a all cpu no blitter version that would run on both Atari and Amiga?
What was the point of games being rewriten back in the day for 68k machines from scratch like the Atari ST and Amiga when they had already be written for 68k the x68000 |
29 September 2015, 19:31 | #64 |
J.M.D - Bedroom Musician
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@Boo Boo
I have the feeling is a mix of factor between resources (use a 030 like in falcon to run a game that runs on a 68000 in the original), rights (companies would not like other to reverse engineer their code), pride (japanese in the 90 still convinced to be the best plus the rights as above) and ignorance (i not even knew x68000 existed if was not for a computer mag - technopolis - that the father of a friend of mine brought back from Japan) - ah add greed (probably companies thought reverse engineering was more complex and less result-prone than rewrite the whole thing and they did want fast dough so no risk taken) |
29 September 2015, 19:45 | #65 |
Phone Homer
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The basic machine was 68000, if they were buying the license why not ask for the C source this was the development machine as I understand?
I guess the machince graphics is above the blitter. It seems some Euro games made there way to the x68000 xenon2. The x68000 adeverts have pictures of tutankhamun witch is one of the big Dpaint things. Also it would be cool to see Aros on the x68000 - I realy like this computer but I would miss all the independent games and I dont think it has many intresting apps. |
29 September 2015, 20:11 | #66 |
J.M.D - Bedroom Musician
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@Boo Boo
i throw hints at Falcon and x68k communities once in a while to port AROS but guess they are not interested |
30 September 2015, 18:24 | #67 | ||
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Quote:
I think that it would be easy to have a first version which would run on the Amiga as well (without graphics). The problem here is that I have no experience on the Amiga. Quote:
Porting games between MC68000 based systems mainly depends on how the graphics and sound routines can be replaced. This approach works well on the X68000 because the graphics system is quite simple. However, the Videl processor (16 bit colours and flexible graphic modes) on the Atari Falcon was really helpful for this task. |
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30 September 2015, 23:35 | #68 |
It's all in the reflexes!
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Hi Sascha ! You did a great port of Cho Ren Sha !
I spent quite some time playing Cho Ren Sha on my Falcon during my summer holidays. Anyway, there is a bug from time to time : an enemy ship that normally appears on the middle of the screen suddenly cross the screen from top to bottom at a lightning speed, it's so fast that it is impossible to dodge it so it results to an instant destruction of the player. And each time this bug appears, then when you exit the game, the screen becomes black. It's impossible to go back to the TOS. Did you ever experienced this bug ? |
01 October 2015, 17:15 | #69 | ||
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Quote:
Quote:
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02 October 2015, 06:33 | #70 | |
Code Kitten
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The true color mode and DSP can really make a difference if one is willing to spend the time needed to carefully parallelize work between the CPU and DSP. I guess we were lucky that Atari messed up the Falcon's CPU bus. |
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02 October 2015, 10:11 | #71 |
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The X68000 games porting experiment
Did they? It is 16 bit but at 16 MHz. The data cache also works on chip ram access unlike Amigas. Remember the stock 1200 is 32 bit but chip ram is only 7 MHz. "Chip" memory access is faster on a Falcon. 16 bit memory access is faster than a 1200. Just add on accelerator fast ram to both.
Last edited by frank_b; 02 October 2015 at 12:29. |
02 October 2015, 11:51 | #72 |
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It's yet a bit worse on the Amiga, because even if the AGA chip bus runs at 7 MHz, it's effectively only 3.5 MHz for the CPU and the Blitter, just like on OCS and ECS. Only the bitplane DMA ever gets any performance benefit from the 7 MHz bus.
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02 October 2015, 12:25 | #73 |
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Indeed. The Falcon is quite a bit faster here. It's also much faster on VGA displays.
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02 October 2015, 12:47 | #74 |
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02 October 2015, 15:20 | #75 | |
Code Kitten
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Yeah, I guess the Falcon's bus is not that messed up in the end. |
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02 October 2015, 16:40 | #76 |
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02 October 2015, 18:15 | #77 | ||
It's all in the reflexes!
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Quote:
Quote:
Anyway this bug appears only once in a while, I would say 10%-15% of the time so it's not that annoying after all. But I was wondering if it was a known bug. |
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02 October 2015, 18:19 | #78 |
It's all in the reflexes!
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Does it means that the Amiga Blitter runs at 3.5 Mhz ? (I always thought it ran at 7 Mhz)
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02 October 2015, 18:36 | #79 |
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02 October 2015, 18:38 | #80 | |
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Quote:
So far I've got no report on any bugs. Care to elaborate how I can reproduce the bug? E.g. how long do I have to play to observe it? |
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