26 November 2016, 13:46 | #1121 |
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The board design is responsible. Some PPC cards are know for slow chip ram access. Apollo 1240 has/had fastest chip ram access. The new ACA cards may have the fastest chip ram access today?
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26 November 2016, 21:33 | #1122 |
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Thanks for the explaination. I want to check Blizzard 1230 IV chipram access speed compared to bare A1200. Does sysinfo do this?
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26 November 2016, 22:48 | #1123 |
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SysSpeed.
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27 November 2016, 01:22 | #1124 |
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Bustest might be worth a try.
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29 November 2016, 21:23 | #1125 |
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Just to be sure, is the Vampire 500 v2 board compatible with a A500+(Plus) model?
Sorry if this has been asked before. Ive searched but couldn't find a definitive answer to this. |
29 November 2016, 21:47 | #1126 | ||
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Quote:
Quote:
and ask majsta, brian or gunnar |
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30 November 2016, 15:15 | #1127 |
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Who owns the rights to the 680000 CPU and would it be possible to manufacture one with today's fab technology's (14nm etc.) at 1GHz? What would theoretically happen if you would plug in such a chip onto an A500 mainboard?
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30 November 2016, 15:41 | #1128 |
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Doing a standard 68000 in a modern 14nm etc process won't make it able to run at modern clock speeds. Apart from being limited by power which will help by going to a modern process, the maximum clock speed is also limited by the propagation delay in the digital gates inside the chip. What matters is the maximum delay from one input to an output. Newer processes will have faster propagation delays due to the gates and capacitances being smaller but not nearly that much.
My guess is that perhaps 68k could be taken to 100MHz before reaching the wall. To achieve higher clocks, you need to pipeline (parallelize) stuff which is what the Vampire team is doing. Doing stuff in parallel will make the maximum signal path shorter, thus enabling higher clocks. |
30 November 2016, 15:52 | #1129 |
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Even 100MHz is crazy fast compared to say 7MHz in an A500; that would be equivalent to a high and 486 part I'd guess, in terms of raw power?
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30 November 2016, 16:39 | #1130 |
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The latest 'real' 68000 can be clocked @50 MHz (overclocked but runs stable), it is available right now and it is not particularly expensive.
Here is a test with Zeus 68k running a 50 MHz 68000: http://apollo-core.com/knowledge.php...e=352&z=R4yAzw |
30 November 2016, 21:44 | #1131 |
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What's a genlock?
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30 November 2016, 23:01 | #1132 |
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If you remember the old days of analogue video signals and crt tvs you might appreciate that it was a practial issue how to sync video signals from say your Amiga with a different video source. A genlock made sure the signals were synchronized (or "locked" as in "generator locked") when you combined signals from different sources.
Skickat från min LG-H850 via Tapatalk |
30 November 2016, 23:17 | #1133 |
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A genlock superimposes the Amiga graphics on top of another video signal, such as for subtitling, channel logos or infographics.
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01 December 2016, 00:40 | #1134 |
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01 December 2016, 08:27 | #1135 |
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Have Two amigas connected via genlock and add that parallax scrolling in youre favourite game youve always wanted
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01 December 2016, 11:04 | #1136 |
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Thank you for the answers everyone, i now know what it is.
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01 December 2016, 21:08 | #1137 |
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02 December 2016, 00:35 | #1138 | |
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Quote:
I did not know about that one, cool, thank you, that's pretty neat! |
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02 December 2016, 00:54 | #1139 |
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02 December 2016, 02:23 | #1140 |
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