21 May 2010, 11:09 | #1 |
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Adding an extra ram socket to apollo 1260
I were thinking of adding another ram socket for my apollo 1260 accelerator.
The only thing is that i'm using it in a desktop case and wondered if it would cause any trouble if i added the socket trough wires, so i could still fit it in the a1200 case. Has anyone attempted this before? |
21 May 2010, 11:15 | #2 |
Paranoid Amigoid
Join Date: Mar 2008
Location: Athens/Greece
Age: 45
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I don't think anyone tried it, but I can't see any reason not to work. Of course the wires should be kinda short to avoid noise in signals. Dunno only if you try you can know. It's a lot of trouble but if it works it should worth it
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21 May 2010, 11:25 | #3 |
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i guess its limitted how short it can be made if you want to get it out of the way.
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21 May 2010, 11:39 | #4 |
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Not a good idea, the read/write timing is probably critical... And it's important to have good contact, which can be frustrating.
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21 May 2010, 13:24 | #5 | |
Ya' like it Retr0?
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Hiyas Nikolaj
Quote:
I am afraid that by adding wires you will introduce three things... Noise Pickup, signal impedance and propagation delay. I am not saying its impossible, but with critically timed circuits like memory managemet these things become paramount. What is more concerning is speed of the CPU and Memory, its quite a struggle to find good memory that can keep up with 50mhz (syncronus with the CPU) and most of the times we shuffle back to half of that (asyncronus) 25mhz. Propagation Delays By introducing propagation delays this skew timing, imho making it difficult to even achieve operation at 25mhz. Signal Impedence Then we have signal impedence, - wire is a resistor, the longer the wire the greater the resistence becomes, its quite likely that you will lose signals when introducing lengths of wire. Noise Pickup Copper tracks can act as signal picks up, that is to say they can resonate with the exterior RF noise and collect enough energy to - Most tight circuits that rely on clean (sharp) signals and as such have filters / decouplers to reduce the effects of external RF and hence reduce signal pickup. By introducing lengths of wire you are creating an antenna array which converts elctromagentic radiation (external RF noise) into electrical current. Although this will be a weak its likely to enough to scramble the circuit in places thus making it inoperable. A While back... I thought about adding an extra SIMM socket on wires so that I could use my Apollo 060 in my Desktop with 64MB ram. I factored that 5cm (50mm) would be the maximum I could use.. Unfortinately 5cm is not enough to make any difference and runs to high a risk of RF interference. With that I decided that this was not going to be (atleast for me) Theres nothing stoping you from trying, But I do insist that are very carefull with what you do, as its possible to damage the memory controller by driving it too hard. |
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21 May 2010, 16:02 | #6 |
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And what do you think about this, Zetro ?
Last edited by Cosmos; 16 July 2011 at 18:12. |
21 May 2010, 16:25 | #7 |
Paranoid Amigoid
Join Date: Mar 2008
Location: Athens/Greece
Age: 45
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@Cosmos
Hahahaha man you're an unbelievable modder! I so much love seeing your work |
21 May 2010, 17:31 | #8 |
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... more to come...
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21 May 2010, 18:14 | #9 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
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22 May 2010, 14:47 | #10 |
The 1 who ribbits
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hehehe hardware on stilts
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