17 November 2007, 05:53 | #121 |
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it should be, but just double check m8y.
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17 November 2007, 06:02 | #122 |
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HN27C4000G Suitable?
How about this one is it suitable?
HN27C4000G http://www.alldatasheet.com/view.jsp...=HN27C4000G-10 http://cgi.ebay.com/Hitachi-27C400-U...QQcmdZViewItem TNX .-.-. |
17 November 2007, 12:32 | #123 |
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I have some 150ns 27C400s that don't work on my A1200. (~142ns or lower is needed, I guess some 150ns are still fast enough but not all)
I also have one official EPROM-version of KS 3.1 which is 120ns. 150ns is more than fast enough for 68000-based Amigas. |
17 November 2007, 15:08 | #124 |
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Looks like i got lucky with the AMD's i have..
Thanks for the heads up Toni |
29 November 2007, 08:43 | #125 |
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Eprom Compatabilty?
Hi again, does anyone know where I can see a list of which eproms are pin compatable with others?
For example I beleive you can use a 27c512 in place of a 27c256 by just programming half the chip, it will still read ok in a device intended for a 27c256? I am still looking into Amiga suitable eproms also. I see there are also 27c040 & 27c4001 eproms. Are these compatable with 27c400 that I now know will work with Amiga? I'm also looking for a cheap source of G4T5 GL-4 Germicidal UV tube for my old eraser. I ordered some from the USA but they turned up with 110V stamped on them and they won't stay fired in my eraser. So I assume I need some 220 / 240VAC versions? I also bought a `True USB Willem programmer' from MCU mall. The first one I received would not talk to my AMD Dual Core 64 Athlon 4000+ PC. The second one I bought from them will talk with the PC, but still seems kludgie with the results I get. Has anyone else had any experience with this burner? I am considering buying a TOP2049 USB Eprom programmer next. Can anyone shed any light on wether this is a good model or not? Also wether it will use the same style Willem daughter boards etc? TNX all! .-.-. |
12 December 2007, 12:04 | #126 |
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How about a Pic Micro?
How about a Pic Micro?
Would it be easier to make a daughter board and use a pic micro to emulate the eprom? Is that possible perhaps? .-.-. |
12 December 2007, 14:10 | #127 |
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Obviously 1:1 pin compatible 27C400 (27C800/27C160 with small modifications) is easier than designing and building a daughter board
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13 December 2007, 04:11 | #128 |
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How about 27c4100 ???
OK, TNX..
How about 27c4100 ?? I see someone selling these and they suggest they are 27c400 compatible? The whole part number is MX A9650 27C4100DC-12 The speed looks good at least! .-.-. |
13 December 2007, 09:03 | #129 |
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13 December 2007, 10:14 | #130 |
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27c4100DC-12 Look to be UV erasable???
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13 December 2007, 10:29 | #131 |
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Ok, perhaps both variants are available. (I have only seen some OTP 27C4100 datasheets. But whats the real difference between 27C400 and 27C4100? Both have identical pinout..)
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14 December 2007, 00:48 | #132 |
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Whats the difference?? Well ...
What's the difference?
The difference is that I have found a source for the 27c4100 's at a reasonable price and 120ns which should be fast enough. The 27c400 's however I was unable to locate. Thats all. .-.-. |
14 December 2007, 01:34 | #133 |
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@vk4qkp
ask the seller if they are re-programmable. this way you will know for certain, the last thing you want is OPT when you need EE LOL.. |
14 December 2007, 02:18 | #134 |
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Yep, I asked him and he assures me they are UV erasable.
There is a picture of them and they have the little UV window. The IC is also clearly marked with the correct part number. I've bought 6x for AU$22 inc postage. So pretty cheap. When they arrive I'll have a play and let everyone know how it went. I would have preferred to buy new, hopefully these are in good nick. The seller advertises as , in good condition no broken pins etc. He also advertises M27C160 *16M* These seem to be a 42 pin. I wonder whats involved to use these? Could one have two different kickstarts and a switch for example to switch between them? My next job is to find some images to play with. I have A3000 (Original ROM's that boot from hard drive for Kick image) A1000 (Original PAL, boots form disk for Kickstart) A600HD A500 .-.-. |
14 December 2007, 08:11 | #135 |
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You can have *four* (4x512K = 2Mx8 = 16megabits) Kickstarts in one 27C160 with simple switch. Check my CDTV post for some details
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14 December 2007, 10:03 | #136 |
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Stuff n things.
OK, I think I found your post. It has CDTV hack's and pictures.
Very interesting. I'll see how I go with the EPROM's I've ordered and I might play further from there. If anyone is interested I've also posted a thread with details on how to join an Amiga chat line. I'd be keen to chat with others and catch up on lots of stuff. Here is the thread. http://eab.abime.net/showthread.php?t=33639 I'm also interested in learning more about and possibly getting something called a Catweasel MK4 board. I think this will let me archive all the hundreds of C64 and Amiga disks I have here using a PC, Linux & normal 3.5 & 5.25" drives? .-.-. |
14 December 2007, 10:36 | #137 |
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I am about to make my own custom 3.9 roms, I am gonna include the os3.9 kickstart updates, and some blizkick modules.
I will also include a custom bootlogo blizkick module that a friend has coded, but what else are you guys including in your kickstarts? What is possible to include? It would be cool to be able to boot from a compact flash, is it possible? Please tell me what you have included, and what is possible to include. |
14 December 2007, 11:12 | #138 |
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CF booting is easiest to do from the IDE connector. I don't think anyone has gotten around to modifying cfd to be ROM'able or autobootable.
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15 December 2007, 06:18 | #139 |
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IDE on stock A500?
Speaking of IDE. Whats the easiest way to add an IDE connector for a hard drive to a Stock A500?
There are tones of A500's around. But they are fairly useless with out a hard drive. .-.-. |
15 December 2007, 14:46 | #140 |
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heres a link (thanks to Coze )
http://www.students.tut.fi/~leinone3/ide/ I have read else where that you can add to the ROM so your amiga can boot from CDROM too I am yet to make my own *custom* roms, been so damn busy, silly season and all that, but best to look up doobie ray |
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