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29 March 2010, 18:31
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#1 |
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Posts: n/a
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Simple 4/8MB RAM board mod
Hi,
I just wanted to let people know about an incredibly simple but incredibly useful mod I did to my Amiga 1200 yesterday! Of course just about everybody knows the problem with 8mb RAM boards for the A1200; that the PCMCIA slot is disabled when using the full 8mb and that a jumper must be set to '4mb mode' in order to use a network adapter or CF reader. Well I got fed up of having to open the case and switch the jumper everytime I wanted to transfer files from my PC so I decided to rig a switch to the outside of the case allowing me to do this. My RAM board is an Elbox 1208 which uses three header pins for the jumper settings: the top pin for 4mb and the bottom pin for 8mb with a common pin in the middle. So what I did was cannabalise a 3 pin PC motherboard header plug and wire it to a SPDT switch with the centre pin wired to the common pole and the other pins to the other poles. I then attached the switch to the outside of the case just under the floppy drive. Took about 2 hours to do and that is with my ropey soldering skills as well! Very basic but makes life alot easier! Please let me know what you think, will post some pictures soon. |
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29 March 2010, 19:04
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#2 |
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Registered User
Join Date: Nov 2009
Location: Blyth England
Age: 68
Posts: 786
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That's a handy little tip there TreacleWench, I only have a 4MB stick in my upto 8MB card but I would definitely use that idea if I ever upgraded to the full 8MB
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29 March 2010, 20:12
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#3 |
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Paranoid Amigoid
Join Date: Mar 2008
Location: Athens/Greece
Age: 45
Posts: 1,978
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Good mod mate. That is definitely a useful hack in order to be able to use the PCMCIA whenever you want or the whole memory on the other hand
 Cheers and gief some pics |
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29 March 2010, 20:17
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#4 |
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AmiBay MegaMod
Join Date: Mar 2007
Location: Manchester, UK
Age: 62
Posts: 1,163
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The simplest of ideas are usually the best... good one, mate....
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29 March 2010, 22:23
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#5 |
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Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,397
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Should be easy to cannibalise the tiny electronic circuit from Kickstart switchers which enables you to switch kickstart with nothing but a long reset or holding down left mouse during reset.
That way you need no switch on the case. |
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29 March 2010, 23:13
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#6 |
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Posts: n/a
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Thanks for all the comments, I especially like the kickstart switcher mod idea.
Here are some pics |
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29 March 2010, 23:51
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#7 |
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Registered User
Join Date: Sep 2009
Location: Norway
Posts: 1,711
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Good looking!
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30 March 2010, 00:53
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#8 |
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. . Mouse . .
Join Date: Jun 2005
Location: Nowhere
Age: 55
Posts: 1,792
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Nice mod TreacleWench.
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30 March 2010, 07:45
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#9 |
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Guessing my way round
Join Date: Dec 2009
Location: England
Posts: 159
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good thinking, Batman
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