Difference between revisions of "Motherboard Pictures"

From The Dragon Archive
(Created page with 'Pictures of Dragon Motherboards to help with identification. SA/OKI boards appear from the schematic to be virtually identical and may be populated with either 8 half good 64K c...')
 
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Revision as of 21:27, 29 July 2010

Pictures of Dragon Motherboards to help with identification.

SA/OKI boards appear from the schematic to be virtually identical and may be populated with either 8 half good 64K chips mounted directly on the motherboard, or 16 x 16K chips, 6 of them on the motherboard and the remaining 10 on a patch board. This board seems to be the production version of the Pippin prototype, and was originally designed to be either a 16K board or a 64K board. The jumpers fitted just below the power connector at the top of the board are for routing the various voltages and control signals to the RAM chips depending on which sort are fitted.

8 x 64K board :

Example.jpg

16 x 16K board :

The most common variant of the Dragon 32 board is the MK II board, this board had 16 x 16K chips but had been re-designed to have all of the 16K chips on the main board.


16 x 16K MKII board :

One of the rarer boards was the Siemens board which was fitted with 8 x HYB4232, though in the example that I have for some strange reason these are double stacked, which sugests that they are like the 64K chips on the original board half good chips.

16 x 16K Siemens board :