Difference between revisions of "Motherboard Pictures"
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[[File:Dragon32_PCB_Top_(PC10087_Issue5).jpg|419px]][[File:Dragon32_PCB_Bottom_(PC10087_Issue5).jpg|404px]] | [[File:Dragon32_PCB_Top_(PC10087_Issue5).jpg|419px]][[File:Dragon32_PCB_Bottom_(PC10087_Issue5).jpg|404px]] | ||
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+ | '''16 x 16K MKII board (PC10087 Issue 5, 258x178mm) :'''<br> | ||
+ | Alternative version of the Issue 5 board with different factory markings | ||
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+ | [[File:Dragon32_PCB_Top_(PC10087_Issue5_Alt).jpg|400px]][[File:Dragon32_PCB_Bottom_(PC10087_Issue5_Alt).jpg|400px]] | ||
'''16 x 16K MKII board (PC10087 Issue 6, 258x178mm) :''' | '''16 x 16K MKII board (PC10087 Issue 6, 258x178mm) :''' |
Revision as of 00:58, 4 November 2017
Pictures of Dragon Motherboards to help with identification.
Contents
Pippin
Dragon 32 - Mark I
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.
16 x 16K board :
Always labelled (c) Dragon Data Ltd:
or (c) Dragon Data Services Ltd, Issue 2:
Here is another picture.
8 x 64K board :
Always labelled (c) Dragon Data Ltd, Issue 2
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 suggests that they are like the 64K chips on the original board half good chips.
16 x 16K Siemens board :
Always labelled (c) Dragon Data Ltd, Issue 2
Dragon 32 - Mark II
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. Always labelled DRAGON DATA LTD CPU UK 32K MKII with either Issue 5 or Issue 6
16 x 16K MKII board (PC10087 Issue 5, 258x178mm) :
Please notice the two extra resistors to the left of the MC6847 VDG that does not appear on the old picture.
16 x 16K MKII board (PC10087 Issue 5, 258x178mm) :
Alternative version of the Issue 5 board with different factory markings
16 x 16K MKII board (PC10087 Issue 6, 258x178mm) :
16 x 16K MKII board (PC10087 Issue 6 P/N 48127, 254x175mm) :
Seems to be the same as the other issue 6 board but manufactured on a different factory.
16 x 16K MKII board (PC10087 Issue 6 P/N 48127, 254x175mm) :
Another version of the board, with a P/N 48200 Issue 2 daughterboard.
Dragon 32 - Other
Dragon 32 board (P/N 41503, 254x203mm) :
This one seems to be a cleaner redesign of the Dragon 32 board, by PARC Electronics Ltd.
- Issue 2
- Issue 3
Dragon 64
British Dragon 64 Board (P/N CD41505, 258x200mm).
British Dragon 64 Issue 2A Board.
Here's another picture.
British Dragon 64 Board (P/N CD41505 Issue 3, 258x200mm) Dragon Data 1983.
Tano Dragon
The US Tano Dragon 64 motherboard, Part Number 48418/2. The Tano board is about the same size of a UK Dragon 32 board, as it didn't need the NTSC to PAL conversion circuitry.
Here is another picture (Note the wires in the bottom left are not normally there :) ).
Dragon 200
The Spanish Dragon 200 is the very same English Dragon 64 (P/N CD41505 Issue 3, 258x200mm), except for the power led connector on the lower left corner of the PCB.
Dragon 200E
Variant of the Dragon 200, with an extra character rom for lowercase letters and all spanish characters, and spanish keyboard.
Dragon Alpha
Dragon P/N 41514 Level 1 Alpha (with Daughterboard P/N 41520)
Dragon P/N 41514 Level 2 Alpha
Here's another picture.
Dragon Beta
Dragon Beta P/N41500 Issue A
The following pictures are courtesy of Richard Harding.