I canīt believe itīs not the downloads!

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Here are some files you will require if you intend to make your own +D clone:

• The +D firmware, a 32K byte eprom image suitable for blowing.

The +D actually uses its 32K eprom as an 8K eprom, so the image contains 4 identical copies of the +D firmware. It may be that Miles Gordon bought a job lot of faulty 32K roms, and then sorted out those which were OK in the area 16K->24K, because this is the area that is actually addressed, A14 being connected to +5V and A13 to ground. The design is easily modified to use an 8K eprom if available. To this end the ZIP also contains a suitable 8K image.
• The Protel board database file containing the schematic and PCB layout.

The file contains the modified PCB files correcting the initial mistakes detailed on the story page. I have not yet made any boards using these files, but Iīve checked them as carefully as possible, and I believe they are OK.
• The corrected +D clone schematic as a GIF file.

Note: C15 is not present on the original +D, and was recommended by my more electronic friends.
• The PCB layout exported as Autocad file for those without Protel.
• The PAL files required for the design.
• The +D manual.
• The +D boot disk, in IMG format

May be written to a real 720K disk using Realspec from Ramsoft. Includes some demos to get you going.