Acorn ANC04 Z80 2nd processor

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 Acorn Z80 2nd processor box

Acorn Z80 2nd processor (front and top) 

 Acorn Z80 2nd processor (right)

 Acorn Z80 2nd processor (back)

 Acorn Z80 2nd processor (bottom)

Acorn Z80 2nd processor with top cover removed 

 Acorn Z80 2nd processor circuit board (top)

 Acorn Z80 2nd processor circuit boad (bottom)

Back in the early '80s I had a Torch Z80 disc pack with my BBC B so I didn't bother with the Acorn Z80 2nd processor, this example was bought off ebay in November 2001. The Z80 2nd processor has a 6MHz Z80 processor with 64KB memory, it ran CP/M 2.2.

The Z80 2nd processor came with a generaous range of software including:

• MemoPlan - a word processor
• FilePlan - a personal database
• GraphPlan - a spreadsheet and graphics program
• Accountant - an integrated accounting program
• Neucleus - a system generator to develop your own software
• BBC BASIC (Z80) and Professional BASIC
• CIS COBOL with Animator and Forms2

 Here is the Acorn brochure describing the Z80 2nd processor.
 
The pictures show:

1. The Acorn Z80 2nd processor box, it is far from mint, but in quite good condition for its age.
2. The Z80 2nd processor front and top, showing quite heavy discolouration, i think from sunlight rather than nicotene.
3. The right side the the Z80 2nd processor (the left is the same.
4. The back of the Z80 second processor showing the power in, fuse and on/off switch
5. The bottom of theZ80 2nd processor showing the ribbon cable connector to the BBC B's TUBE interface and the serial Number (04-ANC04-105415)
6. The Z80 2nd processor with the top cover removed, showing the +5v psu in the front and the Z80 circuit board in the middle.
7. The Z80 circuit board with the Ferranti TUBE ULA next to the ribbon cable, the Z80 CPU is in the middle of the board.
8. The bottom of the Z80 circuit board.

A HiRes version of the Z80 2nd processor circuit board is available HERE .

The Z80 second processor User Guide is available HERE.
Here are the Z80 second processor Function Key Cards.
The Z80 second processor Service Manual is available HERE .

In June 1984 Acorn User published a review titled 'Z80 Business Bundle '.
In April 1985 Acorn User published a comparative review titled "Can the ZEP100 zap the Acorn Z80"