Make this my favourite Brand New Sinclair ZX80 ZXpand+ Conversion Kit

Retro Computers >> Sinclair >> Sinclair ZX80 >> Hardware >> General / Add-Ons
Listing type:
Fixed Price Multiple Items
Item Condition:
Seller location:
Stoke-on-Trent, Staffordshire, United Kingdom
Ending in:
This listing is closed (17/02/2018)
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Quantity Available
Latest buyer:
c***t (30)
Fixed price:
Shipping Costs:
From only £4.20 or buyer collect
Payment methods:
Paypal, Bank transfer
Number Sold:
2 (View history)
Buyer Value Date and hour Quantity bought
c***t (30) £35.00 17/02/2018 01:03:36 1
A***l (1) £35.00 19/11/2017 05:51:15 1

Item Number : 27575

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This is the conversion kit for users who have purchased the ZXpand+ Interface and may wish to use it with a Sinclair ZX80 computer.


If you use the ZXpand+ with the ZX80, there are no hardware modifications required to the interface - however, you will need to reprogram the CPLD which means the interface cannot be used with the ZX81.

The ZX80 uses the ZXpand for loading and saving, plus 32K RAM.  Three new keywords are added to the ZX80 ROM (CAT, CONFIG and DELETE), so that means, you will need to open your ZX80 and swap the existing ROM for the new Flash EPROM chip provided.

The package therefore consists of the following:

  • Replacement Flash EPROM programmed with the enhanced ZX80 ROM (with the new keywords CAT, CONFIG and DELETE on the Z, L and P keys respectively).  Simply remove the existing ROM on your ZX80 (keep the ROM as this is very rare!)
  • ZXtend expansion cable (this goes between the ZX80 and the ZXpand interface, so that you can still get to the TV out socket).

Instructions on reflashing the ZXpand+ for use with the ZX80 appear at:

A Short video of the ZXpand interface in action (on the ZX81) appears at:


  1. ZX80 computers with internal RAM upgrades may not be compatible. Contact us for advice.
  2. ZX80 computers with the internal regulator bypassed will not work without a small mod to ZXpand+ Interface.

Youtube Video

Questions and Answers

Shipping and Payment

Item Location:
Stoke-on-Trent, Staffordshire, United Kingdom
Shipping conditions:
Buyer pays shipping expenses
Shipment fee:
  • To United Kingdom :
  • Collection in Person : FREE
  • First Class Signed For : £4.20 For initial item, £1.60 Per additional item
  • To EU :
  • Intl Signed For : £8.45 For initial item, £2.80 Per additional item
  • To Rest of Europe :
  • Intl Signed For : £8.45 For initial item, £2.80 Per additional item
  • To Americas :
  • Intl Signed For : £9.20 For initial item, £2.80 Per additional item
  • To Rest of World :
  • Intl Signed For : £9.40 For initial item, £2.80 Per additional item
Shipment terms:

Items normally shipped within 1 working day of payment being received.

The ZXpand interfaces will be sent using a tracked postal service.

Payment methods:
Paypal, Bank transfer

The seller accepts all responsibility for this listing

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