Make this my favourite ROM EL-2364 FLASH EPROM Chips (replacement for 2364 ROM)

Electronic parts and connectors >> EPROMs
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Fixed Price Multiple Items
Item Condition:
Seller location:
Stoke-on-Trent, Staffordshire, United Kingdom
Ending in:
19 days, 20h:45m:19s
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Latest buyer:
L***i (1)
Fixed price:
£10.00 Buy now!
Number Sold:
15 (View history)
Buyer Value Date and hour Quantity bought
L***i (1) £10.00 30/12/2017 15:52:18 1
L***S (2) £10.00 31/05/2017 11:32:11 1
p***o (13) £10.00 03/05/2017 12:07:30 1
l***y (10) £40.00 30/01/2017 19:23:52 4
c***s (4) £10.00 04/09/2016 22:39:14 1
K***o (5) £10.00 15/02/2015 13:24:58 1
a***l (67) £10.00 17/07/2014 23:55:27 1
y***1 (7) £20.00 25/10/2013 21:02:29 2
a***6 (4) £10.00 28/01/2013 14:35:46 1
w***p (52) £20.00 10/01/2013 08:42:04 2
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From only £1.75
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Feedback on this Item
PositivePositive L***i (1) Easy to order with custom ROM-image and arrived fast! 18/01/2018 15:28:03
PositivePositive L***S (2) Many thanks. First class service, very helpful in programming chip. Quick delivery. Highly recommended. 07/06/2017 17:52:40
PositivePositive p***o (13) 31/08/2017 13:50:14
PositivePositive l***y (10) A great product shipped safely to New Zealand. It's fantastic to have gadgets like this keeping our old hardware going! 02/07/2017 22:00:55
PositivePositive a***l (67) Excellent trade. Item arrived promptly and very well packaged. Thanks. 17/11/2014 07:03:57
PositivePositive w***p (52) Very good seller 30/01/2013 10:58:49

Item Number : 2339

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These are Flash EPROM chips, in a special low profile carrier designed to replace the now defunct 2364 ROM chip, used widely in early computers, such as the Sinclair ZX80, Sinclair ZX81, Vic-20, Commodore 64 (Kernal, Basic and Character ROM), Commodore 1541 Disk Drive (DOS/Drive ROMs), and Timex-Sinclair TS1000 and TS-1500 computers.

The original 2364 ROM chip is a very unusual 24 pin ROM chip (8x8 Kbit) which can now only be programmed on very specialised EPROM programmers (due to the voltages required).  There was also a second chip, which could be used at a push (it was pinout compatible) - the Motorola MCM68764, although that chip too was discontinued many years ago.

NOTE: there was also a 28 pin version of the 2364 ROM (for example, the TMM2364P from Toshiba). Therefore ensure you need the 24 pin version (this was sold by Toshiba as the TMM2366P)!

The ROM-el 2364 Flash ROM replacement is extremely low profile, using about the same space as an original 2364 chip, whilst using a Atmel Flash chip (AT49F001AN) which can hold 1Mbit (128kB) of code. In addition, overflow addressing lines are available on the ROM-el to enable bank switching and other targeted ROM applications. 

You will need to make a convertor to program this in an EPROM programmer (the chips are supplied blank) - so you will need to make a AT49F001 to 2364 pinout converter, or we can program the chips with a ROM of your choice (please supply the binary) for an additional fee of £5.


Picture gallery

  • ROM EL-2364 FLASH EPROM Chips (replacement for 2364 ROM)

Questions and Answers

  • Question: How can bank switching be used?

    Posted by p***o (13) - 03/05/2017 01:31:18

    Answer: You have to cut some tracks - see the original project documentation at

  • Question: can you program the ROM EL-2364 Flash EPROM chip with the ZX81 ROM binary

    Posted by d***k (2) - 06/04/2016 15:10:38

    Answer: Yes we can do that - you would need to stipulate (by PM) which ZX81 ROM you prefer as there are several - cost is £5 extra

  • Question: Hi, could you program the EPROM with a diagnostic ROM for the IBM 5150 found at ?

    Posted by K***o (5) - 15/02/2015 11:43:14

    Answer: We can program the EL-2364 with any suitable ROM image - the problem is that there does not appear to be an original (2364) version of hte diagnostic ROM you refer to...

  • Question: can you program the ROM EL-2364 Flash EPROM chip with the ZX80 ROM binary.

    Posted by T***6 (20) - 09/02/2013 14:19:01

    Answer: Yes of course - that is not an issue - we would charge an extra £5 to cover flashing the original ZX80 ROM

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Shipping and Payment

Item Location:
Stoke-on-Trent, Staffordshire, United Kingdom
Shipping conditions:
Buyer pays shipping expenses
Shipment fee:
  • To United Kingdom :
  • First Class Post : £1.75 For initial item, £0.05 Per additional item
  • To EU :
  • Airmail Post : £2.80 For initial item, £0.10 Per additional item
  • To Rest of Europe :
  • Airmail Post : £2.80 For initial item, £0.10 Per additional item
  • To Americas :
  • Airmail Post : £3.60 For initial item, £0.15 Per additional item
  • To Rest of World :
  • Airmail Post : £3.80 For initial item, £0.15 Per additional item
Shipment terms:
Items normally shipped within 1 working day of payment being received - we are happy to combine orders to save postage costs where possible.
Payment methods:
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