Make this my favourite SUPER External ROM 256KB ZX Spectrum 48KB/128KB; Testing, repairing, programming

Retro Computers >> Sinclair >> Sinclair ZX Spectrum >> Hardware >> General / Add-Ons
Listing type:
Fixed Price Multiple Items
Item Condition:
Seller location:
Karlovy Vary, Drahovice, Czech Republic
Ending in:
1 days, 03h:35m:17s
Quantity Available
Latest buyer:
c***k (0)
Fixed price:
US$35.35 Buy now!
21.00% VAT, Duty and handling fees may be payable on Price & Shipping on receipt
Shipping Costs:
From only US$4.00
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Number Sold:
7 (View history)
Buyer Value Date and hour Quantity bought
c***k (0) US$39.90 26/05/2021  12:51:38 1
v***0 (0) US$24.90 21/02/2021  13:22:14 1
u***x (17) US$34.90 05/01/2021  08:26:12 1
j***e (8) US$39.00 29/11/2020  20:11:14 1
s***n (7) US$39.00 02/11/2020  19:06:45 1
d***e (5) US$40.00 24/06/2020  15:29:00 1
c***4 (4) US$44.50 17/05/2020  14:48:00 1
Feedback on this Item
PositivePositive j***e (8) Excelente vendedor, de toda confianza. Todo perfecto. Muy buena comunicacion. 19/12/2020  07:42:39
PositivePositive s***n (7) Awesome item, will be really useful time and again. Thank you! 16/11/2020  11:42:52
PositivePositive d***e (5) Professional item, ready to work, solid, weel done. Rock solid packing! Well done! Thank you 23/07/2020  13:06:31
PositivePositive c***4 (4) works fine 23/06/2020  00:16:44

Item Number : 43145

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karlovarak (37) User Offline

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Fixed price: US$35.35
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Complete new 2021's version
SUPER ROM CARD 256KB; 48KB/128KB ROM support

Compatible with ZX Spectrum 48K, +, 128K, +2, Didaktik, ZX Nucleon 512KB
(+2A, +2B, +3 not supported)

Necessary device for your ZX Spectrum, ideal for repairing, function testing, programming!!

(Fully assembled and functional card)

I do not sell products to Russia, Belarus and Ukraine due to illegal copying of my products in these countries!


- Small size, compact design to directly fit into the ZX Spectrum bus connector
- Memory capacity 256KB
- Up to 12 optional 16KB ROMs in 48KB mode
- Up to 2 optional 32KB ROMs in 128KB mode
- Select ROM with rotary BCD DIP switch
- Latch register for bits D4-D7 to output port 32765d (128KB BASIC), bits D6 and D7 output to user port connector
- The full-through bus to the connector identical with the ZX Spectrum main bus connector
- NMI signal generator and push-button
- Blocking the memory function by external ROMCS signal
- Compatible with Spectrum 16K/48K/128K/128K +2 (grey)/Didaktik/ZX Nucleon 512KB
and other clones with standard Spectrum SYSTEM BUS connector (+2A/B/+3 not supported)

Full documentation to download here:

EPROM memory contains the following standard ROMs (depending on the position of the rotary switch):

48K ROMs:
0: Brendan Alford´s ZX Diagnostics 0.37d
1: Retroleum Diagrom 1.54
2: Fruitcake 128 RAM tester 2.10
3: Ratcopy Test-128-1
4: Felix Knyazev´s Test-512K (for ZX Nucleon 512KB)
5: Didaktik M 1992
6: BS-ROM 1.40 by Busy
7: standard ZX Spectrum 48KB
8: standard ZX Spectrum 48KB (Spanish version)
9: GROOT "New ZX Spectrum ROM Ready"
A: +4 ROM by Andrew Owen
B: Arcade Game Designer 0.1 by Jonathan Cauldwell

128K ROMs:
C: ZX Spectrum 128K +2
D: Pentagon 128K

E, F: ROM card disabled

Other memory content is available upon request.
The PCB may be random in color.

The device is now in the production stage and will be sent upon completion.


Questions and Answers

Shipping and Payment

Item Location:
Karlovy Vary, Drahovice, Czech Republic
Shipping conditions:
Buyer pays shipping expenses
Shipment fee:
  • To Czech Republic :
  • Special Delivery : US$4.00
  • To EU :
  • Airmail Post : US$12.00 For initial item, US$0.60 Per additional item
  • To Europe (Non EU) :
  • Airmail Post : US$12.00 For initial item, US$0.80 Per additional item
  • To Americas (Non USA) :
  • Airmail Post : US$15.00 For initial item, US$0.80 Per additional item
  • To Rest of World :
  • Airmail Post : US$15.00 For initial item, US$0.80 Per additional item
  • To USA :
  • Airmail Post : US$15.00 For initial item, US$0.80 Per additional item
Shipment terms:
Not specified
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The seller accepts all responsibility for this listing

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