vLA81 : A replacement for the Sinclair ZX81 ULA
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Enlarge Image - Category:
- Retro Computers >> Sinclair >> Sinclair ZX81 >> Components
- Listing type:
- Fixed Price Multiple Items
- Item Condition:
- New
- Seller location:
- Katikati, New Zealand
- Ending in:
- This listing is closed (20/04/2024)
Notify When Back in Stock - Quantity Available
- 14
- Latest buyer:
- a***7 (18)
- Fixed price:
- £25.00
- Shipping Costs:
- From only £3.00
- Payment methods:
- Paypal
- Number Sold:
- 165 (View history)
Buyer Value Date and hour Quantity bought a***7 (18) £30.00 05/04/2024 15:12:59 1 P***r (0) £25.00 02/04/2024 14:25:43 1 G***s (6) £25.00 02/04/2024 11:20:53 1 G***s (6) £31.00 02/01/2024 15:24:35 1 j***r (27) £31.00 22/12/2023 03:51:34 1 j***t (5) £31.00 28/10/2023 12:42:26 1 b***f (5) £31.00 15/09/2023 23:23:51 1 R***E (3) £31.00 31/07/2023 12:01:12 1 s***r (0) £31.00 29/07/2023 15:13:38 1 1***6 (8) £31.00 24/07/2023 14:14:46 1 3***d (6) £111.60 19/06/2023 17:36:41 3 t***k (1) £37.20 19/06/2023 00:18:24 1 c***s (2) £62.00 26/05/2023 15:07:40 2 t***z (0) £31.00 14/05/2023 22:14:11 1 F***o (5) £31.00 12/05/2023 12:34:22 1 f***c (4) £31.00 01/05/2023 18:22:31 1 L***5 (1) £31.00 28/04/2023 10:43:58 1 G***g (3) £93.00 12/04/2023 19:05:48 3 j***r (27) £62.00 11/04/2023 03:22:30 2 j***r (27) £62.00 11/04/2023 03:21:35 2 j***r (27) £62.00 11/04/2023 01:21:18 2 j***r (27) £31.00 04/04/2023 05:16:04 1 j***r (27) £31.00 02/04/2023 14:24:29 1 r***c (0) £31.00 01/04/2023 15:10:19 1 j***r (27) £31.00 31/03/2023 11:17:01 1 u***1 (10) £74.40 30/03/2023 09:00:36 2 a***s (9) £33.00 04/12/2022 22:22:52 1 J***t (2) £66.00 17/11/2022 14:36:52 2 m***m (2) £33.00 31/10/2022 17:51:20 1 w***r (1) £33.00 18/10/2022 14:59:16 1 J***2 (24) £26.00 16/09/2022 21:20:02 1 L***k (2) £26.00 11/09/2022 22:57:12 1 b***k (2) £26.00 09/09/2022 12:57:47 1 j***k (5) £26.00 01/09/2022 13:55:54 1 k***i (14) £52.00 05/08/2022 20:52:00 2 c***0 (2) £26.00 15/07/2022 23:57:36 1 d***r (6) £78.00 14/07/2022 04:18:18 3 v***m (0) £26.00 24/06/2022 18:42:06 1 x***u (0) £52.00 02/06/2022 21:51:12 2 s***r (10) £31.20 18/05/2022 16:37:38 1 O***n (3) £52.00 14/05/2022 01:32:59 2 a***8 (1) £31.20 01/05/2022 19:35:09 1 l***e (9) £31.20 26/04/2022 20:24:32 1 j***k (9) £26.00 17/04/2022 16:39:04 1 r***s (1) £156.00 15/04/2022 14:33:42 5 R***a (1) £26.00 12/04/2022 18:10:55 1 P***w (1) £26.00 12/04/2022 12:05:11 1 B***g (14) £25.00 03/03/2022 14:24:32 1 S***i (3) £24.50 04/02/2022 11:14:51 1 B***g (14) £24.50 03/02/2022 15:57:48 1 c***a (3) £24.50 02/02/2022 03:31:32 1 l***i (11) £24.50 27/01/2022 10:51:51 1 O***y (0) £29.40 25/01/2022 23:05:46 1 m***m (0) £24.50 16/01/2022 09:41:03 1 a***t (7) £24.50 09/01/2022 11:20:39 1 B***o (1) £24.50 23/11/2021 08:18:28 1 d***1 (2) £24.50 22/11/2021 15:30:53 1 L***o (1) £24.50 08/11/2021 06:04:09 1 S***s (26) £41.00 14/12/2020 23:06:35 2 1***6 (8) £20.50 11/12/2020 11:31:30 1 h***0 (1) £20.50 08/12/2020 14:35:44 1 d***t (3) £20.50 07/12/2020 07:42:26 1 T***e (0) £20.50 27/11/2020 08:21:45 1 p***s (9) £20.50 19/11/2020 20:51:01 1 t***y (1) £20.50 14/11/2020 07:55:18 1 M***y (3) £41.00 14/11/2020 07:39:28 2 j***4 (4) £20.50 27/09/2020 19:50:08 1 M***y (3) £20.50 27/09/2020 13:22:22 1 p***y (9) £20.50 18/09/2020 13:01:02 1 R***o (4) £20.50 12/09/2020 14:33:45 1 M***n (2) £20.50 10/09/2020 17:01:07 1 d***e (18) £20.50 05/09/2020 21:13:53 1 g***0 (3) £20.50 05/09/2020 14:21:37 1 j***4 (4) £20.50 05/09/2020 09:28:09 1 s***i (1) £41.00 05/09/2020 07:44:29 2 p***r (71) £20.50 05/09/2020 06:35:56 1 j***y (3) £18.95 21/02/2020 14:19:12 1 b***s (5) £18.95 10/02/2020 16:22:19 1 t***t (11) £18.95 03/02/2020 20:57:37 1 A***g (1) £18.95 31/01/2020 19:42:38 1 f***a (4) £18.95 30/01/2020 10:25:49 1 A***o (2) £18.95 27/01/2020 10:47:16 1 b***i (12) £18.95 11/01/2020 21:02:13 1 f***1 (11) £18.95 17/12/2019 10:32:44 1 B***7 (2) £18.95 30/11/2019 18:32:59 1 D***2 (2) £18.95 29/11/2019 09:24:11 1 A***o (13) £18.95 29/11/2019 00:39:02 1 c***9 (3) £18.95 22/11/2019 20:22:30 1 K***i (2) £18.95 19/11/2019 13:54:42 1 s***3 (6) £18.95 16/11/2019 17:13:17 1 1***6 (8) £18.95 14/11/2019 12:38:36 1 c***3 (1) £18.95 12/11/2019 22:08:39 1 S***h (3) £18.95 10/11/2019 00:35:55 1 r***d (2) £18.95 28/10/2019 13:30:26 1 a***a (12) £18.95 25/10/2019 23:01:53 1 a***o (11) £18.95 21/10/2019 08:31:45 1 g***f (13) £18.95 19/10/2019 09:18:40 1 T***6 (22) £18.95 15/10/2019 06:05:45 1 Z***d (4) £18.95 13/10/2019 09:22:30 1 S***9 (10) £18.95 06/10/2019 16:32:15 1 e***e (1) £18.95 30/09/2019 21:39:31 1 d***e (18) £18.95 30/09/2019 15:54:04 1 Z***e (2) £18.95 26/09/2019 09:24:33 1 T***n (2) £18.95 25/09/2019 14:54:49 1 b***a (46) £18.95 24/09/2019 21:14:52 1 j***1 (2) £18.95 23/09/2019 18:44:03 1 b***d (14) £18.95 22/09/2019 19:17:25 1 d***s (22) £18.95 21/09/2019 13:58:18 1 a***a (12) £18.95 21/09/2019 09:00:43 1 a***o (11) £18.95 20/09/2019 19:37:01 1 C***R (2) £18.95 20/09/2019 08:02:22 1 w***d (7) £18.95 19/09/2019 12:58:53 1 p***4 (27) £18.95 18/09/2019 13:25:57 1 z***o (9) £18.95 07/09/2019 23:24:17 1 f***1 (1) £18.95 06/09/2019 10:34:36 1 p***l (6) £18.95 03/09/2019 14:24:01 1 j***8 (15) £18.95 01/09/2019 12:48:27 1 d***h (26) £18.95 20/08/2019 00:20:50 1 1***K (131) £18.95 14/08/2019 22:56:03 1 L***n (64) £18.95 14/08/2019 20:05:17 1 P***s (84) £18.95 14/08/2019 16:39:53 1 n***l (9) £18.95 14/08/2019 15:52:01 1 p***o (6) £37.90 14/08/2019 14:52:10 2 A***g (1) £18.95 12/08/2019 10:20:34 1 d***2 (18) £18.95 11/08/2019 19:50:51 1 H***S (19) £18.95 11/08/2019 13:29:56 1 J***m (4) £18.95 11/08/2019 12:36:16 1 b***u (6) £18.95 10/08/2019 19:59:39 1 a***7 (18) £18.95 09/08/2019 11:04:44 1 j***r (3) £37.90 07/08/2019 22:31:10 2 b***i (12) £18.95 06/08/2019 21:19:38 1 a***s (9) £18.95 05/08/2019 15:32:50 1 K***k (72) £18.95 05/08/2019 07:39:31 1 h***h (2) £37.90 05/08/2019 07:06:30 2 a***a (73) £18.95 04/08/2019 17:36:30 1 F***p (39) £18.95 04/08/2019 17:09:13 1 F***l (7) £18.95 04/08/2019 12:17:13 1 J***3 (26) £37.90 03/08/2019 12:41:40 2 j***5 (2) £18.95 03/08/2019 12:32:24 1
Feedback on this Item
 Positive |
G***s (6) |
super fast shipping, all good, would buy more anytime Seller's Response Thanks for your support. |
17/01/2024 18:39:33 |
|
Positive |
J***t (2) | transaction impeccable | 17/07/2023 12:46:24 |
|
Positive |
m***m (2) | All OK Thanks | 09/11/2022 12:54:15 |
|
Positive |
J***2 (24) |
tutto ok Seller's Response Grazie per il vostro sostegno |
10/10/2022 20:28:14 |
|
Positive |
L***k (2) |
Just installed it. Perfect image!. Very happy with the result. Seller's Response Good to hear. Thanks for your support. |
23/09/2022 19:06:48 |
|
Positive |
s***r (10) | Great value, features and build quality. Thanks :-) | 09/06/2022 12:33:00 |
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Positive |
S***i (3) | All is OK, fast shipping, nice soldering. :] | 28/02/2022 16:25:06 |
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Positive |
d***1 (2) | Perfect ! Thank You :) | 27/01/2022 08:56:09 |
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Positive |
1***6 (8) | just perfect, thank you | 05/01/2021 15:43:23 |
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Positive |
M***y (3) | Produkt ist Super, Lieferzeit Okay. Danke | 16/01/2021 07:41:43 |
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Positive |
M***n (2) |
Fast shipping, excellent quality, thank you for this great development. Seller's Response Thanks for your kind comments and support. |
06/10/2020 10:29:28 |
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Positive |
j***4 (4) |
Work very well. My Zx81 Run again. Thanks Seller's Response Great to hear! Thanks for your support. |
27/09/2020 19:53:17 |
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Positive |
p***r (71) |
Great service, great product. Many Thanks Seller's Response Thanks for your support! |
29/09/2020 14:43:52 |
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Positive |
f***a (4) | Works very well. Very good product for replacing a defective ULA. Picture is sharp on a modern TV. | 09/04/2020 18:59:06 |
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Positive |
A***o (2) | The item arrived ok. Great seller | 02/03/2020 20:43:47 |
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Positive |
f***1 (11) | Perfect ! | 08/02/2020 19:23:40 |
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Positive |
1***6 (8) | just perfect, thank you | 05/01/2021 15:43:13 |
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Positive |
r***d (2) | I received the parcel in only one week! I needed time to prove it but it works perfectly. In my opinion an incredible product and a very good seller. | 14/11/2019 15:17:29 |
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Positive |
a***a (12) | Work fine, thank you! | 18/01/2020 10:25:03 |
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Positive |
Z***d (4) | Thx a lot for this item, arrived in Belgium without problems in perfect state !! | 28/10/2019 16:33:53 |
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Positive |
Z***e (2) | Correct trusted partner. I recommend to everyone. | 18/10/2019 09:06:48 |
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Positive |
b***a (46) | All ok! | 13/10/2019 19:04:38 |
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Positive |
b***d (14) | 12/10/2019 22:56:05 | |
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Positive |
a***a (12) | Great hw, perfect transaction | 20/10/2019 16:20:29 |
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Positive |
p***4 (27) | Great communication, excellent product. | 17/12/2019 12:31:35 |
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Positive |
1***K (131) | Excellent | 22/12/2019 11:11:50 |
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Positive |
L***n (64) | Excellent ULA. Works a treat. | 17/10/2019 13:40:30 |
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Positive |
P***s (84) | Very good replacement with very helpful extensions. The shipping time was shorter than expected. A pleasure to buy. | 12/11/2019 05:57:40 |
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Positive |
p***o (6) |
very ok , good working Seller's Response Thanks for the feedback! |
14/09/2019 19:35:30 |
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Positive |
H***S (19) |
Fast delivery, works great, nice product! Seller's Response Thanks for your support! |
29/09/2020 21:22:12 |
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Positive |
K***k (72) |
Great seller! Item as described and fast shipment. Seller's Response Thanks for your support! |
31/10/2020 16:49:33 |
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Positive |
a***a (73) |
Sorry for delay, wanted to use it before feedback. Packed well, amazing piece of kit, extremely well constructed, nice design. nice features. Thanks Seller's Response Thanks Andy! |
13/09/2019 15:06:41 |
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Positive |
J***3 (26) |
Perfect, works fine! Seller's Response Thanks for the feedback! |
01/09/2019 18:15:58 |
Item Number : 38492
Meet the seller
Bloodnok (225)
Feedback received in last 120 days :
184 times
- Positive: 184 (100%)
- Neutral: 0 (0%)
- Negative: 0 (0%)
Description
The vLA81 is a modern plugin replacement for the ZX81 ULA. It is one of several ULA replacements I have made for members of the Sinclair computer family including the vLA82 for the Spectrum 48K, the vLA128 for the Spectrum 128K (Toastrack) and +2 (Grey case) and the vLA1 for the Sinclair ZX Interface 1.
As they simply don't make ZX81 ULAs anymore, then unfortunately if the ULA has failed (and there's not much else on a ZX81 to fail), then options for repair are rapidly diminishing. The vLA81 provides a simple way to keep these icons of 80's computing going.
Apart from providing the functionality of both the earlier 2C158E/184 ULA (without back porch) and the 2C210E (with back porch), the vLA81 also has a few extras added.
vLA81 features:
- Fits within the same 40 pin DIL socket outline as the original ULA.
- Narrow IC pins for easy plugin ULA replacement. In most cases the existing socket will be OK (unless, of course, the existing ULA is soldered in).
- Provides the same functionality as the 2C210E Sinclair ULA by default.
- Video level selectable between standard video (suitable for direct connection to a 75 ohm monitor input) and high sync level (suitable for the modulator input or some video mod boards).
- Back porch on/off select.
- Internal 32K memory support (High or Low for the different hires schemes). Note that the M1NOT mod is not needed with the 32K internal memory. Existing M1NOT enabled internal memory will work fine with the default ZX81 memory mapping selected.
- Programmable user configuration gives access to:
- Inverse or normal video and choice of black or white border.
- 50/60 Hz video standard.
- Ability to map ram to the ROM space (write protect enable/disable – 32K internal ram required).
- Option - Configuration port socket on PCB base with external config switch.
- Tested with an extensive suite of ZX81 software.
- Ideal for preserving the original ZX81 ULA.
- Low power consumption.
Note: If you require the external configuration switch assembly then please let me know.
Whether you want to just get a faulty ZX81 back up and running, or want to extend the ZX81 with expanded memory and HIRES, the vLA81 can provide what you need.
Note: The socket for the External Configuration Switch is not included unless the External Configuration Switch option is purchased.
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Questions and Answers
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Shipping and Payment
- Item Location:
- Katikati, New Zealand
- Shipping conditions:
- Buyer pays shipping expenses
- Shipping Costs:
-
- To New Zealand :
- First Class Post : £3.00
- Courier : £5.00
- To EU :
- Airmail Post : £12.00 For initial item, £1.00 Per additional item
- To Europe (Non EU) :
- Airmail Post : £12.00 For initial item, £1.00 Per additional item
- To Americas (Non USA) :
- Airmail Post : £12.00 For initial item, £1.00 Per additional item
- To Rest of World :
- Airmail Post : £12.00 For initial item, £1.00 Per additional item
- To USA :
- Airmail Post : £12.00 For initial item, £1.00 Per additional item
- Shipment terms:
- Note: All orders are now shipped with a tracked service where available. Please inquire if confirmation is required.
Please ensure that your shipping address is correct in PayPal as orders can only be shipped to this address.
A maximum of 5 x vLA81 can be shipped for the listed shipping price. If more are required please contact me.
New Zealand customers please note that GST of 15% is not included. A separate invoice will be provided upon purchase. - Payment methods:
- Paypal
The seller accepts all responsibility for this listing
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