vLA82 - Spectrum 48K ULA replacement
vLA82 - Spectrum 48K ULA replacement
vLA82 - Spectrum 48K ULA replacement
vLA82 - Spectrum 48K ULA replacement
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vLA82 - Spectrum 48K ULA replacement

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The vLA82 is a modern plugin replacement for the Spectrum 48K ULA (type 6C001E-7 or earlier). It is one of several ULA replacements I have made for members of the Sinclair computer family including the vLA81 for the ZX81, 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 Spectrum ULAs anymore, then unfortunately if the ULA has failed, then options for repair are diminishing. The vLA82 provides a simple way to keep these icons of 80's computing going.

vLA82 Features include:

- Plugin ULA replacement. In most cases the existing socket will be OK but there are some which only support very small pins (please see the install guide for more information). A suitable turned pin socket is available as an option to purchase if needed.
- A low profile and 40 pin DIL footprint means that the vLA82 is designed to fit in a ‘rubber key’ ZX Spectrum case without further modifications.
- Provides the same functionality as the 6C001-7 Sinclair ULA.
- Passes standard ULA benchmark tests (floatspy, Brendan’s Diagnostic ROM etc.).
- Tested with an extensive suite of ZX Spectrum software.
- Compatible with lower ram replacement modules.
- Ideal for installing in an aftermarket Spectrum PCB without needing an original ULA.
- Low power consumption.

Whether you want to just get a faulty Spectrum back up and running, or need a ULA replacement for a new clone, then the vLA82 is exactly what you need.

Customer Reviews

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Customer Reviews

Based on 4 reviews
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R
Rabs
SPECTRUM + ULA replaced

Spectrum + with a failed ULA, replaced with the vLA82. Great product. Easy ordering and no problem with delivery. Easy to fit and works great.

A
Andrew Davidson
Works perfectly

Bought to replace a flaky original ULA on an issue 3 board. Easy drop in replacement. Works great - I've ordered another!

A
Attila
great product

hi, it's a great product for substituting the original ULA.
I had to make a modification at the oscillator output, because the low level of the 4MHz output signal is to high for closing the TR3 transistor: I put an 1N4148 diode serially with the R24 base resistor.

Note that the CPU clock output of the original ULA and vLA82 is open collector and that on issue 2 boards the diode, as descibed by Attila, is a mandatory modification. The diode is usually factory fitted but on some early issue 2 boards this may have been omitted.

The vLA82 clock output has the same electrical characteristics as the orginal ULA.

T
Tom
simply perfect

I ordered the vLA82 out of curiosity rather than necessity. It is beautifully designed, almost a shame that you won't see it after closing the case. It has practically the same footprint as the original ULA. You have to make sure your socket is clean and in a good condition to provide an adequate contact.

It works perfectly and the display is indistinguishable from a real thing. It is a MUST HAVE for everyone involved in speccy retro computing. Well done, Charles.

Tom

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