The vLA1 is a pin-for-pin functional replacement for the Sinclair ZX Interface 1 ULA using a modern programmable logic array. The vLA1 provides full support for the Microdrive, RS-232 and Sinclair Network as in the original ULA.
The vLA1 comes in a 40 pin DIL package suitable for soldering into the Interface 1 PCB. A word of caution, however, due to a lack of room within the Interface 1 case, the original ULA will need to be desoldered and the vLA1 installed in its place. There is simply not enough room for a socket. Have a look through the install guide (see the external documentation link elsewhere on this page) and you should get a good idea of what's involved.
The image gallery shows the vLA1 in place on the Interface 1 PCB. Note that the Interface 1 is not included in this offer.
Why did Charlie make it?
The original ULA has an unfortunate history of being prone to spectacularly overheat and fail without warning, leaving an unsightly crater in the Interface 1 plastic case. Because of this, and due to the original ULA now becoming hard to find, the vLA1 project was born.
What makes it special?
The original ULA functionality has been reverse engineered and is replicated in full.
Due to PayPal Policy, refunds will now be minus the payment fees.
If you order using fake details in order for someone to forward on shipping.
This will create severe issues with customs.
No refunds will be given.
Here at ZX Renew we love retro computing as much as you do. That's why we are passionate about bring you the BEST in high-quality replacement parts to keep your retro computing journey going into the future.
D01 - 000000
This site has been setup to facilitate users to be able to purchase aftermarket goods from suppliers at a value for money price point.
Although it looks like it is very professional it is only here to serve the retro community. I do this part time.
The aim of the site is to allow the renewal of retro computers, whilst not making a huge profit. We will try to keep it like that. Enough to keep it going.
If you have a product or service that you would like to make available to the community please do not hesitate to get in touch. The more the merrier.
Any feedback, positive or negative, is truly appreciated.