Timex Sinclair Online User Group Meeting February 16, 2025

Date: February 16, 2025

Expansion Board for the ZX81: The 1560 Project

One of the most tantalizing announcements from the community is Carl Miles‘s ambitious project to create a comprehensive expansion board for the ZX81, tentatively named the “1560.” This board is designed to enhance the capabilities of the ZX81 significantly, catering to users who may not want to open their machines for internal modifications.

The 1560 expansion board aims to include:

  • 64K RAM Expansion: A substantial upgrade that allows users to utilize the full 64K RAM capacity, eliminating the need for a cumbersome RAM pack.
  • Joystick Support: Programmable key mapping for joysticks, allowing for a more versatile gaming experience.
  • Cartridge Ports: Enabling the use of various cartridges to expand the functionality of the ZX81.
  • ROM Replacement: Users will have the option to replace the existing ROM with custom versions.
  • Sound Capabilities: Incorporating the AY-3-8912 sound chip, bringing enhanced audio features to the ZX81.
  • Potential SD Card Reader: A feature that could facilitate easy data storage and retrieval.
  • RS-232 Port: Considering the addition of a serial port for further connectivity options.

Carl envisions a double-decker board design to accommodate all these features. This project is expected to take several months to complete, but the community is buzzing with excitement at the possibilities.

Addressing Audio Hiss in the Timex Sinclair 2068

In addition to the expansion board, Carl is also focusing on the Timex Sinclair 2068, specifically its audio output. Many users have reported an annoying audio hiss, and Carl plans to implement a stereo modification to address this issue.

His approach involves:

  • Socketing the Power Regulator Chip: To isolate the sound chip from the switching regulator, which is suspected to contribute to the hiss.
  • Testing the Op-Amp Isolation: By disconnecting the power supply portion of the 78S40 chip while retaining the op-amp section, Carl hopes to reduce unwanted noise.

This modification is a testament to the community’s dedication to improving the user experience and the quality of sound produced by these vintage machines.

Game of the Year (GOTY) Event for ZX Spectrum Games

Shifting gears, the annual Game of the Year (GOTY) event for ZX Spectrum games has evolved into a glamorous gala that celebrates the best in retro gaming. Joao Diogo Ramos shared insights about how this event has transformed from a simple online blog project into a prestigious ceremony.

This year’s GOTY event featured:

  • Live Broadcast on YouTube: Participants could tune in from around the world to witness the awards ceremony.
  • Red Carpet Experience: The event included a red carpet for game creators, adding a touch of glamour.
  • International Jury: A diverse panel of judges from various countries evaluated games across 12 categories.
  • English-Language Presentations: This year marked a significant improvement, making the event accessible to a broader audience.

The event garnered significant traction, with the latest broadcast already reaching approximately 1,000 views. This growth highlights the increasing interest in ZX Spectrum games and the community’s efforts to celebrate their rich history.

Documentary on Timex Portugal: A Historic Journey

Another exciting topic discussed was the documentary about Timex Portugal, which delves into the company’s history and its contributions to the computing world. Joao explained that the documentary highlights Timex’s collaboration with IBM and the development of its computer models.

Key points about the documentary include:

  • Mainstream Audience Focus: The documentary was crafted for a general audience, showcasing the significance of Timex’s work in Portugal.
  • Interviews with Former Employees: The film features stories from key individuals who played a role in the company’s history, providing a personal touch.
  • Challenges in Production: Joao discussed the lengthy process of bringing the documentary to air, emphasizing the commitment of all involved.

This documentary serves as a vital piece of history, shedding light on the legacy of Timex and its impact on computing in Portugal. It’s a must-watch for anyone interested in the evolution of technology.

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