AMYVIDHYBRID+FBAS: Adding Color Composite Video to Classic Amigas

The AMYVIDHYBRID+FBAS is a modern hardware project designed to enhance classic Commodore Amiga computers by addressing a key limitation of their original design: the lack of color composite video outputs. While the legendary Commodore 390229-03 Video Hybrid (also known as the VIDIOT) was essential for analog RGB output, it did not provide proper color composite or Y/C (S-Video) signals. The AMYVIDHYBRID+FBAS solves this issue, enabling Amiga enthusiasts to enjoy vibrant composite video and Y/C outputs on modern displays.

The Original Limitation: No Color Composite Output

Many classic Amiga models, such as the A500, A500+, A1000, A1500, A2000, and A3000, relied on the Commodore 390229-03 Video Hybrid for video output. However, these systems were limited to analog RGB signals and basic composite sync outputs. They lacked proper color-encoded composite video (FBAS) and Y/C (S-Video) outputs, which are essential for connecting to many TVs and monitors.

This limitation meant that users could not take full advantage of the Amiga's advanced graphics capabilities when connecting to composite or S-Video inputs. The AMYVIDHYBRID+FBAS fills this gap by adding proper color composite and Y/C outputs, ensuring compatibility with a wider range of displays.

How Does AMYVIDHYBRID+FBAS Work?

The AMYVIDHYBRID+FBAS builds on the functionality of the original Commodore 390229-03 Video Hybrid while introducing new features:

• Color Composite Video (FBAS): Adds proper color-encoded composite video output, allowing connection to devices that support this standard.
• Y/C (S-Video) Output: Provides a high-quality Y/C signal for sharper video on compatible displays.
• RGB Channels: Retains the original hybrid's ability to convert 4-bit digital RGB signals into analog RGB output, amplified and terminated at 75 ohms.
• Synchronization Signal: Ensures proper sync for all video outputs, maintaining compatibility with original Amiga hardware.

Why Does This Matter?

For retro computing enthusiasts, the lack of color composite and Y/C outputs has been a long-standing limitation of classic Amigas. The AMYVIDHYBRID+FBAS addresses this issue by:

• Enhancing Compatibility: Enables Amigas to connect to a wider range of modern and vintage displays.
• Preserving Legacy: Ensures that these iconic machines can continue to be enjoyed with their full graphical potential.
• Modernizing Design: Uses standardized, readily available components to avoid the scarcity issues associated with the original hybrid.

Technical Specifications

The AMYVIDHYBRID+FBAS is designed for seamless integration into classic Amiga systems:

• Compact Design: Smaller and easier to install than the original hybrid (requires desoldering).
• Based on Revision 3.2: Ensures optimal performance and compatibility with all relevant Amiga models.
• Versatile Use: Can also be used for other 4-bit DAC RGB video projects (max +5V supply voltage).
• Dimensions:
• Thickness: 4 mm
• Width: 57 mm
• Height: 15 mm (PCB), 25 mm (including 22-pin header)

> Warning: Pin 1 is identified by a square pad and the number "1" on the PCB. Reverse insertion could cause damage!