Tag: activity leds

Vintage 16K Apple II memory board with power, read, and write activity LEDs.

The MacEffects listing said Sold out on 2026-07-24. The board does not include its required 4116 memory chips. The original manufacturer and exact board model were not identified, so compare photographs and connector details before buying a used example.

Adds bank-activity LEDs and up to 8 MB of recognized memory through the Macintosh Portable memory slot.

The MacEffects page said Sold out on 2026-07-24. The non-backlit M5120 is supported at 8 MB; a reported 9 MB jumper setup is unstable and unsupported. The backlit M5126 is sold as a 5 MB card unless the installer adds the included /AS jumper wire at their own risk.

Adds 128 KB of bank-switched RAM to an Apple II or II Plus through the slot 0 language-card connector.

The product was available on backorder with an Add to cart path on 2026-07-24. Software must support the selected Saturn-style bank-switching scheme to use the full capacity.

Expands one Atari SIO connection into four peripheral ports with optional external power and bus-activity indicators.

Retro Lemon marked the assembled hub in stock and Lotharek exposed a login-or-register-to-buy path on 2026-07-27. Both pages describe the same one-input, four-output design with command, read, and write activity LEDs and a 4 mm acrylic top cover. An Atari SIO cable is required but not included. External power is normally unnecessary; when needed, use a 5 V center-positive supply for the 2.1/5 mm DC jack, which is also not included.