Tag: port expander

Passive one-to-three Commodore 64 user-port expander with an onboard reset button.

The Arcadia by Eye-Box listing was out of stock on 2026-07-27. A reviewed Shareware Plus unit exposed three connectors. The right-hand position can obstruct the cassette port, and the passive board has no per-slot disable controls. Connect or remove peripherals only with power off.

Three-slot C64 and C128 cartridge-port expander with per-slot switching, a fuse, status LEDs, and reset.

AMI64 presented a current-priced listing on 2026-07-27. The seller explicitly excludes the Commodore 64 Ultimate and Ultimate 64. Cartridge combinations can still conflict electrically or in the memory map, so change connections only with power off and enable only known-compatible combinations.

Compact two-connector cartridge-port expander with an upright slot and reset button for C64-family computers.

Protovision showed 12 Mini X-Pander+ units in stock with a one-to-two-week shipping estimate on 2026-07-27. The seller explicitly says it is not compatible with the 1541 Ultimate 2. Two enabled cartridges must use compatible bus signals and different address ranges.

Open four-port Commodore IEC hub with a switch that can hide each attached branch from bus attention.

Retro 8bit Shop showed one new unit in stock on 2026-07-27, while the Eagle design remains open for DIY builds. This original design switches only ATN, not every IEC signal; disabled devices remain electrically connected to CLK, DATA, and RESET and can still load or disturb the bus. The acrylic case is an accessory folded into this hardware family.

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.

Open cartridge-port expander with three independently controlled positions, configurable bus signals, and a reset switch.

The official store exposed an active $30 listing on 2026-07-27, and the open Eagle files remain available. Cartridge combinations are not guaranteed, the two connectors at the third position share one set of switches, and the passive bus can worsen marginal signal integrity. Insert, remove, and configure hardware only with the computer powered off.