CocoFLASH is a multi-ROM cartridge system for the TANDY Color COmputer Models 1,2 and 3. 

The unit offers the following features:

• 8 Megabyte of FLASH ROM storage, enough for 1000 8kB ROM images, or 512 16K images
• 64kB of EEPROM storage (for game save storage, or other data)
• Orchestra 90 compatibility (including stereo out capability)
• 2 user defined switches
• 1 user defined LED
• cartridge bank support (ala RoboCop, up to 1MB cart size)

Firmware features:

• requires only 4 bytes of IO space
• IO base register can be modified by software to anywhere in $ff40-$ff7f)
• IO registers can be "hidden"
• Optional Robocop "offset" register
• dual offset capability (master 4kB bank register + optional 16kB offset register)
• programmatic "autostart" capability
• Manufacturer and Device ID registers