Check the listing for details. COMMODORE 64C DUAL ROM ADAPTER KIT FOR COMMODORE 64C SWITCHLESS 28 PIN. Listed at 9.99 USD. COMMODORE 64C DUAL ROM ADAPTER KIT FOR COMMODORE 64C SWITCHLESS 28 PIN.***ONE (1) LOOSE KIT ONLY, NO EPROM, NO ROM, NOT SOLDERED! YOU SOLDER IT YOURSELF. COMES WITH 74HC74. SUPPORTS 27C64, 27C128, 27C256, 27C512 EPROMS.******THIS KIT ALLOWS YOU TO USE THE LISTED EPROM SIZES FOR TWO ROM IMAGES FOR YOUR 64C WITH 28 PIN KERNAL/BASIC (U4). SWITCH BETWEEN THEM USING THE RESTORE KEY DURING POWER CYCLE. NO TOGGLE SWITCH REQUIRED.******IF YOU INSTALL A SOCKET ON YOUR BOARD, YOU MUST REMOVE THE UPPER SHIELDING FOR KEYBOARD TO FIT CORRECTLY (THE STACK WILL BE TO HIGH AND HIT SHIELDING). SEE PHOTO WITH SHIELDING REMOVED.*** ***DESIGNED BY KUBAT, LINK/ADDRESS BELOW FOR HOW TO'S.***https://www.pcbway.com/project/shareproject/W219199ASC11_JiffyDOS_gerbers.html Will ship to 48 States only. Thank You for looking! Good Luck! ***FOR OTHER ITEMS CLICK THIS LINK***