New Apple IIc/IIc Plus ROM4x or ROM5x Upgrade Kit (new EPROM)

Upgrade Your Apple IIc or IIc Plus to ROM 4X or ROM 5X!
Compatible with Apple IIc (ROM Versions 255, 0, or 3) and Apple IIc Plus!

Take your Apple IIc or IIc Plus to the next level with a brand-new, never-used ROM chip—manufactured specifically for these upgrades and not salvaged from another machine.

Choose the Right ROM for Your Machine:

• ROM 4X : Designed for the Apple IIc, delivering new tools and features.
• ROM 5X : Exclusive to the Apple IIc Plus, offering advanced functionality and improvements.

Key Features of ROM 4X (Apple IIc):

• Automatic RAM Disk Recovery : Detects and reinstates a bootable RAM disk from battery-backed expansion memory (must include a bootable block).
• Built-in Tools Menu : Access various utilities by pressing Ctrl+Closed-Apple+Reset (or holding Closed-Apple when powering up). Options include:
  • Entering the Monitor unconditionally.
  • Rebooting the machine (initiates the standard boot sequence).
  • Zeroing corrupted RAM cards.
  • Running machine and RAM card diagnostics.
  • Selecting boot sources: SmartPort, internal floppy, or external floppy.
• Enhanced Boot Behavior : If no bootable device is found, the system automatically drops to BASIC (similar to the IIc Plus).
• Customizable Boot Device : Configure the default boot device by saving a file on the RAM disk.
• XModem-CRC Support : Added compatibility for easier file transfers.

Key Features of ROM 5X (Apple IIc Plus):

• Expanded SmartPort Features : Better compatibility and support for multiple devices.
• Advanced Boot Configuration : Save custom boot preferences, including RAM disk and SmartPort options.
• Improved Memory Management : Enhanced diagnostics and tools to manage both onboard and expansion memory.
• Built-in Tools Menu : Access utilities for rebooting, diagnostics, and more, with an improved UI for the IIc Plus.
• Faster and More Reliable Disk I/O : Optimized firmware for quicker and more dependable performance.
• Expanded Compatibility : Improved support for modern storage devices and peripherals.

Copyright Notice : Mgcaret and collaborators.

Upgrade now to unlock the full potential of your Apple IIc or IIc Plus! Choose ROM 4X or ROM 5X depending on your machine and enjoy a modernized retro computing experience!