ROMX+ for Apple II and II Plus


This is the ROMX+ from and designed by Dean Claxton and Jeff Mazur.

ReActiveMicro is an authorized dealer and partner with the in an effort to help bring more great products to the Apple II Community. If we back another vendor’s product you know it’s of the highest quality and can be trusted.

ROMX+ is an in-system programmable device that replaces the system ROM’s (D0-F8) and optionally, the Video ROM in your Apple II or II Plus computer. It stores up to 15 ROM images, and presents them for selection via an on-screen menu system. In addition, the menu system itself (the ROMX firmware) is updateable in-system. The ROMX+ comes standard with an on-board clock (backup battery included).

What do we mean by In-System Programmable? This simply means that you can re-program ROMX with your own ROM images and updates without removing the device from your computer, and without need for an external IC Programmer. Uploading of new ROM images is done through either the ROMX boot menu, or by running the ROMX.DISK utility from the ROMX floppy disk image. The firmware image is also upgradeable using the same process. Since the ROMX+ emulates the INTCXROM softswitch of the IIe and later machines, it can have up to 32K of ROM available in each image. This also allows ROMX+ to use many of the same images available for the ROMXc, ROMXe, and ROMXc+.

The optional ROMX video ROM with ROM-Link cable has 16 text ROMs (fonts) that can be selected from the ROMX menu or also associated with a specific system ROM. The ROMX+ is preloaded with a number of ROM images including several Integer and Applesoft images, basic diagnostics, and applications such as COPY II Plus and Choplifter. You can also turn on the computer and immediately have DOS 3.3 or ProDOS loaded from ROM.

Hardware Requirements: ROMX+ will work in any Apple II or II Plus. It will also work with many Apple II clones. It requires at least 32K of RAM but works best with 64K. It can work without any of the standard D0-F8 System ROMs installed (although they can be left in if desired).

Software and manual can be found from The ROM Exchange:

Utility Disk:
ROM Images:
Additional Info:

Comes as pictured, with ROMX+ system ROM adapter. Video ROM adapter with connection cable sold separately. Can replace “93-Series” ROMs or “27-Series” EPROMs. See accessories below for a lower case text display option.

For Apple II/II+ with 93-Series ROMs, no extras are needed. Most clones will also work as is. See for more information or contact

For the optional Text ROM board (Rev 7 motherboards and higher), order the 2316B SPCL Video ROM. Allows display of lower case text!

For the optional Text ROM board (pre-Rev 7 motherboards), order the 2513 Special Video ROM set.

Spare battery for the built in clock.

NOTE: ROMX+ will also work with many Apple II clones. See for more information or contact
The ROMX+ DOES work AS-IS with the 27-series II Plus motherboard from ReActiveMicro.

Read more about the ROMX+ and the Apple II Plus, Rev 7 RFI Motherboard on our Wiki.

Manuals and Support are there also.

In stock (can be backordered)

Additional information

Weight.4 lbs
Dimensions6 × 1 × 4 in
Mobo ROM Version

ROMX – 93-Series ROM (Apple standard), ROMX – 27-Series ROM (RM version)


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