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Update README.md, referencing information from #8.

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# ROM 5X by MG
ROM 5X is a collection of enhancements to the Apple //c version 4. See the top level [README.md](../README.md) for more general information on ROM 4X and ROM 5X.
ROM 5X is a collection of enhancements to the Apple //c Plus (ROM version 5). See the top level [README.md](../README.md) for more general information on ROM 4X and ROM 5X.
It adds the following features to the Apple //c:
It adds the following features to the Apple //c Plus:
- Enter the monitor unconditionally.
- Reboot the machine (enter standard boot sequence).
- Zero the RAM card, in case it is corrupted.
- Execute the machine and RAM card diagnostics.
- Tell the machine to boot the SmartPort, the internal floppy drive, or an external floppy drive.
- Menu control the built-in accelerator.
- Tell the machine to boot the SmartPort/3.5 drive or the internal floppy drive.
- Menu control the built-in accelerator (via main menu or ctrl+tab+reset).
- Accelerator settings persist across resets.
- Build option to default the system to 1 MHz.
- Changes ctrl+esc+reset to toggle the accelerator rather than turn it off only.
RAM expansion cards known to work with ROM 4X include the AE RAM Express Cards (but no battery!), and the A2Heaven [RAM Express II](http://a2heaven.com/webshop/index.php?rt=product/product&product_id=146) for the original //c, and the [RAM Express II+](http://a2heaven.com/webshop/index.php?rt=product/product&product_id=144) for the memory-expandable //c and IIc Plus.
RAM expansion cards known to work with ROM 5X include the AE RAM Express Cards (but no battery!), and the A2Heaven [RAM Express II+](http://a2heaven.com/webshop/index.php?rt=product/product&product_id=144) for the memory-expandable //c and IIc Plus.
# User Guide
@ -45,9 +45,10 @@ Once you have a ROM chip, generally the instructions [here](http://mirrors.apple
### Emulator
Copy the ROM into the appropriate location for your emulator. At the time of writing the only emulator I am aware of that can emulate the //c with memory expansion is [Catakig](http://catakig.sourceforge.net/) for MacOS. It's a bit older of an emulator but it runs fine on newer MacOSes.
Copy the ROM into the appropriate location for your emulator. As of July 2018, the following emulators are known to successfully emulate the Apple IIc Plus:
MAME's Apple //c emulation may work, but I have not tried it.
* [Leon Bottou](https://github.com/leonbottou)'s "universal" versions of GSPlus and KEGS.
* MAME after [this commit](https://github.com/mamedev/mame/commit/31aaae7491ea4233de75456af178054e650f4344).
## Operation