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+# z80 Emulation Library
+
+I wrote this z80 emulator library in 2008 after being dissatisfied with other
+emulators for one reason or another. It aims to be cycle-accurate by modeling
+the number of T-cycles per instruction. See the [Z80 CPU User
+Manual](https://www.zilog.com/docs/z80/um0080.pdf) for details about T-cycles.
+
+## Operation
+
+Libzel is very low level. It operates one instruction at a time, calling
+callbacks to read memory, perform I/O, and handle interrupts. No assumptions
+are made about memory layout or peripheral organization.
+
+None of the standard Zilog peripherals are implemented and they must be
+handled by the callbacks.
+
+## Paper
+
+Libzel was used to emulate the Sequoia AVC Advantage voting machine as
+described in Checkoway et al.'s [_Can DREs Provide Long-Lasting Security? The
+Case of Return-Oriented Programming and the AVC
+Advantage_](https://www.cs.uic.edu/~s/papers/evt2009/).