We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
Emulation Mode Flag
From SnesLab
The Emulation Mode flag controls whether the 65c816 is behaving like a 6502.
When clear, the MPU is in 65c816 native mode.
When set, the MPU is in 6502 emulation mode.
This flag cannot be modified directly and is normally hidden from the programmer. To modify it, use the XCE instruction to swap its value with the carry flag's value.
The flag is set when a RESET interrupt is fired. In other words, the CPU always starts in emulation mode at boot and after a reset.
Reference
- Figure 17.3, Eyes & Lichty page 377, https://archive.org/details/0893037893ProgrammingThe65816/page/n403