Download patch
ref: 8edbbe8acfc2ac01a9e2d202692cf37eeee5c325 parent: b73194ec7b1b0ec30e9658df818d183f4081cce7 author: Jonathan Dowland <jon+github@alcopop.org> date: Mon Feb 20 13:16:13 EST 2017
VGA porch emulation: make optional Based on feedback.