1.1 --- a/ULA.txt Tue Dec 20 00:56:33 2011 +0100
1.2 +++ b/ULA.txt Mon Jan 09 00:34:03 2012 +0100
1.3 @@ -11,6 +11,12 @@
1.4 See: Acorn Electron Advanced User Guide
1.5 See: http://mdfs.net/Docs/Comp/Electron/Techinfo.htm
1.6
1.7 +Access to RAM involves accessing four 64Kb dynamic RAM devices (IC4 to IC7,
1.8 +each providing two bits of each byte) using two cycles within the 500ns period
1.9 +of the 2MHz clock to complete each access operation.
1.10 +
1.11 +See: Acorn Electron Service Manual
1.12 +
1.13 Hardware Scrolling
1.14 ------------------
1.15