ULA (shortlog)

ULA

Shortlog

2012-01-29	Paul Boddie	files	Fixed character attribute calculations, noting that attribute data is only
2012-01-27	Paul Boddie	files	Updated notes on hardware sprites and character attribute modes.
2012-01-09	Paul Boddie	files	Added some timing information and some general notes on system improvements.
2011-12-20	Paul Boddie	files	Merged general architecture-related changes.
2011-12-20	Paul Boddie	files	Introduced a separate video abstraction, making the ULA responsible for
2011-12-18	Paul Boddie	files	Null merge of general changes introducing features already present on this branch.
2011-12-18	Paul Boddie	files	Replaced the use of nested lists with a flat, genuine, global screen array
2011-12-18	Paul Boddie	files	Replaced the use of nested lists with a flat, genuine, global screen array.
2011-12-18	Paul Boddie	files	Changed the update function to build a new screen array on every invocation,
2011-12-18	Paul Boddie	files	Merged general changes.
2011-12-18	Paul Boddie	files	Fixed the width of the temporary surface.
2011-12-14	Paul Boddie	files	Added notes on alternative screen mode configurations, screen height adjustment and character attributes.
2011-12-12	Paul Boddie	files	Merged general changes.
2011-12-12	Paul Boddie	files	Moved the vertical scaling into the main program, ensuring that the ULA only
2011-12-11	Paul Boddie	files	Merged general changes.
2011-12-11	Paul Boddie	files	Replaced array usage with much simpler list operations.
2011-12-11	Paul Boddie	files	Removed obsolete comment.
2011-12-10	Paul Boddie	files	Merged general changes.
2011-12-10	Paul Boddie	files	Moved the application of pixel intensity to the main program, implementing it as
2011-12-10	Paul Boddie	files	Removed xrange usage to diagnose Shedskin behaviour.
2011-12-10	Paul Boddie	files	Removed array module usage since Shedskin's generated code still wants to be
2011-12-10	Paul Boddie	files	Merged changes beneficial to Shedskin usage.
2011-12-10	Paul Boddie	files	Merged Shedskin-related and general changes.
2011-12-10	Paul Boddie	files	Made the ULA's buffer use element types consistently.
2011-12-10	Paul Boddie	files	Introduced a fill method on the ULA and a convenience function to obtain the ULA
2011-12-10	Paul Boddie	files	Added an intermediate display buffer so that elementary Python data types can be
2011-12-09	Paul Boddie	files	Added notes about colour planes, hardware sprites, and BBC sound support.
2011-12-08	Paul Boddie	files	Changed the raise syntax to work with Shedskin.
2011-12-08	Paul Boddie	files	Moved memory initialisation and the array and itertools imports to the ula module.
2011-12-08	Paul Boddie	files	Moved the main program into a separate file.
2011-12-07	Paul Boddie	files	Permit vertical scrolling by amounts smaller than a character row.
2011-12-06	Paul Boddie	files	Fixed the screen size calculation for modes employing line spacing.
2011-12-05	Paul Boddie	files	Added spacing between character rows and fixed the number of rows in the modes involved.
2011-12-04	Paul Boddie	files	Changed the program architecture to involve an external screen update loop
2011-12-04	Paul Boddie	files	Added a module which simulates the video functions of the Acorn Electron ULA.
2011-12-03	Paul Boddie	files	Some documentation of the Acorn Electron ULA and discussion of potential enhancements.