17 Commits

Author	SHA1	Message	Date
James Tauber	6fb2d79cda	reimplemented ADC and SBC based on 2006/2007 code	2011-08-06 22:35:45 -04:00
James Tauber	32120dffef	apparently PLA does not affect NZ flags	2011-08-06 22:12:11 -04:00
James Tauber	3a20c009d9	little BIT of simplication	2011-08-06 22:05:15 -04:00
James Tauber	c6a6071b2c	cleaned up ASL implementation	2011-08-06 21:50:01 -04:00
James Tauber	687b2e345f	TSX updated NZ flags	2011-08-06 21:41:52 -04:00
James Tauber	294d9b027a	fixed stray comment	2011-08-06 21:31:25 -04:00
James Tauber	ebca76c29b	factored out stack pull/push	2011-08-06 21:30:58 -04:00
James Tauber	d6875b2419	refactored flags to status byte and back	2011-08-06 21:12:02 -04:00
James Tauber	20457db088	slight refactor of update_nz and update_nzc	2011-08-06 21:05:22 -04:00
James Tauber	accc0a60bd	implemented BRK and RTI	2011-08-06 21:00:50 -04:00
James Tauber	807f392386	make further use of addressing mode refactor	2011-08-06 18:13:56 -04:00
James Tauber	28fcca6bde	added zero_page_y_mode	2011-08-06 18:09:37 -04:00
James Tauber	3344005fe7	added wrap-around for zero_page_x_mode	2011-08-06 18:08:39 -04:00
James Tauber	fef234f7c0	refactored addressing mode code	2011-08-06 18:07:50 -04:00
James Tauber	a48716a900	added if __name__ == "__main__" test for mainline	2011-08-06 17:46:38 -04:00
James Tauber	55d700fc68	simplified screen address to col/row translation based on code from 2006	2011-08-06 17:43:59 -04:00
James Tauber	80f221b0f5	initial update from 2001 code	2011-08-06 16:55:33 -04:00