16 Commits

Author	SHA1	Message	Date
Rob McMullen	2ae87bf12e	Fixed cycle timing for multi-byte NOP instructions	2017-12-19 09:20:27 -08:00
Rob McMullen	454e33269a	Fixed STA; it's the only operation that doesn't have extra cycles for crossing page boundaries	2017-12-19 09:20:27 -08:00
Rob McMullen	75bb592753	Added extra cycles when crossing page boundaries and for branches taken	2017-12-19 09:18:36 -08:00
Rob McMullen	b6542017bd	Updated instruction cycle timing for each opcode ... * Opcode timings are without page crossing or branch taken extra cycles	2017-12-18 21:19:51 -08:00
Rob McMullen	d4f85001dc	Added multi-byte NOP instructions ... * fixes line #5010: C6C7 08 PHP	2017-12-18 12:19:59 -08:00
Rob McMullen	15287322f1	Handle zero page wraparound in ($xx),Y ... * fixes line #3065: D95B C9 12 CMP	2017-12-18 12:01:18 -08:00
Rob McMullen	986a9f33b6	Handle zero page wraparound in ($xx,X) ... * fixes line #1100: CFF4 C9 5D CMP	2017-12-18 11:58:03 -08:00
Rob McMullen	44dfdfaca5	Handle JMP ($xxFF) bug	2017-12-18 11:27:17 -08:00
Rob McMullen	145de40872	Fixed PLP to always clear B flag ... * line #103: C826 D0 09 BNE	2017-12-18 10:37:23 -08:00
Rob McMullen	3471e9aa3a	Fixed PHP to only modify B flag in byte written, status reg itself is unchanged ... * line #71: C7E8 68 PLA * see http://visual6502.org/wiki/index.php?title=6502_BRK_and_B_bit	2017-12-18 10:11:25 -08:00
Rob McMullen	4bfc5655b6	Removed DECIMAL message to allow comparisons to NES log	2017-12-18 09:52:50 -08:00
Rob McMullen	c5e9cf084e	Added command line args to set initial machine state ... * changed debug print to match a validation run found on nesdev.com	2017-12-18 09:15:02 -08:00
DavidBuchanan314	622a2dda85	Add framework for cycle counting	2017-01-08 16:28:32 +00:00
DavidBuchanan314	04e228bfef	Fixed memory wrapping in address-mode decoders	2017-01-03 21:51:21 +00:00
DavidBuchanan314	1da995b11a	Made variable names slightly more consistent	2017-01-03 20:19:58 +00:00
DavidBuchanan314	378169d56b	Initial commit	2017-01-03 19:39:48 +00:00