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153 Commits 2 Branches 0 Tags 300 KiB
64fbd28610
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121 Commits

Author SHA1 Message Date
Preston Skupinski
64fbd28610 remove trailing whitespace 2011-12-27 19:04:10 -05:00
Preston Skupinski
225755bfb2 added functions for reading and storing words and then refactored the 
codebase to use that instead where useful
 2011-12-27 18:55:44 -05:00
Preston Skupinski
cd3c112b00 change 'reg' to 'r' in cpu_lib to shorten up calls and have it look more 
like using the normal cpu object
 2011-12-27 16:00:54 -05:00
Preston Skupinski
5ca04694de started refactoring the codebase by turning zero checks to either set or clear the p status register z flag into a function in a helper library 2011-12-27 01:16:05 -05:00
Preston Skupinski
4106d81cdf use charAt for accessing characters in a string for IE compatibility, fixes #1 2011-12-23 18:04:06 -05:00
Preston Skupinski
95e5a75e92 move MMU and CPU_65816 to the bottom of the function 2011-12-22 00:53:51 -05:00
Preston Skupinski
1199bff3e1 further minor style changes 2011-12-22 00:10:36 -05:00
Preston Skupinski
188fc0e713 numerous style fixes and code cleanup 2011-12-21 23:36:00 -05:00
Preston Skupinski
ad4f9e3c76 use a self executing function to hide as much from global scope as possible 2011-12-15 00:00:20 -05:00
Preston Skupinski
3bbe3c9999 many numerous minor style fixes 2011-11-23 02:05:19 -05:00
Preston Skupinski
4e19f48383 move size checking to read_byte and store_byte functions and clean up 
all calls to those functions that do that checking
 2011-11-22 13:42:55 -05:00
Preston Skupinski
155a153a29 don't use "location" as a name for a variable, general cleanup and 
added checks where necessary
 2011-11-22 11:53:42 -05:00
Preston Skupinski
f7e6cdff02 have load_binary use store_byte_long rather than store_byte 2011-11-06 19:34:32 -05:00
Preston Skupinski
135be106d9 Added executing only a set number of cycles per second and fixed the 
problems firefox had with it
 2011-11-06 00:20:31 -04:00
Preston Skupinski
a9b70c8ad0 Rework the way the cpu object loads and executes code 2011-11-05 21:45:36 -04:00
Preston Skupinski
798dd18835 use the correct p status register bit in DEC accumulator 2011-10-30 22:12:50 -04:00
Preston Skupinski
a1a337f3f6 finish adding cycle counting to the remaining instructions 2011-10-30 00:18:36 -04:00
Preston Skupinski
06d512a668 added cycle counting to even more instructions 2011-10-29 22:30:28 -04:00
Preston Skupinski
5a44410146 numerous more instructions now feature cycle counting 2011-10-29 20:53:32 -04:00
Preston Skupinski
fdaf4dd024 added cycle counting to numerous instructions 2011-10-28 21:15:55 -04:00
Preston Skupinski
f98a4770d7 added cycle counting to numerous instructions 2011-10-19 17:09:57 -04:00
Preston Skupinski
16f32df754 don't remove memory mapped io devices on cpu reset 2011-10-12 15:19:55 -04:00
Preston Skupinski
10cd88d08e Make sure branching can't cause the program counter to go below zero 
or above 0xffff
 2011-10-12 14:39:25 -04:00
Preston Skupinski
03a5217759 make sure lines don't go past column 80 in cpu.js 2011-09-15 13:55:13 -04:00
Preston Skupinski
d902611e9c added decimal mode support for SBC, wrote unit tests to verify that support and updated the TODO 2011-09-04 11:34:09 -04:00
Preston Skupinski
b505f7a50d handle the carry bit properly when in decimal mode for adc 2011-09-03 22:07:44 -04:00
Preston Skupinski
7cee0a3cd1 added decimal mode support for adc with 16-bit memory/accumulator mode and wrote unit tests to verify it 2011-09-03 21:56:39 -04:00
Preston Skupinski
990bbdc06c add decimal mode support for adc in emulation or 8-bit memory/accumulator mode and wrote up unit tests to verify it 2011-09-03 21:20:52 -04:00
Preston Skupinski
fadcea4c5d added more unit tests for LDA and fixed a bug in the implemention of the direct page indirect mode for LDA 2011-08-31 15:41:27 -04:00
Preston Skupinski
90cf744589 turn MMU into a function object so multiple cpu objects can be used at once and fixes a long standing bug where various unit tests would randomly fail 2011-08-30 10:44:45 -04:00
Preston Skupinski
19c9215181 add basic stepping support 2011-07-18 20:44:55 -04:00
Preston Skupinski
4a9456f83f added a reset function 2011-07-11 19:04:51 -04:00
Preston Skupinski
dbe014ada1 added STP 2011-06-19 13:13:29 -04:00
Preston Skupinski
5813feaa89 added WAI 2011-06-12 21:23:02 -04:00
Preston Skupinski
8377d8c009 added JSR absolute indexed x indirect 2011-06-12 19:37:07 -04:00
Preston Skupinski
a9e15285cb added JMP absolute indexed x indirect 2011-06-12 18:54:16 -04:00
Preston Skupinski
26fddd8943 added WDM 2011-06-09 20:24:05 -04:00
Preston Skupinski
eff69c28bc added JMP absolute long and JMP absolute indirect long 2011-06-09 20:01:36 -04:00
Preston Skupinski
fe0117a1e0 the cpu object is now passed as the first argument to memory mapped io device interaction functions 2011-06-04 11:36:20 -04:00
Preston Skupinski
a0b9497eb4 added TXS and TSX 2011-06-01 13:17:03 -04:00
Preston Skupinski
4f98a754b7 added TRB and both addressing modes for it 2011-06-01 13:01:16 -04:00
Preston Skupinski
48c6fe5cf9 added TSB and both addressing modes for it 2011-05-30 19:55:59 -04:00
Preston Skupinski
c9d491411b added the rest of the addressing modes for BIT and fixed a bug in a few operations 2011-05-30 19:22:19 -04:00
Preston Skupinski
71552b5720 added BIT immediate 2011-05-30 18:57:20 -04:00
Preston Skupinski
150d6e57d2 added basic memory mapped i/o support 2011-05-30 17:23:00 -04:00
Preston Skupinski
688c2aaaa3 added DEC and INC direct page indexed x and absolute indexed x 2011-05-23 21:37:28 -04:00
Preston Skupinski
4998c9c4dc added operations that still need to be implemented to the TODO and fixed a few errors in the opcode map 2011-05-22 20:07:29 -04:00
Preston Skupinski
bd89ee30e1 added direct page indexed x indirect addressing for operations that support it 2011-05-22 18:35:05 -04:00
Preston Skupinski
382a4b1fc6 added absolute long indexed x addressing for operations that support it 2011-05-22 15:16:44 -04:00
Preston Skupinski
1b1193abbf added absolute long addressing for many operations that support it 2011-05-22 14:13:16 -04:00