Preston Skupinski
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cdf374dcd0
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Cleanup of branch instructions
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2012-01-05 00:50:49 -05:00 |
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Preston Skupinski
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577b47a497
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cleanup of DEC instructions and started writing tests for them
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2012-01-03 10:15:43 -05:00 |
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Preston Skupinski
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55f059b09c
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Cleaned up INC instructions
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2012-01-02 20:43:48 -05:00 |
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Preston Skupinski
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2158ce0fb2
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wrote a generic template for the increment instructions that work on
registers and used it for those instructions
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2012-01-02 15:16:56 -05:00 |
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Preston Skupinski
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0539c5c5ff
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move zero checking from end of each if block to end of function
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2012-01-01 23:53:31 -05:00 |
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Preston Skupinski
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e1f827b446
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use cpu_lib.addressing.Absolute_indexed_x for LDY_absolute_indexed_x
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2011-12-31 19:41:24 -05:00 |
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Preston Skupinski
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e6ce09016f
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move common addressing functionality for direct page indirect long indexed y to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 19:26:05 -05:00 |
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Preston Skupinski
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29a238b5bd
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move common addressing functionality for direct page indirect indexed y to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 19:12:39 -05:00 |
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Preston Skupinski
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10d0ee341b
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move common addressing functionality for direct page indirect long to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 18:52:52 -05:00 |
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Preston Skupinski
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664bf85268
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move common addressing functionality for direct page indexed x indirect to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 18:38:08 -05:00 |
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Preston Skupinski
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23bedf5ce7
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move common addressing functionality for absolute long indexed x to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 18:17:19 -05:00 |
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Preston Skupinski
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a29ee2fb7c
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move common addressing functionality for absolute long to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 18:01:06 -05:00 |
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Preston Skupinski
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9398885bc2
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move common addressing functionality for direct page indirect to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 17:32:39 -05:00 |
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Preston Skupinski
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0f73c71a7e
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move common addressing functionality for stack relative indirect indexed y to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 17:21:24 -05:00 |
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Preston Skupinski
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1fd918801a
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move common addressing functionality for absolute indexed y to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 16:56:57 -05:00 |
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Preston Skupinski
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19e50d4bf7
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move common addressing functionality for absolute indexed x to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 16:56:48 -05:00 |
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Preston Skupinski
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72508335ba
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move common addressing functionality for stack relative to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 15:52:45 -05:00 |
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Preston Skupinski
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539aaff3ce
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move common addressing functionality for direct page indexed x to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 15:26:41 -05:00 |
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Preston Skupinski
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65b7448052
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move common addressing functionality for direct page and absolute to cpu_lib and use that as the basis for instructions that utilize that addressing mode
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2011-12-31 15:26:29 -05:00 |
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Preston Skupinski
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26ea82204f
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added the ability for the cpu to load in an array of bytes
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2011-12-27 19:33:14 -05:00 |
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Preston Skupinski
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64fbd28610
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remove trailing whitespace
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2011-12-27 19:04:10 -05:00 |
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Preston Skupinski
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225755bfb2
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added functions for reading and storing words and then refactored the
codebase to use that instead where useful
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2011-12-27 18:55:44 -05:00 |
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Preston Skupinski
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cd3c112b00
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change 'reg' to 'r' in cpu_lib to shorten up calls and have it look more
like using the normal cpu object
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2011-12-27 16:00:54 -05:00 |
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Preston Skupinski
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5ca04694de
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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
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2011-12-27 01:16:05 -05:00 |
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Preston Skupinski
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4106d81cdf
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use charAt for accessing characters in a string for IE compatibility, fixes #1
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2011-12-23 18:04:06 -05:00 |
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Preston Skupinski
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95e5a75e92
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move MMU and CPU_65816 to the bottom of the function
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2011-12-22 00:53:51 -05:00 |
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Preston Skupinski
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1199bff3e1
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further minor style changes
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2011-12-22 00:10:36 -05:00 |
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Preston Skupinski
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188fc0e713
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numerous style fixes and code cleanup
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2011-12-21 23:36:00 -05:00 |
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Preston Skupinski
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ad4f9e3c76
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use a self executing function to hide as much from global scope as possible
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2011-12-15 00:00:20 -05:00 |
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Preston Skupinski
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3bbe3c9999
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many numerous minor style fixes
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2011-11-23 02:05:19 -05:00 |
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Preston Skupinski
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4e19f48383
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move size checking to read_byte and store_byte functions and clean up
all calls to those functions that do that checking
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2011-11-22 13:42:55 -05:00 |
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Preston Skupinski
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155a153a29
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don't use "location" as a name for a variable, general cleanup and
added checks where necessary
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2011-11-22 11:53:42 -05:00 |
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Preston Skupinski
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f7e6cdff02
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have load_binary use store_byte_long rather than store_byte
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2011-11-06 19:34:32 -05:00 |
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Preston Skupinski
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135be106d9
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Added executing only a set number of cycles per second and fixed the
problems firefox had with it
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2011-11-06 00:20:31 -04:00 |
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Preston Skupinski
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a9b70c8ad0
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Rework the way the cpu object loads and executes code
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2011-11-05 21:45:36 -04:00 |
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Preston Skupinski
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798dd18835
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use the correct p status register bit in DEC accumulator
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2011-10-30 22:12:50 -04:00 |
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Preston Skupinski
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a1a337f3f6
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finish adding cycle counting to the remaining instructions
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2011-10-30 00:18:36 -04:00 |
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Preston Skupinski
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06d512a668
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added cycle counting to even more instructions
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2011-10-29 22:30:28 -04:00 |
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Preston Skupinski
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5a44410146
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numerous more instructions now feature cycle counting
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2011-10-29 20:53:32 -04:00 |
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Preston Skupinski
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fdaf4dd024
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added cycle counting to numerous instructions
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2011-10-28 21:15:55 -04:00 |
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Preston Skupinski
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f98a4770d7
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added cycle counting to numerous instructions
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2011-10-19 17:09:57 -04:00 |
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Preston Skupinski
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16f32df754
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don't remove memory mapped io devices on cpu reset
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2011-10-12 15:19:55 -04:00 |
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Preston Skupinski
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10cd88d08e
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Make sure branching can't cause the program counter to go below zero
or above 0xffff
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2011-10-12 14:39:25 -04:00 |
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Preston Skupinski
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03a5217759
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make sure lines don't go past column 80 in cpu.js
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2011-09-15 13:55:13 -04:00 |
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Preston Skupinski
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d902611e9c
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added decimal mode support for SBC, wrote unit tests to verify that support and updated the TODO
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2011-09-04 11:34:09 -04:00 |
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Preston Skupinski
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b505f7a50d
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handle the carry bit properly when in decimal mode for adc
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2011-09-03 22:07:44 -04:00 |
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Preston Skupinski
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7cee0a3cd1
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added decimal mode support for adc with 16-bit memory/accumulator mode and wrote unit tests to verify it
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2011-09-03 21:56:39 -04:00 |
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Preston Skupinski
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990bbdc06c
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add decimal mode support for adc in emulation or 8-bit memory/accumulator mode and wrote up unit tests to verify it
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2011-09-03 21:20:52 -04:00 |
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Preston Skupinski
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fadcea4c5d
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added more unit tests for LDA and fixed a bug in the implemention of the direct page indirect mode for LDA
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2011-08-31 15:41:27 -04:00 |
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Preston Skupinski
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90cf744589
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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
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2011-08-30 10:44:45 -04:00 |
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