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Author SHA1 Message Date
Thomas Harte
5f6ddf8557 Avoid expressing the same thing at different clock rates. 2023-01-08 13:58:12 -05:00
Thomas Harte
72e0bfecc1 Edge towards clock-independent line composition. 2023-01-07 14:57:32 -05:00
Thomas Harte
cdf547ac82 Decline to provide synthetic text mode timing on the Mega Drive. 2023-01-07 14:37:06 -05:00
Thomas Harte
dd5b4b484a Avoid double responsibility for state. 2023-01-07 14:34:33 -05:00
Thomas Harte
56831e02fc Expand fixed timing constants. 2023-01-07 13:10:51 -05:00
Thomas Harte
5d2d3944ef Make VRAM access delay a timing property. 2023-01-07 12:48:43 -05:00
Thomas Harte
f9e21df701 Avoid further hard-coded 342s. 2023-01-07 09:13:34 -05:00
Thomas Harte
bb436204f6 Merge branch 'VDPs' of github.com:TomHarte/CLK into VDPs 2023-01-07 09:10:50 -05:00
Thomas Harte
de45536b5c Elucidate a magic constant, add an extra constexpr. 2023-01-07 09:10:41 -05:00
Thomas Harte
ebc1264c2c Create a common home for timing information. 2023-01-06 22:39:46 -05:00
Thomas Harte
4875148617 Fill in Mega Drive numbers. 2023-01-05 14:22:51 -05:00
Thomas Harte
7a82b76911 Ensure visibility of memset. 2023-01-05 13:21:03 -05:00
Thomas Harte
27d37f71ec Generalise and better factor bit reversal and TMS drawing. 2023-01-05 13:18:10 -05:00
Thomas Harte
c4a5a9763e Minor indentation improvement. 2023-01-02 15:04:50 -05:00
Thomas Harte
a9f97ac871 Fix nothing-to-do test. 2023-01-02 15:04:08 -05:00
Thomas Harte
475440dc70 Update ClockConverter for potential alternative clocks. 2023-01-02 14:59:36 -05:00
Thomas Harte
dc3f8f5e42 These are the three fetchers to implement. 
They'll look fairly different from the TMS and SMS fetchers, I think, owing to the greater irregularity that comes with the smarter RAM accesses. I might need to play around for a while.
 2023-01-01 22:44:06 -05:00
Thomas Harte
459ef39b08 constexpr the TMS palette. 2023-01-01 22:34:07 -05:00
Thomas Harte
27812fd0e2 Separate fetchers into their own header. 2023-01-01 22:26:50 -05:00
Thomas Harte
38eb4d36de Better explain cumulative nature of @c to_internal. 2023-01-01 22:18:39 -05:00
Thomas Harte
2bd20a0cf8 Add further exposition. 2023-01-01 22:17:21 -05:00
Thomas Harte
da61909ec5 Explain the purpose here. 2023-01-01 21:20:30 -05:00
Thomas Harte
5729ece7bb Incompletely transitions towards more flexible clock ratios. 2023-01-01 14:20:45 -05:00
Thomas Harte
151f60958e Relocate the 9918 implementation file. 2023-01-01 14:01:19 -05:00
Thomas Harte
180045ada6 Convert vram_access_delay into a free-standing function. 2023-01-01 13:51:52 -05:00
Thomas Harte
11542e7a7f Improve const correctness, simplify inheritance. 2023-01-01 13:49:11 -05:00
Thomas Harte
71598250ea Improve commentary. 2023-01-01 13:41:51 -05:00
Thomas Harte
e8aab1fd2a Restore proper VDP selection. 2022-12-31 21:54:14 -05:00
Thomas Harte
ffb0b2ce0b Eliminate runtime duplication of personality. 2022-12-31 21:50:57 -05:00
Thomas Harte
b7c315058f Also template Base. 2022-12-31 21:47:05 -05:00
Thomas Harte
7d6eac2895 Template the TMS on its personality. 
Template parameter currently unused, but preparatory to other improvements.
 2022-12-31 15:08:33 -05:00
Thomas Harte
d79aac3081 Shuffle the personality enum into the 'public' header. 2022-12-31 15:01:11 -05:00
Thomas Harte
8d5547dc9e Minor further style improvements. 
... as I refamiliarise myself.
 2022-12-29 22:09:14 -05:00
Thomas Harte
5d89293c92 Improve constness, primarily of reverse_table. 2022-12-29 11:29:19 -05:00
Thomas Harte
5ba97da6cd Avoid macro. 2022-12-29 11:28:47 -05:00
Thomas Harte
37f07f349e Merge branch 'master' into VDPs 2022-12-27 22:50:53 -05:00
Thomas Harte
711f7b2d75 C++17 makes this a single step. 2022-12-27 22:50:12 -05:00
Thomas Harte
dca8c51384 Prefer to avoid a macro. 2022-12-27 22:36:27 -05:00
Thomas Harte
462b7dcbfa Add Mega Drive VRAM size. 2022-12-27 22:28:43 -05:00
Thomas Harte
2ab4b351ca Extend enum. 2022-12-27 22:20:47 -05:00
Thomas Harte
4eedec50fb
Merge pull request #1111 from TomHarte/LessDynamic 
Add note to future self.
 2022-12-27 20:24:28 -05:00
Thomas Harte
ee22a98c17 Add note to future self. 2022-12-27 20:23:25 -05:00
Thomas Harte
99ced5476f Add quick clock-rate notes. 2022-12-26 22:56:45 -05:00
Thomas Harte
cdbd821913
Merge pull request #1109 from TomHarte/68020Addressing 
Support 68020+ long extensions.
 2022-12-19 11:16:35 -05:00
Thomas Harte
8808014a85 Add AddressingMode::ExtensionWord to the executor. 2022-12-19 11:07:58 -05:00
Thomas Harte
6832cbeb31 Attempt fully to tie together 68020+ addressing. 2022-12-19 10:38:51 -05:00
Thomas Harte
08b3c42a5c Edge further towards supporting full extension words. 2022-12-10 16:22:16 -05:00
Thomas Harte
95c526d957 Start arrangements for full extension words. 2022-11-30 16:21:35 -05:00
Thomas Harte
3f3c9f7491 Update version number. 2022-11-25 15:45:44 -05:00
Thomas Harte
6aa8400996
Merge pull request #1106 from TomHarte/JoystickModifiers 
Ensure no dangling modifiers upon shortcut keyboard switch.
 2022-11-24 16:05:10 -05:00