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934a1f7025
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236 Commits

Author SHA1 Message Date
Adrian Conlon
934a1f7025 Use the virtual methods, busRead and busWrite for all processor bus actions. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-03-02 21:58:34 +00:00
Adrian Conlon
f0376fa81e Use macros to define our device pins. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-14 23:17:54 +00:00
Adrian Conlon
a44658ec94 Correct a coulple of newly introduced GB issues. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-14 02:23:48 +00:00
Adrian Conlon
92d23d82d6 Start big refactor of device/CPU pin usage (to allow pin events throughout). 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-14 02:10:17 +00:00
Adrian Conlon
68030610d8 Move to an event driven clock tick event for all CPUs 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-09 23:24:33 +00:00
Adrian Conlon
a13ad5042a Correct constructions of register16_t: the structure is "#ifdef"ed for different endian arrangements. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2019-01-06 11:27:43 +00:00
Adrian Conlon
f38d326ca7 Improve the flexibility of the BUS mapping/read/write architecture. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-12-29 19:17:36 +00:00
Adrian Conlon
dc477cd050 Use explicit enumeration types (improves type safety) where appropriate. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-12-01 15:24:29 +00:00
Adrian Conlon
a940a29283 Unify build settings across all the EightBit libraries. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-28 21:24:51 +00:00
Adrian Conlon
e156b1ff1a Correct some more compilation warnings (across the whole EightBit project). 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-25 19:02:11 +00:00
Adrian Conlon
68b352d1df Wire the GameBoy board like a piece of powered hardware. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-12 00:38:03 +00:00
Adrian Conlon
fdbb28828f Apply the concept of powered components to the "board" 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-11 16:48:44 +00:00
Adrian Conlon
e688411cb9 Refactor memory related code a little to make the hierarchy of classes a little easier to understand. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-04 16:38:57 +00:00
Adrian Conlon
95968cb000 Whoops: missed boost update for LR35902 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-04 13:26:12 +00:00
Adrian Conlon
8ef5d97366 Update boost from 1.65 -> 1.68 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-04 12:58:01 +00:00
Adrian Conlon
9132f2028f Add an "UnusedMemory" class to better allow "gaps" in the memory map. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-03 23:11:48 +00:00
Adrian Conlon
984626a331 Introduce the concept of a MemoryInterface to the EightBit library. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-03 22:15:17 +00:00
Adrian Conlon
68a785ceec Add an address masking to the memory mapping structure. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-11-01 23:43:29 +00:00
Adrian Conlon
015071fcfb Tidy up GameBoy processor (LR35902) with respect to C++14/17 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 19:23:02 +01:00
Adrian Conlon
8dbb3eafec Switch to C++17 standard in all EightBit projects. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-27 14:28:14 +01:00
Adrian Conlon
1b2ddd8843 Don't expose the bus via the CPU any more: if a component needs the bus, it should be prepared to hold a reference to it. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-10-20 20:52:41 +01:00
Adrian Conlon
8d3551e681 Refactor bit set/get routines from processor class to lower level chip class. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-29 14:08:44 +01:00
Adrian Conlon
fe3794e011 Simplify register16_t usage a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-16 12:00:29 +01:00
Adrian Conlon
7d840f1a42 Modifying the manner in which memory is mapped, allows a fairly clean mechanism for loading Intel "hex" files. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-09-15 14:35:59 +01:00
Adrian Conlon
97272d650d Simplify processor bus access a little by further allowing register16_t address access. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-29 13:52:25 +01:00
Adrian Conlon
a8cc289149 Whoops: The "Bus" class *really* isn't allowed to know the "endianness" of the attached processor! 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-27 11:27:33 +01:00
Adrian Conlon
1212e8d4f0 Tidy some processor virtual specifications. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 13:35:53 +01:00
Adrian Conlon
17c46264e9 Match the GameBoy code to the updated handling of reset (etc.) interrupts. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 01:57:22 +01:00
Adrian Conlon
6d4223c368 Start moving towards reset being just another style of interrupt. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-25 01:34:30 +01:00
Adrian Conlon
b0aacce406 Tidy header file usage a little. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-18 23:56:16 +01:00
Adrian Conlon
ed76038bfa More memptr adjustments 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-17 13:59:59 +01:00
Adrian Conlon
70c70af969 Sort out some exception and member initialisation rules. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-08-11 21:19:19 +01:00
Adrian Conlon
cac871cf2b Remove duplicated code (from const definitions) the performance benefit isn't worth the amount of duplicated code. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-24 20:58:20 +01:00
Adrian Conlon
feb5e7ad60 Simplifications carried over from the Z80 implementation. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-23 16:43:05 +01:00
Adrian Conlon
67487b5b6e Simplify the usage of the register16_t union. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-16 00:55:32 +01:00
Adrian Conlon
fbf098ae00 Simplify memory event handlers and ROM recognition a little (bit of speed difference) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-10 22:00:52 +01:00
Adrian Conlon
3e854c7c49 Const some more bus/processor usage, and ensure the data bus is a member, not a reference to memory. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-06-10 00:40:56 +01:00
Adrian Conlon
116f9961c4 Add a higher/lower nibble mask 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-05-25 22:36:10 +01:00
Adrian Conlon
ae177b9b92 Remove unnecessary member variable initialisation. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-05-04 04:12:25 +01:00
Adrian Conlon
740cf01085 Slightly better use of vector/array for pixel display. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-05-04 03:38:39 +01:00
Adrian Conlon
0b2c1fa084 Gameboy, some random tidy ups. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-05-02 02:47:47 +01:00
Adrian Conlon
4b4f6b1a49 Some *small* consistency changes. Perhaps some performance gains. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-04-11 23:53:26 +01:00
Adrian Conlon
45dc274167 Get rid of wrappers for bus access: i.e. make it clearer where the bus is being read/written. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-03-10 01:53:57 +00:00
Adrian Conlon
adf506a41e Optimisation: Prefer return by value to return by reference. ~10% speed-up! 
Just watch a video by Chandler Carruth from 2015, where he talked about C++ optimisers...

Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-02-25 19:48:01 +00:00
Adrian Conlon
d34b161255 Simplify some build options. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-02-19 23:18:21 +00:00
Adrian Conlon
29edc46966 Simplify some MEMPTR usage in Intel processors. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2018-01-10 23:08:14 +00:00
Adrian Conlon
697bfb636d A more succinct definition of the LR35902 interrupt mechanism. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-12 22:29:37 +00:00
Adrian Conlon
a1c753d63e Couple of small tidy ups on the LR35902 implementation. 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-10 21:57:32 +00:00
Adrian Conlon
1edabd79f3 More pinout oriented method of executing instructions (especially interrupts) 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-10 21:41:48 +00:00
Adrian Conlon
23f7a88480 Further 8080/Z80 interrupt rewrite 
Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
 2017-12-03 00:57:47 +00:00