Koray Yanik
9cc63a248e
Fix some verilog issues
2023-10-03 22:30:36 +01:00
Koray Yanik
06746f71fb
WIP PPU LX/LY registers
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Removed second reg16 read port - no longer needed.
2023-10-03 20:44:28 +01:00
Koray Yanik
fda176d3b5
Complete rewrite from scratch, bootstrap WIP
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Rewrite to use several bus multiplexers, resulting into a less messy
microarchitecture (hopefully). Some more room for cleanup though...
Supports every instruction from the bootstrap rom, more or less.
LY hacked at 0x90 to progress through vsync instantly.
No cartridge is present yet, so we will always fail checksum test and lock up.
2023-10-01 23:00:56 +01:00
Koray Yanik
e713f8de87
Implement RLA and POP RR
2022-02-08 23:53:02 +00:00
Koray Yanik
4f892eb3f2
Implement RL r instruction
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Some groundwork on rotation operations
2022-02-08 16:14:57 +00:00
Koray Yanik
c8756dafa6
Implement push rr
2021-02-23 22:38:10 +00:00
Koray Yanik
f6e68231fd
Implement call nn
2021-02-22 23:07:10 +00:00
Koray Yanik
7e558104de
Implement ld a, rr
2021-02-22 22:20:47 +00:00
Koray Yanik
bd8df33066
Rename decoding signals to be more consistent
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r/n now always refers to 8bit registers, rr/nn to 16bit.
2021-02-22 21:58:54 +00:00
Koray Yanik
dc32757dfc
Implement ld r, r
2021-02-22 21:43:22 +00:00
Koray Yanik
ded64a8954
Implement inc r
2021-02-20 22:57:15 +00:00
Koray Yanik
49ce1631b3
Implement LD ($FF00+C), A
2021-02-20 22:10:47 +00:00
Koray Yanik
b1b2055db9
Fix another bug in 8bit register writing
2021-02-20 20:52:02 +00:00
Koray Yanik
67578ab87f
Fix bug in registers when loading 8bit values
2021-02-20 15:56:38 +00:00
Koray Yanik
67361093ec
Implement LD r, $nn
2021-02-20 15:56:22 +00:00
Koray Yanik
7327ecffb9
Implement JR CC, $nn
2021-02-20 15:55:31 +00:00
Koray Yanik
93912e2089
Implemented BIT $n, r
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First of the CB prefixed opcodes.
2021-02-19 21:53:13 +00:00
Koray Yanik
8c65e4a669
Fix some typo's
2021-02-19 21:49:38 +00:00
Koray Yanik
8f0b8d3a48
Implemented LDD (HL), A
2021-02-18 23:22:26 +00:00
Koray Yanik
3e92cf5eec
Fix LD RR,$nnnn instruction not reading operand
2021-02-18 09:27:17 +00:00
Koray Yanik
2937ff492b
Initial register bank, support LD RR, $nnnn instructions
2021-02-17 22:40:24 +00:00
Koray Yanik
237a5f1489
Implemented SP, $nnnn and XOR A instructions
2021-02-16 23:05:46 +00:00
Koray Yanik
aa92344d10
Initial work on decoder
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Decode the LD SP, $nnnn instruction as our first three-byte
instruction.
2021-02-16 21:13:50 +00:00
Koray Yanik
3191a19f7e
Initial work on reading instructions from bootROM
2021-02-15 22:55:09 +00:00
Koray Yanik