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569f5abc28
byuu says:
Changelog:
- SMS: emulated the generic Sega memory mapper (none of the more
limited forms of it yet)
- (missing ROM shift, ROM write enable emulation -- no commercial
games use either, though)
- SMS: bus I/O returns 0xff instead of 0x00 so games don't think every
key is being pressed at once
- (this is a hack until I implement proper controller pad reading)
- SMS: very limited protection against reading/writing past the end of
ROM/RAM (todo: should mirror)
- SMS: VDP background HSCROLL subtracts, rather than adds, to the
offset (unlike VSCROLL)
- SMS: VDP VSCROLL is 9-bit, modulates voffset+vscroll to 224 in
192-line mode (32x28 tilemap)
- SMS: VDP tiledata for backgrounds and sprites use `7-(x&7)` rather
than `(x&7)`
- SMS: fix output color to be 6-bit rather than 5-bit
- SMS: left clip uses register `#7`, not palette color `#7`
- (todo: do we want `color[reg7]` or `color[16 + reg7]`?)
- SMS: refined handling of 0xcb, 0xed prefixes in the Z80 core and its
disassembler
- SMS: emulated (0xfd, 0xdd) 0xcb opcodes 0x00-0x0f (still missing
0x10-0xff)
- SMS: fixed 0xcb 0b-----110 opcodes to use direct HL and never allow
(IX,IY)+d
- SMS: fixed major logic bug in (IX,IY)+d displacement
- (was using `read(x)` instead of `operand()` for the displacement
byte fetch before)
- icarus: fake there always being 32KiB of RAM in all SMS cartridges
for the time being
- (not sure how to detect this stuff yet; although I've read it's
not even really possible `>_>`)
TODO: remove processor/z80/dissassembler.cpp code block at line 396 (as it's unnecessary.)
Lots of commercial games are starting to show trashed graphical output now.
22 lines
714 B
C++
22 lines
714 B
C++
struct MasterSystemCartridge {
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MasterSystemCartridge(string location, uint8_t* data, uint size);
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string manifest;
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//private:
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struct Information {
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} information;
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};
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MasterSystemCartridge::MasterSystemCartridge(string location, uint8_t* data, uint size) {
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manifest.append("board\n");
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manifest.append(" rom name=program.rom size=0x", hex(size), "\n");
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manifest.append(" ram name=save.ram size=0x8000\n");
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manifest.append("\n");
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manifest.append("information\n");
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manifest.append(" title: ", Location::prefix(location), "\n");
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manifest.append(" sha256: ", Hash::SHA256(data, size).digest(), "\n");
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manifest.append("\n");
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manifest.append("note: heuristically generated by icarus\n");
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}
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