Ry
eba264db70
Add rfp register, remove debug message about intruction pointer == None
2022-09-18 16:30:52 -07:00
Ry
f7b2320138
No longer use setjmp/longjmp to ensure things are atomic
2022-09-18 16:21:35 -07:00
Ry
3aaebeaf3e
Always allow exceptions to occur, regardless of interrupt flag state
2022-09-17 14:51:18 -07:00
Ry
9059889d3d
Ensure register pointers read the requested size, not always 32 bit
2022-09-16 23:29:16 -07:00
Ry
4a18af8f81
Allow switching the stack pointer automatically on interrupts/exceptions
2022-09-16 17:29:58 -07:00
Ry
3ce3af511e
Hack memory writes to use longjmp if a page fault occurs
2022-09-16 00:27:23 -07:00
Ry
8be5c65c73
Fix many issues relating to paging, split page fault into 2 vectors
2022-09-15 17:17:29 -07:00
Ry
3df3a98f3c
Rework the paging system a little bit, add FLP instr., bump ver to 0.5.0
2022-09-13 17:34:37 -07:00
Ry
82edb1d8da
Implement paging, bump version to 0.3.0
...
This works in a similar way to x86's paging, by using page directories
which point to page tables, which point to physical addresses.
2022-08-15 17:40:04 -07:00
Ry
4b506f3e65
Add int instruction, bump version to 0.2.0
2022-08-09 02:04:46 -07:00
Ry
e8960c569f
fox32+fox32asm: Remove pow instruction
2022-05-30 00:48:19 -07:00
Ry
a8d92c69b2
fox32+fox32core: Rework the interrupt system a little bit
2022-05-16 23:52:07 -07:00
Ry
7f796dd989
fox32: Dump RAM if bad opcode
2022-04-17 13:29:17 -07:00
Ry
998646cb80
fox32+fox32asm: Add proper support for greater than and less than
...
This adds IFGT, IFGTEQ, IFLT, and IFLTEQ, which makes it easier to
check for these conditions.
2022-03-12 12:15:27 -08:00
Ry
342c3e6061
fox32+fox32rom: Remove the concept of "fast" and "shared" memory
...
Instead of having two banks of RAM, just have one bank. This requires
the use of some cursed code, but it's fine :P
Co-authored-by: Lua <lua@foxgirl.dev>
2022-03-11 17:13:18 -08:00
ry755
69a47b9336
fox32: Prevent div from modifying the carry flag
2022-02-26 16:41:35 -08:00
ry755
eebeff2073
fox32: Set the stack pointer to zero by default
2022-02-11 20:33:39 -08:00
ry755
7083e7a704
fox32+fox32asm: Make ImmediatePtr encoding consistent for src and dest
2022-02-02 04:43:23 -08:00
ry755
e8287097ad
fox32: Use the instruction size when reading from an immediate pointer
...
Previously, Operand::ImmediatePtr always read 32 bits from memory, then
truncated the value if the instruction size was smaller. Technically
this worked, but it would cause fox32 to print warnings if reading a
value at the very end of memory, because it would attempt to read past
the end of memory. Now, Operand::ImmediatePtr contains the instruction
size which is used by read_source().
This reverts commit 634a776a631c8e34f138dfbbfebf1c5cc74b6f05
2022-02-02 04:18:57 -08:00
ry755
deed31144f
fox32: Remove outdated TODO
2022-02-02 04:07:09 -08:00
ry755
34de523f4d
fox32: Set the stack pointer to the end of fast memory by default
2022-01-27 17:22:00 -08:00
ry755
99621394ec
fox32: Move Memory to a separate file
2022-01-27 16:42:57 -08:00
ry755
994f6d7152
fox32: Move Bus to a separate file
2022-01-27 16:23:35 -08:00
ry755
3c6fda4b5c
fox32: Rename CPU to Cpu
2022-01-27 16:20:17 -08:00
ry755
cf835927cb
fox32: Use read_register() and write_register() everywhere
2022-01-26 23:43:02 -08:00
ry755
9b21b663f4
Initial commit
...
I should've made a git repo for this much sooner, oops :p
2022-01-26 22:21:21 -08:00
