6502/erc-c
1
0
Fork 0
mirror of https://github.com/pevans/erc-c.git synced 2024-11-01 04:04:28 +00:00
Code Issues Projects Releases Wiki Activity

Remove next_byte, read_byte; remove opcode from execute

Browse Source 
The execute function should just work from the PC register. It might
seem to be easier to test by passing an arbitrary opcode into the
function, but because so much of the chip's execution is
context-sensitive (that is, it expects PC to be pointing at the opcode,
to have its operand in front of it, etc.), passing an arbitrary opcode
is not really reflective of what needs to be in place for the function
to work correctly.
This commit is contained in:
Peter Evans 2018-01-09 20:56:11 -06:00
parent 04aab568df
commit a785eb5665
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/mos6502.h
View File

@ -119,9 +119,7 @@ extern int mos6502_instruction(vm_8bit);
extern mos6502 *mos6502_create();
extern mos6502_instruction_handler mos6502_get_instruction_handler(vm_8bit);
extern vm_16bit mos6502_pop_stack(mos6502 *);
extern vm_8bit mos6502_next_byte(mos6502 *);
extern vm_8bit mos6502_read_byte(mos6502 *);
extern void mos6502_execute(mos6502 *, vm_8bit);
extern void mos6502_execute(mos6502 *);
extern void mos6502_flash_memory(mos6502 *, vm_segment *);
extern void mos6502_free(mos6502 *);
extern void mos6502_modify_status(mos6502 *, vm_8bit, vm_8bit);