1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
#pragma once
typedef
unsigned char
byte;
typedef
unsigned short
address;
extern byte acc;
extern byte X;
extern byte Y;
extern byte P;
extern byte S;
extern address PC;
extern byte* Memory;
extern byte ROM[];
enum Addressing
{
eImmediate,
eAccumulator,
eZeroPage,
eZeroPageIndexedX,
eZeroPageIndexedY,
eAbsolute,
eAbsoluteIndexedX,
eAbsoluteIndexedY,
eIndexedIndirect,
eIndirectIndexed,
eImplied,
eIndirectAbsolute,
eRelative
};
typedef
int
Addressing;
typedef
struct AddData
{
int cycles;
int length;
address add;
byte value;
}
AddData;
// GetMemory and SetMemory are declared here, but defined in apple.c
// This is because memory access of particular memory locations is influenced by the Apple I's specific setup, not by the CPU alone.
byte GetMemory(address x);
void SetMemory(address x, byte y);
extern void *current_instruction;
extern AddData idata;
extern void (*func)(Addressing, address);
|
