6502
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r65emu
mirror of https://github.com/jscrane/r65emu.git
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minor updates

This commit is contained in:
Stephen Crane 2015-11-30 14:49:56 +00:00
parent 9d092f4e8b
commit 6856eac8a6
7 changed files with 24 additions and 16 deletions
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3
cpu.h
View File

@ -5,6 +5,8 @@
#include <setjmp.h>
#endif
#undef PC
class CPU: public Checkpointable {
public:
virtual void run(unsigned instructions) =0;
@ -22,6 +24,7 @@ public:
protected:
CPU (Memory &mem, jmp_buf &e, statfn s): _mem(mem), _err(e), _status(s), _debug(false) {}
Memory &_mem;
Memory::address PC;
jmp_buf &_err;
statfn _status;
bool _debug;

2
hardware.h
View File

@ -27,7 +27,7 @@
//#define SPIRAM_CS PF_3
#define SPIRAM_SPI 1
#define SPIRAM_DEV SPI_for_SD
#define SPIRAM_SIZE 32768
#define SPIRAM_SIZE 65536
// "tape" storage...
#define SD_CS PF_3

3
i8080.cpp
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@ -2,6 +2,7 @@
#include "memory.h"
#include "cpu.h"
#include "ports.h"
#include "i8080.h"
#define CPU_STATE_FMT "%04x %02x %02x %04x %04x %04x %04x %d%d%d%d%d%d%d%d\r",\
@ -117,7 +118,7 @@ int i8080::parity_table[] = {
1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
};
i8080::i8080(Memory &m, jmp_buf &jb, CPU::statfn s, Ports &d): CPU(m, jb, s)
i8080::i8080(Memory &m, jmp_buf &jb, CPU::statfn s, PortDevice<i8080> &d): CPU(m, jb, s)
{
_ports = &d;

16
i8080.h
View File

@ -6,14 +6,7 @@
class i8080: public CPU {
public:
class Ports {
public:
virtual void out(byte p, byte v, i8080 *cpu) =0;
virtual byte in(byte p, i8080 *cpu) =0;
};
i8080(Memory &, jmp_buf &, CPU::statfn, Ports &);
i8080(Memory &, jmp_buf &, CPU::statfn, PortDevice<i8080> &);
void run(unsigned);
void reset();
@ -51,7 +44,7 @@ private:
struct { byte L, H; };
word HL;
};
Memory::address PC, SP;
Memory::address SP;
union {
struct {
unsigned C:1;
@ -66,7 +59,7 @@ private:
byte SR;
};
int _irq_pending;
Ports *_ports;
PortDevice<i8080> *_ports;
typedef void (i8080::*OP)();
OP _ops[256];
@ -322,7 +315,8 @@ private:
inline void _and(byte b) {
A = A & b;
_szp(A);
flags.C = flags.H = 0;
flags.C = 0;
flags.H = 1;
}
void anab() { _and(B); }

11
ports.h Normal file
View File

@ -0,0 +1,11 @@
#ifndef __PORTS_H__
#define __PORTS_H__
template<class P>
class PortDevice {
public:
virtual void out(word p, byte v, P *cpu) =0;
virtual byte in(word p, P *cpu) =0;
};
#endif

1
r6502.h
View File

@ -16,7 +16,6 @@ public:
r6502 (Memory &, jmp_buf &, CPU::statfn);
private:
/* registers */
Memory::address PC;
byte S, A, X, Y;
byte N, V, B, D, I, Z, C;
union {

4
spiram.cpp
View File

@ -21,7 +21,7 @@ spiram::operator byte()
void spiram::checkpoint(Stream &s)
{
byte buf[Memory::page_size];
for (int i = 0; i < pages(); i++) {
for (unsigned i = 0; i < pages(); i++) {
spiRam.read_stream(i * 256, buf, sizeof(buf));
s.write(buf, sizeof(buf));
}
@ -30,7 +30,7 @@ void spiram::checkpoint(Stream &s)
void spiram::restore(Stream &s)
{
byte buf[Memory::page_size];
for (int i = 0; i < pages(); i++) {
for (unsigned i = 0; i < pages(); i++) {
s.readBytes((char *)buf, sizeof(buf));
spiRam.write_stream(i * 256, buf, sizeof(buf));
}