6502
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perfect6502
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emulator / tester work

This commit is contained in:
Michael Steil 2010-09-30 02:39:11 +00:00
parent 5b43898aae
commit f101c89980
2 changed files with 43 additions and 27 deletions
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2
Makefile
View File

@ -1,4 +1,4 @@
OBJS=runtime.o plugin.o perfect6502.o console.o
OBJS=runtime.o plugin.o perfect6502.o console.o emu.o
CFLAGS=-Wall -O3
CC=clang

68
perfect6502.c
View File

@ -20,7 +20,7 @@
THE SOFTWARE.
*/
int verbose = 1;
int verbose = 0;
//#define TEST
//#define BROKEN_TRANSISTORS
@ -1001,7 +1001,7 @@ setupNodesAndTransistors()
}
void
initChip()
resetChip()
{
/* all nodes are floating */
for (nodenum_t nn = 0; nn < NODES; nn++) {
@ -1165,7 +1165,7 @@ main()
* find out length of instruction in bytes
**************************************************/
setup_memory(opcode);
initChip();
resetChip();
int i;
for (i = 0; i < MAX_CYCLES; i++) {
step();
@ -1184,7 +1184,7 @@ main()
* find out length of instruction in cycles
**************************************************/
setup_memory(opcode);
initChip();
resetChip();
for (i = 0; i < MAX_CYCLES; i++) {
step();
if ((readNOTIR() ^ 0xFF) == 0x00)
@ -1202,7 +1202,7 @@ main()
memory[MAGIC_8 + X_OFFSET + 1] = MAGIC_IZX >> 8;
memory[MAGIC_8 + 0] = MAGIC_IZY & 0xFF;
memory[MAGIC_8 + 1] = MAGIC_IZY >> 8;
initChip();
resetChip();
if (data[opcode].length == 2) {
memory[INSTRUCTION_ADDR + 1] = MAGIC_8;
} else if (data[opcode].length == 3) {
@ -1336,7 +1336,7 @@ main()
memory[MAGIC_16] = MAGIC_DATA8;
break;
}
initChip();
resetChip();
writes = 0;
reads = 0;
for (i = 0; i < data[opcode].cycles * 2 + 2; i++) {
@ -1487,7 +1487,7 @@ main()
memory[MAGIC_16] = MAGIC_DATA8;
break;
}
initChip();
resetChip();
for (i = 0; i < data[opcode].cycles * 2 + 2; i++) {
step();
};
@ -1621,7 +1621,7 @@ main()
bzero(memory, 65536);
init_monitor();
initChip();
resetChip();
BOOL fail = NO;
for (int c = 0; c < MAX_CYCLES; c++) {
step();
@ -1744,26 +1744,24 @@ enum {
STATE_FIRST_FETCH
};
int
main()
void
setup_perfect()
{
setupNodesAndTransistors();
verbose = 0;
}
// printf("$%02X: ", opcode);
/**************************************************
* find out length of instruction in bytes
**************************************************/
setup_memory(1, 0xEA, 0x00, 0x00, 0, 0, 0, 0, 0);
// setup_memory(2, 0xA9, 0x00, 0x00, 0, 0, 0, 0, 0);
// setup_memory(3, 0xFE, 0x00, 0x10, 0, 0, 0, 0, 0);
initChip();
extern void setup_emu(void);
uint16_t instr_ab[10];
uint8_t instr_db[10];
BOOL instr_rw[10];
int
perfect_measure_instruction()
{
int state = STATE_BEFORE_INSTRUCTION;
uint16_t instr_ab[10];
uint8_t instr_db[10];
BOOL instr_rw[10];
int c = 0;
for (int i = 0; i < MAX_CYCLES; i++) {
uint16_t ab;
@ -1794,15 +1792,33 @@ main()
}
};
int instr_cycles = c - 1;
for (c = 0; c < instr_cycles; c++ ) {
printf("%d T%d ", state, c);
return c - 1;
}
int
main()
{
setup_perfect();
// setup_memory(1, 0xEA, 0x00, 0x00, 0, 0, 0, 0, 0);
// setup_memory(2, 0xA9, 0x00, 0x00, 0, 0, 0, 0, 0);
// setup_memory(2, 0xAD, 0x00, 0x10, 0, 0, 0, 0, 0);
setup_memory(3, 0xFE, 0x00, 0x10, 0, 0, 0, 0, 0);
// setup_memory(3, 0x9D, 0xFF, 0x10, 0, 2, 0, 0, 0);
resetChip();
int instr_cycles = perfect_measure_instruction();
for (int c = 0; c < instr_cycles; c++ ) {
printf("T%d ", c+1);
if (instr_rw[c])
printf("R $%04X\n", instr_ab[c]);
else
printf("W $%04X = $%02X\n", instr_ab[c], instr_db[c]);
}
setup_emu();
}
#else
int
@ -1813,7 +1829,7 @@ main()
/* set up memory for user program */
init_monitor();
/* set initial state of nodes, transistors, inputs; RESET chip */
initChip();
resetChip();
/* emulate the 6502! */
for (;;) {
step();