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Diffstat (limited to 'src/emu/cpu/i4004/i4004.c')
-rw-r--r--src/emu/cpu/i4004/i4004.c138
1 files changed, 69 insertions, 69 deletions
diff --git a/src/emu/cpu/i4004/i4004.c b/src/emu/cpu/i4004/i4004.c
index 8fd9a882aaf..af76a239b36 100644
--- a/src/emu/cpu/i4004/i4004.c
+++ b/src/emu/cpu/i4004/i4004.c
@@ -2,8 +2,8 @@
*
* i4004.c
*
- * Intel 4004 CPU
- *
+ * Intel 4004 CPU
+ *
* Initial version by Miodrag Milanovic
*
*****************************************************************************/
@@ -57,7 +57,7 @@ static const cpu_state_entry state_array[] =
{
I4004_STATE_ENTRY(PC, "%03X", PC.w.l, 0x0fff, 0)
I4004_STATE_ENTRY(GENPC,"%03X", PC.w.l, 0x0fff, CPUSTATE_NOSHOW)
- I4004_STATE_ENTRY(A, "%01X", A, 0x0f, 0)
+ I4004_STATE_ENTRY(A, "%01X", A, 0x0f, 0)
I4004_STATE_ENTRY(R01, "%02X", R[0], 0xff, 0)
I4004_STATE_ENTRY(R23, "%02X", R[1], 0xff, 0)
I4004_STATE_ENTRY(R45, "%02X", R[2], 0xff, 0)
@@ -164,7 +164,7 @@ INLINE UINT8 GET_REG(i4004_state *cpustate, UINT8 num)
{
UINT8 r = cpustate->R[num>>1];
if (num & 1) {
- return r & 0x0f;
+ return r & 0x0f;
} else {
return (r >> 4) & 0x0f;
}
@@ -187,7 +187,7 @@ INLINE void PUSH_STACK(i4004_state *cpustate)
INLINE void POP_STACK(i4004_state *cpustate)
{
cpustate->ADDR[cpustate->pc_pos].d = 0;
- cpustate->pc_pos = (cpustate->pc_pos - 1) & cpustate->addr_mask;
+ cpustate->pc_pos = (cpustate->pc_pos - 1) & cpustate->addr_mask;
}
void i4004_set_test(const device_config *device, UINT8 val)
@@ -202,91 +202,91 @@ static void execute_one(i4004_state *cpustate, int opcode)
switch (opcode)
{
case 0x00: /* NOP */
- /* no op */
+ /* no op */
break;
- case 0x10: case 0x11: case 0x12: case 0x13:
- case 0x14: case 0x15: case 0x16: case 0x17:
- case 0x18: case 0x19: case 0x1a: case 0x1b:
+ case 0x10: case 0x11: case 0x12: case 0x13:
+ case 0x14: case 0x15: case 0x16: case 0x17:
+ case 0x18: case 0x19: case 0x1a: case 0x1b:
case 0x1c: case 0x1d: case 0x1e: case 0x1f: /* JCN */
{
UINT8 arg = ARG(cpustate);
-
+
UINT8 C1 = BIT(opcode,3);
UINT8 C2 = BIT(opcode,2);
UINT8 C3 = BIT(opcode,1);
UINT8 C4 = BIT(opcode,0);
UINT8 JUMP = (((cpustate->A == 0) ? 1 : 0) & C2) | ((cpustate->C) & C3) | ((cpustate->TEST ^ 1) & C4);
cpustate->icount -= 8;
-
+
if(((C1 ^ 1) & JUMP) | (C1 & (JUMP ^ 1))) {
GET_PC.w.l = (GET_PC.w.l & 0x0f00) | arg;
cpustate->PC = GET_PC;
}
}
break;
- case 0x20: case 0x22: case 0x24: case 0x26:
+ case 0x20: case 0x22: case 0x24: case 0x26:
case 0x28: case 0x2a: case 0x2c: case 0x2e: /* FIM */
cpustate->icount -= 8;
cpustate->R[(opcode & 0x0f)>>1] = ROP(cpustate);
break;
- case 0x21: case 0x23: case 0x25: case 0x27:
+ case 0x21: case 0x23: case 0x25: case 0x27:
case 0x29: case 0x2b: case 0x2d: case 0x2f: /* SRC */
- cpustate->RAM.b.l = cpustate->R[(opcode & 0x0f)>>1];
+ cpustate->RAM.b.l = cpustate->R[(opcode & 0x0f)>>1];
break;
- case 0x30: case 0x32: case 0x34: case 0x36:
+ case 0x30: case 0x32: case 0x34: case 0x36:
case 0x38: case 0x3a: case 0x3c: case 0x3e: /* FIN */
cpustate->icount -= 8;
cpustate->R[(opcode & 0x0f)>>1] = READ_ROM(cpustate);
break;
- case 0x31: case 0x33: case 0x35: case 0x37:
+ case 0x31: case 0x33: case 0x35: case 0x37:
case 0x39: case 0x3b: case 0x3d: case 0x3f: /* JIN */
GET_PC.w.l = (GET_PC.w.l & 0x0f00) | cpustate->R[(opcode & 0x0f)>>1];
cpustate->PC = GET_PC;
break;
- case 0x40: case 0x41: case 0x42: case 0x43:
- case 0x44: case 0x45: case 0x46: case 0x47:
- case 0x48: case 0x49: case 0x4a: case 0x4b:
+ case 0x40: case 0x41: case 0x42: case 0x43:
+ case 0x44: case 0x45: case 0x46: case 0x47:
+ case 0x48: case 0x49: case 0x4a: case 0x4b:
case 0x4c: case 0x4d: case 0x4e: case 0x4f: /* JUN */
cpustate->icount -= 8;
GET_PC.w.l = ((opcode & 0x0f) << 8) | ARG(cpustate);
cpustate->PC = GET_PC;
break;
- case 0x50: case 0x51: case 0x52: case 0x53:
- case 0x54: case 0x55: case 0x56: case 0x57:
- case 0x58: case 0x59: case 0x5a: case 0x5b:
+ case 0x50: case 0x51: case 0x52: case 0x53:
+ case 0x54: case 0x55: case 0x56: case 0x57:
+ case 0x58: case 0x59: case 0x5a: case 0x5b:
case 0x5c: case 0x5d: case 0x5e: case 0x5f: /* JMS */
{
UINT16 newPC = ((opcode & 0x0f) << 8) | ARG(cpustate);
- cpustate->icount -= 8;
+ cpustate->icount -= 8;
PUSH_STACK(cpustate);
GET_PC.w.l = newPC;
cpustate->PC = GET_PC;
}
break;
- case 0x60: case 0x61: case 0x62: case 0x63:
- case 0x64: case 0x65: case 0x66: case 0x67:
- case 0x68: case 0x69: case 0x6a: case 0x6b:
+ case 0x60: case 0x61: case 0x62: case 0x63:
+ case 0x64: case 0x65: case 0x66: case 0x67:
+ case 0x68: case 0x69: case 0x6a: case 0x6b:
case 0x6c: case 0x6d: case 0x6e: case 0x6f: /* INC */
SET_REG(cpustate, opcode & 0x0f, GET_REG(cpustate, opcode & 0x0f) + 1);
break;
- case 0x70: case 0x71: case 0x72: case 0x73:
- case 0x74: case 0x75: case 0x76: case 0x77:
- case 0x78: case 0x79: case 0x7a: case 0x7b:
+ case 0x70: case 0x71: case 0x72: case 0x73:
+ case 0x74: case 0x75: case 0x76: case 0x77:
+ case 0x78: case 0x79: case 0x7a: case 0x7b:
case 0x7c: case 0x7d: case 0x7e: case 0x7f: /* ISZ */
- {
+ {
UINT8 val = (GET_REG(cpustate, opcode & 0x0f) + 1) & 0xf;
UINT16 addr = ARG(cpustate);
cpustate->icount -= 8;
- SET_REG(cpustate, opcode & 0x0f, val);
+ SET_REG(cpustate, opcode & 0x0f, val);
if (val!=0) {
- GET_PC.w.l = (GET_PC.w.l & 0x0f00) | addr;
- }
- cpustate->PC = GET_PC;
+ GET_PC.w.l = (GET_PC.w.l & 0x0f00) | addr;
+ }
+ cpustate->PC = GET_PC;
}
break;
- case 0x80: case 0x81: case 0x82: case 0x83:
- case 0x84: case 0x85: case 0x86: case 0x87:
- case 0x88: case 0x89: case 0x8a: case 0x8b:
+ case 0x80: case 0x81: case 0x82: case 0x83:
+ case 0x84: case 0x85: case 0x86: case 0x87:
+ case 0x88: case 0x89: case 0x8a: case 0x8b:
case 0x8c: case 0x8d: case 0x8e: case 0x8f: /* ADD */
{
UINT8 acc = cpustate->A + GET_REG(cpustate, opcode & 0x0f) + cpustate->C;
@@ -294,47 +294,47 @@ static void execute_one(i4004_state *cpustate, int opcode)
cpustate->C = (acc >> 4) & 1;
}
break;
- case 0x90: case 0x91: case 0x92: case 0x93:
- case 0x94: case 0x95: case 0x96: case 0x97:
- case 0x98: case 0x99: case 0x9a: case 0x9b:
+ case 0x90: case 0x91: case 0x92: case 0x93:
+ case 0x94: case 0x95: case 0x96: case 0x97:
+ case 0x98: case 0x99: case 0x9a: case 0x9b:
case 0x9c: case 0x9d: case 0x9e: case 0x9f: /* SUB */
{
UINT8 acc = cpustate->A + (GET_REG(cpustate, opcode & 0x0f) ^ 0x0f) + (cpustate->C ^ 1);
- cpustate->A = acc & 0x0f;
+ cpustate->A = acc & 0x0f;
cpustate->C = (acc >> 4) & 1;
}
break;
- case 0xa0: case 0xa1: case 0xa2: case 0xa3:
- case 0xa4: case 0xa5: case 0xa6: case 0xa7:
- case 0xa8: case 0xa9: case 0xaa: case 0xab:
+ case 0xa0: case 0xa1: case 0xa2: case 0xa3:
+ case 0xa4: case 0xa5: case 0xa6: case 0xa7:
+ case 0xa8: case 0xa9: case 0xaa: case 0xab:
case 0xac: case 0xad: case 0xae: case 0xaf: /* LD */
cpustate->A = GET_REG(cpustate, opcode & 0x0f);
break;
- case 0xb0: case 0xb1: case 0xb2: case 0xb3:
- case 0xb4: case 0xb5: case 0xb6: case 0xb7:
- case 0xb8: case 0xb9: case 0xba: case 0xbb:
+ case 0xb0: case 0xb1: case 0xb2: case 0xb3:
+ case 0xb4: case 0xb5: case 0xb6: case 0xb7:
+ case 0xb8: case 0xb9: case 0xba: case 0xbb:
case 0xbc: case 0xbd: case 0xbe: case 0xbf: /* XCH */
{
UINT8 temp = cpustate->A;
cpustate->A = GET_REG(cpustate, opcode & 0x0f);
SET_REG(cpustate, opcode & 0x0f, temp);
- }
+ }
break;
- case 0xc0: case 0xc1: case 0xc2: case 0xc3:
- case 0xc4: case 0xc5: case 0xc6: case 0xc7:
- case 0xc8: case 0xc9: case 0xca: case 0xcb:
- case 0xcc: case 0xcd: case 0xce: case 0xcf: /* BBL */
+ case 0xc0: case 0xc1: case 0xc2: case 0xc3:
+ case 0xc4: case 0xc5: case 0xc6: case 0xc7:
+ case 0xc8: case 0xc9: case 0xca: case 0xcb:
+ case 0xcc: case 0xcd: case 0xce: case 0xcf: /* BBL */
POP_STACK(cpustate);
cpustate->A = opcode & 0x0f;
cpustate->PC = GET_PC;
break;
- case 0xd0: case 0xd1: case 0xd2: case 0xd3:
- case 0xd4: case 0xd5: case 0xd6: case 0xd7:
- case 0xd8: case 0xd9: case 0xda: case 0xdb:
+ case 0xd0: case 0xd1: case 0xd2: case 0xd3:
+ case 0xd4: case 0xd5: case 0xd6: case 0xd7:
+ case 0xd8: case 0xd9: case 0xda: case 0xdb:
case 0xdc: case 0xdd: case 0xde: case 0xdf: /* LDM */
cpustate->A = opcode & 0x0f;
break;
- case 0xe0: /* WRM */
+ case 0xe0: /* WRM */
WM(cpustate,cpustate->A);
break;
case 0xe1: /* WMP */
@@ -366,14 +366,14 @@ static void execute_one(i4004_state *cpustate, int opcode)
case 0xe9: /* RDM */
cpustate->A = RM(cpustate);
break;
- case 0xea: /* RDR */
+ case 0xea: /* RDR */
cpustate->A = RIO(cpustate);
break;
case 0xeb: /* ADM */
cpustate->A += RM(cpustate) + cpustate->C;
cpustate->C = cpustate->A >> 4;
cpustate->A &= 0x0f;
- break;
+ break;
case 0xec: /* RD0 */
cpustate->A = RMS(cpustate,0);
break;
@@ -386,16 +386,16 @@ static void execute_one(i4004_state *cpustate, int opcode)
case 0xef: /* RD3 */
cpustate->A = RMS(cpustate,3);
break;
-
+
case 0xf0: /* CLB */
cpustate->A = 0;
cpustate->C = 0;
- break;
+ break;
case 0xf1: /* CLC */
cpustate->C = 0;
break;
case 0xf2: /* IAC */
- cpustate->A = cpustate->A++;
+ cpustate->A = cpustate->A++;
cpustate->C = cpustate->A >> 4;
cpustate->A &= 0x0f;
break;
@@ -424,7 +424,7 @@ static void execute_one(i4004_state *cpustate, int opcode)
case 0xf8: /* DAC */
cpustate->A = cpustate->A + 0x0f;
cpustate->C = cpustate->A >> 4;
- cpustate->A &= 0x0f;
+ cpustate->A &= 0x0f;
break;
case 0xf9: /* TCS */
cpustate->A = cpustate->C ? 10 : 9;
@@ -481,20 +481,20 @@ static CPU_EXECUTE( i4004 )
static CPU_INIT( i4004 )
{
i4004_state *cpustate = get_safe_token(device);
-
+
/* set up the state table */
cpustate->state = state_table_template;
cpustate->state.baseptr = cpustate;
cpustate->state.subtypemask = 1;
-
+
cpustate->device = device;
cpustate->program = memory_find_address_space(device, ADDRESS_SPACE_PROGRAM);
cpustate->data = memory_find_address_space(device, ADDRESS_SPACE_DATA);
cpustate->io = memory_find_address_space(device, ADDRESS_SPACE_IO);
-
+
state_save_register_device_item(device, 0, cpustate->PC);
- state_save_register_device_item(device, 0, cpustate->A);
+ state_save_register_device_item(device, 0, cpustate->A);
state_save_register_device_item(device, 0, cpustate->C);
state_save_register_device_item(device, 0, cpustate->TEST);
state_save_register_device_item(device, 0, cpustate->pc_pos);
@@ -509,8 +509,8 @@ static CPU_INIT( i4004 )
state_save_register_device_item(device, 0, cpustate->R[4]);
state_save_register_device_item(device, 0, cpustate->R[5]);
state_save_register_device_item(device, 0, cpustate->R[6]);
- state_save_register_device_item(device, 0, cpustate->R[7]);
- state_save_register_device_item(device, 0, cpustate->RAM);
+ state_save_register_device_item(device, 0, cpustate->R[7]);
+ state_save_register_device_item(device, 0, cpustate->RAM);
}
@@ -531,7 +531,7 @@ static CPU_RESET( i4004 )
memset(cpustate->ADDR,0,sizeof(cpustate->ADDR));
cpustate->RAM.d = 0;
cpustate->PC = GET_PC;
-
+
}