From 70937cd61f63e159d5de226fa640d102c8fb0d14 Mon Sep 17 00:00:00 2001
From: vin <git@vineetk.net>
Date: Sat, 20 Jul 2024 20:27:55 -0400
Subject: [PATCH] replace tabs with spaces to better match nestest.log

---
 cpu.c | 63 ++++++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 43 insertions(+), 20 deletions(-)

diff --git a/cpu.c b/cpu.c
index 4b55818..a4be93c 100644
--- a/cpu.c
+++ b/cpu.c
@@ -841,8 +841,8 @@ XAS(uint16_t arg)
 static void
 interpret(void)
 {
-	uint8_t op;
-	uint16_t arg, mem, deref;
+	uint8_t op, spaces;
+	uint16_t arg;
 	enum addressing_mode mode;
 
 	for (;;) {
@@ -854,16 +854,13 @@ interpret(void)
 		for (uint8_t i = 0; i < opcodes[op].bytes - 1; i++)
 			printf(" %02X", peek(regs.pc + i));
 
-		if (opcodes[op].unofficial) {
-			if (opcodes[op].bytes == 1)
-				printf("       ");
-			else if (opcodes[op].bytes == 2)
-				printf("    ");
-			else if (opcodes[op].bytes == 3)
-				putchar(' ');
-			putchar('*');
-		} else
-			putchar('\t');
+		if (opcodes[op].bytes == 1)
+			printf("       ");
+		else if (opcodes[op].bytes == 2)
+			printf("    ");
+		else if (opcodes[op].bytes == 3)
+			putchar(' ');
+		putchar((opcodes[op].unofficial) ? '*' : ' ');
 		printf("%s ", opcodes[op].name);
 
 		mode = opcodes[op].mode;
@@ -896,27 +893,53 @@ interpret(void)
 			printf("($%04X) = %04X", arg, peek16(arg));
 			break;
 		case AM_IND_X:
-			printf("($%02X,X) @ %02X = %04X", peek(regs.pc - 1), peek(regs.pc - 1) + regs.x, arg);
+			printf("($%02X,X) @ %02X = %04X", peek(regs.pc - 1), (peek(regs.pc - 1) + regs.x) & 0xFF, arg);
 			break;
 		case AM_IND_Y:
 			printf("($%02X),Y = %04X @ %04X", peek(regs.pc - 1), (uint16_t)(arg - regs.y), arg);
 			break;
 		case AM_ACC:
 		case AM_NONE:
-			putchar('\t');
-			break;
-		default:
-			printf("\t\t\t\t");
+			printf("    ");
 			break;
 		}
 
+		spaces = 9;
+
 		if (opcodes[op].memread || opcodes[op].memwrite)
 			printf(" = %02X", peek(arg));
+		else
+			spaces += 5;
 
 		if (mode != AM_IND && mode != AM_ABS_X && mode != AM_ABS_Y)
-			putchar('\t');
-		if (mode != AM_IND_X && mode != AM_IND_Y)
-			printf("\t\t");
+			spaces += 7;
+
+		switch (opcodes[op].mode) {
+		case AM_IND_X:
+			spaces -= 12;
+			break;
+		case AM_IND_Y:
+			spaces -= 14;
+			break;
+		case AM_ZP:
+			spaces += 4;
+			break;
+		case AM_ZP_X:
+		case AM_ZP_Y:
+		case AM_REL:
+		case AM_ABS:
+			spaces += 2;
+			break;
+		case AM_IMM:
+		case AM_ACC:
+		case AM_NONE:
+			spaces += 3;
+			break;
+		default:
+			break;
+		}
+
+		while (spaces--) putchar(' ');
 
 		printf("A:%02X X:%02X Y:%02X P:%02X SP:%02X CYC:%d\n",
 		    regs.a, regs.x, regs.y, STATUS_TO_INT(), regs.sp, cycles);