From 8ec080d0cd9fd62c0de20780581a4750d078ea94 Mon Sep 17 00:00:00 2001
From: alekseiplusplus <alekseijeaves@protonmail.com>
Date: Fri, 1 Dec 2023 02:56:13 +1100
Subject: progress, still WIP

---
 src/apple.c            |  2 +-
 src/cpu/6502.c         | 14 ++++++--------
 src/cpu/instructions.c |  2 +-
 src/video/ncurses.c    | 19 +++++++++++--------
 src/video/signetics.c  |  8 ++++++--
 5 files changed, 25 insertions(+), 20 deletions(-)

diff --git a/src/apple.c b/src/apple.c
index 6f48c10..6c977a2 100644
--- a/src/apple.c
+++ b/src/apple.c
@@ -108,7 +108,7 @@ void SetMemory(address x, byte y){
 	switch(x)
 		{
 		case DSP:
-
+			TerminalInput(y);
 		}
 	if (x < MEMORY_SIZE) {
 		Memory[x] = y;
diff --git a/src/cpu/6502.c b/src/cpu/6502.c
index ab8248e..366882f 100644
--- a/src/cpu/6502.c
+++ b/src/cpu/6502.c
@@ -40,15 +40,13 @@ void SetFlagN(byte x){
 	P = (x & flag_N) | (P & ~flag_N);
 }
 
-//Perform prior to any changes
+//Perform prior to any changes TODO: FIX THIS! WTF WERE YOU THINKING?
 void SetFlagV(byte x, byte y){
-	if ((x & flag_N) == (y & flag_N)){
-		if (((x + y) & (flag_N ^ 0xFF)) > 0x7F) SetFlag(flag_V, 1);
-		else SetFlag(flag_V, 0);
-	}else{
-		if (((x - y) & (flag_N ^ 0xFF)) > 0x7F) SetFlag(flag_V, 1);
-		else SetFlag(flag_V, 0);
-	}
+	address z = (address)x + (address)y;
+	if (z > 0xFF)
+		SetFlag(flag_V, 1);
+	else
+		SetFlag(flag_V, 0);
 }
 
 /*void SetFlagB(){ //WORK ON
diff --git a/src/cpu/instructions.c b/src/cpu/instructions.c
index c043ac4..cf69fc2 100644
--- a/src/cpu/instructions.c
+++ b/src/cpu/instructions.c
@@ -136,7 +136,7 @@ void fEOR(Addressing addr, address val){
 // Jump, Branch, Compare, and Test Bits
 
 void fJMP(Addressing addr, address val){
-	PC = val;
+	PC = val; PC -= 2;
 }
 
 void fBCC(Addressing addr, address val){	//FINISH ALL BRANCH INSTRUCTIONS
diff --git a/src/video/ncurses.c b/src/video/ncurses.c
index e4a7613..0e261bb 100644
--- a/src/video/ncurses.c
+++ b/src/video/ncurses.c
@@ -23,12 +23,15 @@ byte UserInput()
 	switch(c)
 	{
 	// Convert special characters
-	case KEY_BACKSPACE:
+	case KEY_F(1): //backspace
 		r = 0xDF;
-	case KEY_ENTER:
+		break;
+	case KEY_F(2): //enter
 		r = 0x8D;
-	case KEY_EXIT: //TODO: Figure out if this is Esc or not.
+		break;
+	case KEY_F(3): //exit. TODO: Figure out if this is Esc or not.
 		r = 0x9B;
+		break;
 	// Convert regular characters
 	default:
 		if (c < 0x20 || c >= 0x60)
@@ -42,13 +45,13 @@ byte UserInput()
 		break;
 	}
 
-	SetMemory(KBD, r);
+	//SetMemory(KBD, r);
 
 	
-	TerminalInput(r);
+	//TerminalInput(r);
 	
 
-	return c;
+	return r;
 }
 
 
@@ -135,7 +138,7 @@ void TerminalInput(byte n)
 {	
 	// Place character
     mvwaddch(AppleWindow, TermY, TermX, ' ');
-    mvwaddch(AppleWindow, TermY, TermX, CharacterROM[n]);
+    mvwaddch(AppleWindow, TermY, TermX, CharacterROM(n));
 	
 	// Add character to register
     *TerminalShiftRegisterPosition = n;
@@ -168,7 +171,7 @@ void TerminalInput(byte n)
         for (int j = 0; j < 40; j++) {
             if (offset >= (TerminalShiftRegister + 960))
                 offset -= TerminalShiftRegister;
-            mvwaddch(AppleWindow, i, j, CharacterROM[*offset] );
+            mvwaddch(AppleWindow, i, j, CharacterROM(*offset) );
             offset++;
         }}
 		
diff --git a/src/video/signetics.c b/src/video/signetics.c
index 09e9836..3dd279b 100644
--- a/src/video/signetics.c
+++ b/src/video/signetics.c
@@ -2,15 +2,19 @@
 //	Signetics refers to the various Signetics brand chips which the Apple I came with, including a character ROM, and a shift-register based video memory.
 //  Intended to be included during pre-processing into the .c of the used video library.
 
-const byte CharacterROM[0x40] = {
+const byte SigneticsROM[0x40] = {
 	'@' , 'A' , 'B' , 'C' , 'D' , 'E' , 'F' , 'G' , 'H' , 'I' , 'J' , 'K' , 'L' , 'M' , 'N' , 'O' ,
 	'P' , 'Q' , 'R' , 'S' , 'T' , 'U' , 'V' , 'W' , 'X' , 'Y' , 'Z' , '[' , '\\', ']' , '^' , '_' ,
 	' ' , '!' , '"' , '#' , '$' , '%' , '&' , '\'', '(' , ')' , '*' , '+' , ',' , '-' , '.' , '/' ,
 	'0' , '1' , '2' , '3' , '4' , '5' , '6' , '7' , '8' , '9' , ':' , ';' , '<' , '=' , '>' , '?'
 };
 
+byte CharacterROM(byte x) {
+	return SigneticsROM[ x & 0b01111111 ];
+}
+
 const byte* TerminalShiftRegister;
 
 byte* TerminalShiftRegisterPosition;
 
-int TerminalShiftRegisterOffset;
\ No newline at end of file
+int TerminalShiftRegisterOffset;
-- 
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