From bf91ff680d86339637232da5691b592f64899c5a Mon Sep 17 00:00:00 2001
From: Daniele Verducci <daniele.verducci@ichibi.eu>
Date: Tue, 18 Feb 2025 08:48:25 +0100
Subject: [PATCH] Added LCD window

---
 pat80-emulator/main.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/pat80-emulator/main.c b/pat80-emulator/main.c
index d2d99ba..634bbeb 100644
--- a/pat80-emulator/main.c
+++ b/pat80-emulator/main.c
@@ -29,6 +29,7 @@ typedef struct {
         Z80     cpu;
         WINDOW  *terminal_win;
         WINDOW  *status_win;
+        WINDOW  *lcd_win;
 } Machine;
 
 
@@ -106,6 +107,7 @@ static zuint8 machine_cpu_in(Machine *self, zuint16 port) {
         refresh();
         wrefresh(self->terminal_win);
         wrefresh(self->status_win);
+        wrefresh(self->lcd_win);
 }
 
 
@@ -123,8 +125,8 @@ static void machine_cpu_out(Machine *self, zuint16 port, zuint8 value) {
                 // Port 1 (0x20 to 0x3F): sound card (sn76489)
 		wprintw(self->status_win, "sound_cmd[%#04x]\n", value);
         } else if (decoded <= 0x5F) {
-                // Port 2 (0x40 to 0x5F)
-                wprintw(self->status_win, "IO_ERROR_OUT: No device at port 2\n");
+                // Port 2 (0x40 to 0x5F): lcd display 40x4 (mod. TM404A, based on 2 KS0066 chips, each one controlling 2 rows)
+		wprintw(self->lcd_win, "%c", value);
         } else if (decoded <= 0x7F) {
                 // Port 3 (0x60 to 0x7F)
                 wprintw(self->status_win, "IO_ERROR_OUT: No device at port 3\n");
@@ -148,6 +150,7 @@ static void machine_cpu_out(Machine *self, zuint16 port, zuint8 value) {
         refresh();
         wrefresh(self->terminal_win);
         wrefresh(self->status_win);
+        wrefresh(self->lcd_win);
 }
 
 
@@ -210,6 +213,7 @@ int main(int argc, char *argv[]) {
         start_color();                  // Use colors
         init_pair(1, COLOR_WHITE, COLOR_BLUE); // Terminal window color
         init_pair(2, COLOR_YELLOW, COLOR_BLACK); // Status window color
+        init_pair(3, COLOR_BLACK, COLOR_GREEN); // LCD window color
         int x,y;
         getmaxyx(stdscr, y,x);
 
@@ -219,13 +223,16 @@ int main(int argc, char *argv[]) {
                 /*zusize*/  .cycles = 0,
                 /*Z80*/     .cpu = pat80Cpu,
                 .terminal_win = newwin(TERMINAL_HEIGHT, TERMINAL_WIDTH, INSTRUCTION_WINDOW_HEIGHT, 0),
-                .status_win = newwin(y, x - TERMINAL_WIDTH - SPACING_BETWEEN_WINDOWS, INSTRUCTION_WINDOW_HEIGHT, TERMINAL_WIDTH + SPACING_BETWEEN_WINDOWS)
+                .status_win = newwin(y, x - TERMINAL_WIDTH - SPACING_BETWEEN_WINDOWS, INSTRUCTION_WINDOW_HEIGHT, TERMINAL_WIDTH + SPACING_BETWEEN_WINDOWS), // To right of terminal window
+                .lcd_win = newwin(4, 40, INSTRUCTION_WINDOW_HEIGHT + TERMINAL_HEIGHT + SPACING_BETWEEN_WINDOWS, 0)  // Below terminal window
         };
 
         wbkgd(pat80.terminal_win, COLOR_PAIR(1));       // Ncurses: set terminal window color
         wbkgd(pat80.status_win, COLOR_PAIR(2));
+        wbkgd(pat80.lcd_win, COLOR_PAIR(3));
         scrollok(pat80.terminal_win, TRUE);             // Ncurses: Allow scrolling when reached end of window
         scrollok(pat80.status_win, TRUE);
+        scrollok(pat80.lcd_win, FALSE);
         attron(A_BOLD);                                 // Print instructions
         printw("Emulator commands\n");
         attroff(A_BOLD);
@@ -251,6 +258,7 @@ int main(int argc, char *argv[]) {
         // Stop ncurses
         delwin(pat80.terminal_win);
         delwin(pat80.status_win);
+        delwin(pat80.lcd_win);
         endwin();
         return 0;
 }