Emulator: separated terminal and status windows
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@ -12,6 +12,10 @@
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#define ROM_SIZE 0x8000 /* 32 KiB */
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#define MEMORY_SIZE 0xFFFF /* 64 KiB */
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#define TERMINAL_WIDTH 60
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#define TERMINAL_HEIGHT 25
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#define SPACING_BETWEEN_WINDOWS 3
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#define INSTRUCTION_WINDOW_HEIGHT 3
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typedef struct {
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void* context;
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@ -23,6 +27,8 @@ typedef struct {
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zusize cycles;
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zuint8 memory[65536];
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Z80 cpu;
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WINDOW *terminal_win;
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WINDOW *status_win;
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} Machine;
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@ -47,44 +53,59 @@ static zuint8 machine_cpu_in(Machine *self, zuint16 port) {
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if (decoded <= 0x1F) {
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// Port 0 (0x00 to 0x1F): terminal
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// Read char from stin
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return getch();
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char c = getch();
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// Intercept emulator commands
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switch (c) {
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case 27:
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// ESC: shutdown emulator
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exit(0); // TODO: Shutdown ncurses and emulator cleanly
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return 0;
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default:
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// Deliver keypress to pat80
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return c;
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}
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}
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if (decoded <= 0x3F) {
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// Port 1 (0x20 to 0x3F): sound card (sn76489)
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printw("\nsound_cmd[IN]: Not supported!\n");
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wprintw(self->status_win, "sound_cmd[IN]: Not supported!\n");
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return 0x00;
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}
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if (decoded <= 0x5F) {
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// Port 2 (0x40 to 0x5F)
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printw("IO_ERROR_IN: No device at port 2\n");
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wprintw(self->status_win, "IO_ERROR_IN: No device at port 2\n");
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return 0x00;
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}
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if (decoded <= 0x7F) {
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// Port 3 (0x60 to 0x7F)
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printw("IO_ERROR_IN: No device at port 3\n");
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wprintw(self->status_win, "IO_ERROR_IN: No device at port 3\n");
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return 0x00;
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}
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if (decoded <= 0x9F) {
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// Port 4 (0x80 to 0x9F)
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printw("IO_ERROR_IN: No device at port 4\n");
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wprintw(self->status_win, "IO_ERROR_IN: No device at port 4\n");
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return 0x00;
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}
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if (decoded <= 0x5F) {
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// Port 5 (0xA0 to 0xBF)
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printw("IO_ERROR_IN: No device at port 5\n");
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wprintw(self->status_win, "IO_ERROR_IN: No device at port 5\n");
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return 0x00;
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}
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if (decoded <= 0x5F) {
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// Port 6 (0xC0 to 0xDF)
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printw("IO_ERROR_IN: No device at port 6\n");
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wprintw(self->status_win, "IO_ERROR_IN: No device at port 6\n");
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return 0x00;
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}
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if (decoded <= 0x5F) {
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// Port 7 (0xE0 to 0xFF)
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printw("IO_ERROR_IN: No device at port 7\n");
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wprintw(self->status_win, "IO_ERROR_IN: No device at port 7\n");
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} else {
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printw("IO_ERROR_IN: Invalid port address: %#04x\n", port);
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wprintw(self->status_win, "IO_ERROR_IN: Invalid port address: %#04x\n", port);
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}
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// TODO: place this in a refresh cycle between CPU instructions
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refresh();
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wrefresh(self->terminal_win);
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wrefresh(self->status_win);
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}
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@ -97,33 +118,36 @@ static void machine_cpu_out(Machine *self, zuint16 port, zuint8 value) {
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int decoded = port & bitmask;
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if (decoded <= 0x1F) {
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// Port 0 (0x00 to 0x1F): terminal
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attron(A_BOLD);
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printw("%c", value);
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attroff(A_BOLD);
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wprintw(self->terminal_win, "%c", value);
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} else if (decoded <= 0x3F) {
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// Port 1 (0x20 to 0x3F): sound card (sn76489)
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printw("\nsound_cmd[%#04x]\n", value);
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wprintw(self->status_win, "sound_cmd[%#04x]\n", value);
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} else if (decoded <= 0x5F) {
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// Port 2 (0x40 to 0x5F)
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printw("IO_ERROR_OUT: No device at port 2\n");
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wprintw(self->status_win, "IO_ERROR_OUT: No device at port 2\n");
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} else if (decoded <= 0x7F) {
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// Port 3 (0x60 to 0x7F)
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printw("IO_ERROR_OUT: No device at port 3\n");
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wprintw(self->status_win, "IO_ERROR_OUT: No device at port 3\n");
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} else if (decoded <= 0x9F) {
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// Port 4 (0x80 to 0x9F)
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printw("IO_ERROR_OUT: No device at port 4\n");
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wprintw(self->status_win, "IO_ERROR_OUT: No device at port 4\n");
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} else if (decoded <= 0x5F) {
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// Port 5 (0xA0 to 0xBF)
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printw("IO_ERROR_OUT: No device at port 5\n");
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wprintw(self->status_win, "IO_ERROR_OUT: No device at port 5\n");
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} else if (decoded <= 0x5F) {
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// Port 6 (0xC0 to 0xDF)
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printw("IO_ERROR_OUT: No device at port 6\n");
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wprintw(self->status_win, "IO_ERROR_OUT: No device at port 6\n");
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} else if (decoded <= 0x5F) {
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// Port 7 (0xE0 to 0xFF)
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printw("IO_ERROR_OUT: No device at port 7\n");
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wprintw(self->status_win, "IO_ERROR_OUT: No device at port 7\n");
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} else {
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printw("IO_ERROR_OUT: Invalid port address: %#04x\n", port);
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wprintw(self->status_win, "IO_ERROR_OUT: Invalid port address: %#04x\n", port);
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}
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// TODO: place this in a refresh cycle between CPU instructions
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refresh();
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wrefresh(self->terminal_win);
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wrefresh(self->status_win);
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}
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@ -177,13 +201,36 @@ int main(int argc, char *argv[]) {
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}
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char* romFilePath = argv[1];
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// Init ncurses
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initscr(); // Start curses mode
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raw(); // Line buffering disabled (get character without waiting for ENTER key)
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keypad(stdscr, TRUE); // We get F1, F2 etc..
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noecho(); // Don't echo() while we do getch
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start_color(); // Use colors
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init_pair(1, COLOR_WHITE, COLOR_BLUE); // Terminal window color
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init_pair(2, COLOR_YELLOW, COLOR_BLACK); // Status window color
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int x,y;
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getmaxyx(stdscr, y,x);
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// Setup virtual Pat80 computer
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Z80 pat80Cpu = {};
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Machine pat80 = {
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/*zusize*/ .cycles = 0,
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/*Z80*/ .cpu = pat80Cpu
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/*Z80*/ .cpu = pat80Cpu,
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.terminal_win = newwin(TERMINAL_HEIGHT, TERMINAL_WIDTH, INSTRUCTION_WINDOW_HEIGHT, 0),
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.status_win = newwin(y, x - TERMINAL_WIDTH - SPACING_BETWEEN_WINDOWS, INSTRUCTION_WINDOW_HEIGHT, TERMINAL_WIDTH + SPACING_BETWEEN_WINDOWS)
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};
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wbkgd(pat80.terminal_win, COLOR_PAIR(1)); // Ncurses: set terminal window color
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wbkgd(pat80.status_win, COLOR_PAIR(2));
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scrollok(pat80.terminal_win, TRUE); // Ncurses: Allow scrolling when reached end of window
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scrollok(pat80.status_win, TRUE);
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attron(A_BOLD); // Print instructions
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printw("Emulator commands\n");
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attroff(A_BOLD);
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printw("ESC: Exit");
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machine_initialize(&pat80);
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machine_power(&pat80, Z_TRUE);
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@ -197,18 +244,13 @@ int main(int argc, char *argv[]) {
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fread(&pat80.memory,ROM_SIZE,1,romFile); // load rom from file into memory, up >
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fclose(romFile);
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// Init ncurses
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initscr(); // Start curses mode
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raw(); // Line buffering disabled (get character without waiting for ENTER key)
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keypad(stdscr, TRUE); // We get F1, F2 etc..
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noecho(); // Don't echo() while we do getch
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scrollok(stdscr, TRUE); // Allow scrolling when reached end of window
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// Start emulated computer
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machine_reset(&pat80);
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machine_run(&pat80);
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// Stop ncurses
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endwin(); /* End curses mode */
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delwin(pat80.terminal_win);
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delwin(pat80.status_win);
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endwin();
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return 0;
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}
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