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// ncurses.c
// Implements interface.h
// Provides an in-terminal interface to the emulator.
#include<ncurses.h>
#include"interface.h"
#include"signetics.c"
#include"../apple.h"
#include"../cpu/6502.h"
int TermX = 0;
int TermY = 0;
WINDOW *AppleWindow;
byte UserInput()
{
int c = getch();
byte C;
switch(c)
{
// Convert special characters
case KEY_BACKSPACE:
C = 0xDF;
case KEY_ENTER:
C = 0x8D;
case KEY_EXIT: //TODO: Figure out if this is Esc or not.
C = 0x9B;
// Convert regular characters
default:
if (c < 0x20 || c >= 0x60)
return -1;
if (c >= 0x40)
C = c - 0x40;
else
C = c;
break;
}
SetMemory(KBD, C);
TerminalInput(c);
return c;
}
#define FlagVisual(x, c) (getFlag(x)) ? c : '.'
void PrintInfo()
{
move(2, 43);
printf("acc : %x", acc);
move(3, 43);
printf(" X : %x", X );
move(4, 43);
printf(" Y : %x", Y );
move(5, 43);
printf(" PC : %x", PC);
move(6, 43);
printf("Flags : %c%c_%c%c%c%c%c",
getFlag(flag_N) ? 'N':'.' ,
getFlag(flag_V) ? 'V':'.' ,
getFlag(flag_B) ? 'B':'.' ,
getFlag(flag_D) ? 'D':'.' ,
getFlag(flag_I) ? 'I':'.' ,
getFlag(flag_Z) ? 'Z':'.' ,
getFlag(flag_C) ? 'C':'.'
);
refresh();
}
void TerminalInit()
{
// ncurses initialization functions.
initscr();
cbreak();
noecho();
curs_set(0);
keypad(stdscr, TRUE);
// Draw decorative border.
attron(A_REVERSE);
move(0, 0);
printw(" ");
for (int i = 1; i <= 24; i++)
{
mvaddch(i, 0, ' ');
mvaddch(i, 41, ' ');
}
mvprintw(25, 0, " ~ ");
mvprintw(26, 0, " Alekseis Apple I ");
mvprintw(27, 0, " ");
attroff(A_REVERSE);
// Create seperate Apple screen window.
AppleWindow = newwin(24, 40, 1, 1);
// @ prompt.
mvwaddch(AppleWindow, TermY, TermX, '@' | A_BLINK);
// Initialize the terminal shift register variables.
TerminalShiftRegister = (byte*)malloc(960);
TerminalShiftRegisterPosition = TerminalShiftRegister;
TerminalShiftRegisterOffset = 0;
refresh();
}
void TerminalClose()
{
free(TerminalShiftRegister);
curs_set(1);
endwin();
}
void TerminalInput(byte n)
{
// Place character
mvwaddch(AppleWindow, TermY, TermX, ' ');
mvwaddch(AppleWindow, TermY, TermX, CharacterROM[n]);
// Add character to register
*TerminalShiftRegisterPosition = n;
TerminalShiftRegisterPosition++;
if (TerminalShiftRegisterPosition >= (TerminalShiftRegister + 960))
TerminalShiftRegisterPosition = TerminalShiftRegister;
TermX++;
// If X is past width..
if (TermX >= 40) {
//.. move to start of next line.
TermX = 0;
TermY++;
}
// If Y is past height..
if (TermY >= 24) {
//.. discard the first line..
TerminalShiftRegisterOffset += 40;
//.. verify the register offset..
if (TerminalShiftRegisterOffset >= 960)
TerminalShiftRegisterOffset = TerminalShiftRegister;
//.. and create an offset variable to cycle through memory with.
byte *offset = TerminalShiftRegister + TerminalShiftRegisterOffset;
// Then, for every cell of the screen, fill with the contents of the video memory.
for (int i = 0; i < 23; i++) {
for (int j = 0; j < 40; j++) {
if (offset >= (TerminalShiftRegister + 960))
offset -= TerminalShiftRegister;
mvwaddch(AppleWindow, i, j, CharacterROM[*offset] );
offset++;
}}
// Set to start of final line, and clear line.
TermY = 23;
TermX = 0;
mvwprintw(AppleWindow, TermY, TermX,
" ");
}
// @ prompt.
mvwaddch(AppleWindow, TermY, TermX, '@' | A_BLINK);
wrefresh(AppleWindow);
}
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