diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/video/ncurses.c | 42 |
1 files changed, 17 insertions, 25 deletions
diff --git a/src/video/ncurses.c b/src/video/ncurses.c index 242a3e1..8e80580 100644 --- a/src/video/ncurses.c +++ b/src/video/ncurses.c @@ -14,11 +14,11 @@ int TermY = 0; WINDOW *AppleWindow; -const byte* VRAM; +byte* VRAM; -byte* VRAM_Position; +int vPosition = 0; -int VRAM_Offset; +int vOffset = 0; void PrintInfo() @@ -82,8 +82,6 @@ void DisplayInit() // Initialize the terminal shift register variables. VRAM = (byte*)malloc(960); - VRAM_Position = VRAM; - VRAM_Offset = 0; refresh(); } @@ -111,9 +109,9 @@ void DisplayInput(byte n) if (n == CR) { // Add spacing characters into VRAM do { - *VRAM_Position = ' '; - VRAM_Position++; - } while (((int)(VRAM_Position - VRAM) % 40) > 0); + VRAM[vPosition] = ' '; + vPosition++; + } while ((vPosition % 40) > 0); // Set display to next line TermX = 0; @@ -124,8 +122,8 @@ void DisplayInput(byte n) mvwaddch(AppleWindow, TermY, TermX, n & 0x7F); // Add character to VRAM - *VRAM_Position = n & 0x7f; - VRAM_Position++; + VRAM[vPosition] = n & 0x7f; + vPosition++; // Set display to next character/next line TermX++; @@ -136,31 +134,25 @@ void DisplayInput(byte n) } // Reset VRAM_Position if it's value is too great. - if (VRAM_Position >= (VRAM + 960)) - VRAM_Position -= 960; + if (vPosition >= 960) + vPosition -= 960; // If Y is past height.. if (TermY >= 24) { //.. discard the first line.. - VRAM_Offset += 40; - //.. verify the register offset.. - if (VRAM_Offset >= 960) - VRAM_Offset = VRAM; + vOffset += 40; - //.. and create an offset variable to cycle through memory with. - byte *offset = VRAM + VRAM_Offset; - - // Then, for every cell of the screen, fill with the contents of the video memory. + //.. then, for every cell of the screen except the last line, fill with VRAM.. for (int i = 0; i < 23; i++) { for (int j = 0; j < 40; j++) { - if (offset >= (VRAM + 960)) - offset -= 960; - mvwaddch(AppleWindow, i, j, *offset ); - offset++; + mvwaddch(AppleWindow, i, j, VRAM[vOffset++ % 960] ); }} + + // ..and move offset up to next line. + vOffset += 40; - // Set to start of final line, and clear line. + // Visually set to start of final line, and clear line. TermY = 23; TermX = 0; mvwprintw(AppleWindow, TermY, TermX, |