bedohswe/bootsector_tictactoe
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Some changes.

Browse Source
This commit is contained in:
bʰedoh₂ swé 2025-05-25 17:49:39 +05:00
parent e1e670abdf
commit 60516831b9
1 changed files with 20 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
boot.c
View File

@ -2,20 +2,22 @@
#include <stdbool.h>
#include "hedley.h"
typedef enum : char {
typedef unsigned char uchar;
typedef enum : uchar {
NONE = ' ',
CROSS = 'X',
NOT = 'O'
} Cell;
Cell* const board = (Cell*)0x7F00;
static Cell* const board = (Cell*)0x7F00;
HEDLEY_ALWAYS_INLINE char readchar(void);
HEDLEY_ALWAYS_INLINE bool checkwin(Cell c);
HEDLEY_NEVER_INLINE void putchar(char);
HEDLEY_NEVER_INLINE void printboard(void);
static uchar readchar(void);
static bool checkwin(Cell c);
static void putchar(uchar);
static void printboard(void);
char numpadkeys[];
static uchar numpadkeys[11];
void _start(void) {
__asm__ volatile (
@ -24,12 +26,12 @@ void _start(void) {
"start:\n"
);
Cell cur = CROSS;
for (unsigned char i = 0; i < 9; i++)
for (uchar i = 0; i < 9; i++)
board[i] = NONE;
while (1) {
printboard();
char k = readchar();
char o;
uchar k = readchar();
uchar o;
if (k > 0x46)
o = 0x47;
else if (k < 0x13)
@ -38,7 +40,7 @@ void _start(void) {
o = (0x1E - 4);
else
o = (0x2C - 8);
size_t c = numpadkeys[k - o];
uchar c = numpadkeys[k - o];
if (board[c] != NONE)
continue;
board[c] = cur;
@ -53,11 +55,10 @@ void _start(void) {
HEDLEY_UNREACHABLE();
}
// numpadkeys[x - 0x47]
char numpadkeys[] = {0, 1, 2, false, 3, 4, 5, false, 6, 7, 8};
static uchar numpadkeys[11] = {0, 1, 2, false, 3, 4, 5, false, 6, 7, 8};
HEDLEY_NEVER_INLINE
void printboard(void) {
static void printboard(void) {
__asm__ volatile (
"movb $0x02, %%ah;"
"movb $0x00, %%bh;"
@ -67,8 +68,8 @@ void printboard(void) {
:
:"%ah","%bh","%dx"
);
for (char i = 0; i < 3; i++) {
for (char j = 0; j < 3; j++) {
for (uchar i = 0; i < 3; i++) {
for (uchar j = 0; j < 3; j++) {
putchar(board[i * 3 + j]);
}
putchar('\n');
@ -76,8 +77,7 @@ void printboard(void) {
}
}
HEDLEY_ALWAYS_INLINE
bool checkwin(Cell c) {
static bool checkwin(Cell c) {
for (size_t i = 0; i <= 2; i++)
if (((board[i] == c) && (board[i + 3] == c) && (board[i + 6] == c)) &&
((board[3*i] == c) && (board[3*i + 1] == c) && (board[3*i + 2] == c)))
@ -94,8 +94,7 @@ bool checkwin(Cell c) {
* 678
*/
HEDLEY_ALWAYS_INLINE
char readchar(void) {
static uchar readchar(void) {
char out;
__asm__ volatile (
"movb $0x00, %%ah;"
@ -108,8 +107,7 @@ __asm__ volatile (
return out;
}
HEDLEY_NEVER_INLINE
void putchar(char out) {
static void putchar(uchar out) {
__asm__ volatile (
"movb $0x0e, %%ah;"
"movb %0, %%al;"