diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/toxic/io.h | 9 | ||||
| -rw-r--r-- | src/io/io.asm | 56 |
2 files changed, 65 insertions, 0 deletions
diff --git a/src/include/toxic/io.h b/src/include/toxic/io.h new file mode 100644 index 0000000..f2a869a --- /dev/null +++ b/src/include/toxic/io.h @@ -0,0 +1,9 @@ +#ifndef IO_H +#define IO_H + +unsigned char insb(unsigned short port); +unsigned short insw(unsigned short port); + +void outb(unsigned short port, unsigned char val); +void outw(unsigned short port, unsigned short val); +#endif /* IO_H */ diff --git a/src/io/io.asm b/src/io/io.asm new file mode 100644 index 0000000..37ad7eb --- /dev/null +++ b/src/io/io.asm @@ -0,0 +1,56 @@ +section .asm + +global insb +global insw +global outb +global outw + +insb: + push ebp + mov ebp, esp + + xor eax, eax ; Zero out eax + mov dx, [ebp+8] + in al, dx + + mov esp, ebp + pop ebp + ret + +insw: + push ebp + mov ebp, esp + + xor eax, eax ; Zero out eax + mov dx, [ebp+8] + in ax, dx + + mov esp, ebp + pop ebp + ret + +outb: + push ebp + mov ebp, esp + + xor eax, eax + mov ax, [ebp+12] ; val to write + mov dx, [ebp+8] ; to this port + out dx, al + + mov esp, ebp + pop ebp + ret + +outw: + push ebp + mov ebp, esp + + xor eax, eax + mov ax, [ebp+12] ; val to write + mov dx, [ebp+8] ; to this port + out dx, ax + + mov esp, ebp + pop ebp + ret |