From c0c846cc15bbc4a14f705eeb923ed1024f4ee1a0 Mon Sep 17 00:00:00 2001 From: Simponic Date: Mon, 1 Mar 2021 15:17:24 -0700 Subject: Move to GitHub for flexing --- src/port.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 src/port.c (limited to 'src/port.c') diff --git a/src/port.c b/src/port.c new file mode 100644 index 0000000..2a19315 --- /dev/null +++ b/src/port.c @@ -0,0 +1,21 @@ +#include "port.h" + +uint8_t port_byte_in (uint8_t port) { + uint8_t result; + __asm__("in %%dx, %%al" : "=a" (result) : "d" (port)); + return result; +} + +void port_byte_out(uint8_t port, uint8_t data) { + __asm__("out %%al, %%dx" : :"a" (data), "d" (port)); +} + +uint16_t port_word_in (uint16_t port) { + uint16_t result; + __asm__("in %%dx, %%ax" : "=a" (result) : "d" (port)); + return result; +} + +void port_word_out (uint16_t port, uint16_t data) { + __asm__("out %%ax, %%dx" : :"a" (data), "d" (port)); +} -- cgit v1.2.3-70-g09d2