diff options
Diffstat (limited to 'src/serial.c')
| -rw-r--r-- | src/serial.c | 49 |
1 files changed, 10 insertions, 39 deletions
diff --git a/src/serial.c b/src/serial.c index 026c399..f9988a3 100644 --- a/src/serial.c +++ b/src/serial.c @@ -76,10 +76,15 @@ handle_1400(struct bregs *regs) set_success(regs); } -static int -write_serial(u16 addr, u16 timeout, char c) +// SERIAL - WRITE CHARACTER TO PORT +static void +handle_1401(struct bregs *regs) { + u16 addr = getComAddr(regs); + if (!addr) + return; u16 timer = GET_BDA(timer_counter); + u16 timeout = GET_BDA(com_timeout[regs->dx]); while (((inb(addr+5) & 0x60) != 0x60) && (timeout)) { u16 val16 = GET_BDA(timer_counter); if (val16 != timer) { @@ -87,24 +92,10 @@ write_serial(u16 addr, u16 timeout, char c) timeout--; } } - if (!timeout) - // Ran out of time. - return -1; - outb(c, addr); - return 0; -} - -// SERIAL - WRITE CHARACTER TO PORT -static void -handle_1401(struct bregs *regs) -{ - u16 addr = getComAddr(regs); - if (!addr) - return; - u16 timeout = GET_BDA(com_timeout[regs->dx]); - int ret = write_serial(addr, timeout, regs->al); + if (timeout) + outb(regs->al, addr); regs->ah = inb(addr+5); - if (ret) + if (!timeout) regs->ah |= 0x80; set_success(regs); } @@ -172,26 +163,6 @@ handle_14(struct bregs *regs) /**************************************************************** - * Serial debugging - ****************************************************************/ - -#define BX_DEBUG_PORT 0x03f8 - -void -debug_serial_setup() -{ - /* setup for serial logging: 8N1 */ - outb(0x03, BX_DEBUG_PORT+3); -} - -void -debug_serial(char c) -{ - write_serial(BX_DEBUG_PORT, 0x0a, c); -} - - -/**************************************************************** * LPT ports ****************************************************************/ |