CTAOS v3

SysCore/hal/cmos/cmos.c

@@ -0,0 +1,92 @@
+#include <system.h>
+#include <time.h>
+#include "cmos.h"
+
+volatile byte i86_cmos_data[128];
+
+void i86_cmos_write ()
+{
+      byte i;
+      for (i = 0; i < 128; i++) {
+            //asm volatile ("cli");
+            outportb(0x70, i);
+            iowait();
+            outportb(0x71, i86_cmos_data[i]);
+            //asm volatile ("sti");
+            }
+}
+
+void i86_cmos_read ()
+{
+      byte i;
+      for (i = 0; i < 128; i++) {
+            //asm volatile ("cli");
+            outportb(0x70, i);
+            iowait();
+            i86_cmos_data[i] = inportb(0x71);
+            //asm volatile ("sti");
+            }
+}
+
+void i86_cmos_read_clock(TIME* tim)
+{
+      i86_cmos_read();
+      
+      if ((i86_cmos_data[0x0b]&4)==0) // BCD = true;
+      {
+            tim->seconds = (i86_cmos_data[0x00]%16) + 10*(i86_cmos_data[0x00]/16);
+            tim->minutes = (i86_cmos_data[0x02]%16) + 10*(i86_cmos_data[0x02]/16);
+            if ((i86_cmos_data[0x0b]&2)==0) { // AM/PM
+                        if (i86_cmos_data[0x04]&80) { // pm
+                          tim->hours = ((i86_cmos_data[0x04]-0x80)%16) + 10*((i86_cmos_data[0x04]-0x80)/16);
+                          tim->am_pm = 1;
+                        }
+                        else { // am
+                          tim->hours = (i86_cmos_data[0x04]%16) + 10*(i86_cmos_data[0x04]/16);
+                          tim->am_pm = 0;
+                        }
+            }
+            else { // 24 hours
+                          tim->hours = (i86_cmos_data[0x04]%16) + 10*(i86_cmos_data[0x04]/16);
+                          if (tim->hours > 12) {
+                              tim->am_pm = 1;
+                              tim->hours -= 12;
+                          }
+                          else tim->am_pm = 0;
+            }
+
+            tim->weekday = (i86_cmos_data[0x06]%16) + 10*(i86_cmos_data[0x06]/16);
+            tim->day = (i86_cmos_data[0x07]%16) + 10*(i86_cmos_data[0x07]/16);
+            tim->month = (i86_cmos_data[0x08]%16) + 10*(i86_cmos_data[0x08]/16);
+            tim->year = (i86_cmos_data[0x09]%16) + 10*(i86_cmos_data[0x09]/16);
+            tim->century = (i86_cmos_data[0x32]%16) + 10*(i86_cmos_data[0x32]/16);
+      }
+            
+      else {//BCD = false;
+            tim->seconds = i86_cmos_data[0x00];
+            tim->minutes = i86_cmos_data[0x02];
+            if ((i86_cmos_data[0x0b]&2)==0) { // AM/PM
+                        if (i86_cmos_data[0x04]&80) { // pm
+                          tim->hours = i86_cmos_data[0x04]-0x80;
+                          tim->am_pm = 1;
+                        }
+                        else { // am
+                          tim->hours = i86_cmos_data[0x04];
+                          tim->am_pm = 0;
+                        }
+            }
+            else { // 24 hours
+                          tim->hours = i86_cmos_data[0x02];
+                          if (tim->hours > 12) {
+                              tim->am_pm = 1;
+                              tim->hours -= 12;
+                          }
+                          else tim->am_pm = 0;
+            }
+            tim->weekday = i86_cmos_data[0x06];
+            tim->day = i86_cmos_data[0x07];
+            tim->month = i86_cmos_data[0x08];
+            tim->year = i86_cmos_data[0x09];
+            tim->century = i86_cmos_data[0x32];
+      }
+}

SysCore/hal/cmos/cmos.h

@@ -0,0 +1,10 @@
+#ifndef __CMOS_H
+#define __CMOS_H
+
+extern volatile byte i86_cmos_data[128];
+
+extern void i86_cmos_write ();
+extern void i86_cmos_read ();
+extern void i86_cmos_read_clock (TIME *tim);
+
+#endif

SysCore/hal/cmos/compile.bat

@@ -0,0 +1,18 @@
+@echo off
+rem The name of the loader assembly file (without extension, must be .asm):
+set loader_name=loader
+
+rem NASM and DJGPP executable paths:
+set nasm_path=C:\nasm
+set djgpp_path=C:\DJGPP\bin
+set objpath=../../objects
+set incpath=../../include
+
+@echo on
+%djgpp_path%\gcc.exe -Wall -O -fstrength-reduce -fomit-frame-pointer -nostdinc -fno-builtin -I%incpath% -c -o %objpath%/cmos.o cmos.c 
+
+@echo off
+@echo .
+@echo Done!
+
+@pause