Remove an entry from the GDT that is no longer necessary. Add a few comments.

[netwatch.git] / aseg / counter.c

diff --git a/aseg/counter.c b/aseg/counter.c
index 891c07587645a030341d06f01bc49432707414a1..61f9b6fac9e18ffb1a3ac87bd2d54b87925d83b6 100644 (file)
--- a/aseg/counter.c
+++ b/aseg/counter.c
@@ -1,10 +1,61 @@
+#include <io.h>
+

 char counter = 0;
 char counter = 0;

+unsigned long pcisave;
+unsigned char vgasave;
+unsigned char thestr[512];
+
+void memcpy(char *dst, char *src, int c)
+{
+       while (c--)
+               *(dst++) = *(src++);
+}
+
+void strcpy(char *dst, char *src)
+{
+       while (*src)
+               *(dst++) = *(src++);
+}
+
+unsigned char vgaread(unsigned char idx)
+{
+       outb(0x3D4, idx);
+       inb(0x3D5);
+}
+
+void strblit(char *src)
+{
+       char *destp = (char*)(0xB8000 | (vgaread(0xC) << 5) | (vgaread(0xD) << 1));
+       while (*src)
+       {
+               *(destp++) = *(src++);
+               *(destp++) = 0x1F;
+       }
+}

 
 

-#define outb(port, val) \
-({ asm volatile("outb %0, %%dx" : : "a" ((unsigned char)(val)) , "d" ((unsigned short)(port))); })
+void __start (void)
+{
+       unsigned char smramc;
+       
+       pcisave = inl(0xCF8);
+       vgasave = inb(0x3D4);

 
 

-void __start (void) {

        counter++;
        counter++;

-       outb (0x80, counter);
+       outb(0x80, counter);
+       
+       strcpy(thestr, "15-412!");
+       
+       smramc = pci_read8(0, 0, 0, 0x70);
+       pci_write8(0, 0, 0, 0x70, (smramc & 0xF3) | 0x08);
+       strblit(thestr);
+       pci_write8(0, 0, 0, 0x70, smramc);
+       
+       outl(0xCF8, pcisave);
+       outb(0x3D4, vgasave);
+       
+       outb(0x834, 0x40);      // ack the periodic IRQ
+       outb(0x830, (inb(0x830) | 0x2) & ~0x40);
+       outb(0x830, inb(0x830) | 0x40);
+       

 }
 
 }