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Add 68000 support

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This commit is contained in:
Laurent Vivier 2005-05-17 23:40:19 +00:00
parent 6cebabe53b
commit a9f3d5b2e5
2 changed files with 31 additions and 7 deletions
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6
second/bootinfo.c
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@ -134,7 +134,7 @@ void bootinfo_init(char* command_line,
} else {
Gestalt('ram ', &ram);
}
boot_info.bi_mac.memsize = ram / (1024L * 1024L);
boot_info.bi_mac.memsize = ram >> 20; /* in mega-bytes */
/* set processor type */
@ -223,7 +223,11 @@ void bootinfo_init(char* command_line,
gmt_bias = where.u.gmtDelta & 0x00FFFFFF;
if (gmt_bias & 0x00800000)
gmt_bias |= 0xFF000000; /* sign-extend to 32 bits */
#if defined(68000_SUPPORT)
asm("divs #60, %1" : "=d" (gmt_bias) : "0" (gmt_bias));
#else
gmt_bias = (long)gmt_bias / 60; /* convert to whole minutes, remember sign */
#endif
boot_info.bi_mac.gmtbias = gmt_bias;

32
second/vga.c
View File

@ -223,10 +223,26 @@ draw_byte(unsigned char c, unsigned long locX, unsigned long locY)
{
unsigned char *base;
unsigned char *glyph;
unsigned long x_base;
unsigned long y_base;
glyph = font_get(c);
base = vga.base + vga.row_bytes * locY * 16 + locX * vga.depth;
#if defined(68000_SUPPORT)
/* NOTE: row_bytes can be a short */
y_base = locY;
asm("mulu %0, %1" : : "g" (vga.row_bytes) , "r" (y_base) );
y_base <<= 4;
x_base = locX;
asm("mulu %0, %1" : : "g" (vga.depth) , "r" (x_base) );
#else
y_base = vga.row_bytes * locY * 16;
x_base = locX * vga.depth;
#endif
base = vga.base + y_base + x_base;
switch(vga.depth)
{
@ -257,17 +273,19 @@ static void
vga_scroll()
{
unsigned long j;
unsigned long i;
unsigned long *src;
unsigned long *dst;
unsigned long bg32;
/* move up the screen */
src = (unsigned long *)(vga.base + vga.row_bytes * 16);
src = (unsigned long *)(vga.base + (vga.row_bytes << 4));
dst = (unsigned long *)vga.base;
for (j = 0; j < ((vga.siz_h-1)*vga.row_bytes<<2); j++)
*dst++ = *src++;
for (j = 0; j < vga.siz_h - 1; j++)
for (i = 0; i < (vga.row_bytes<<2); i++)
*dst++ = *src++;
/* clear last line */
@ -325,6 +343,7 @@ static void
vga_clear()
{
int i,j;
unsigned char row;
unsigned char bg;
unsigned long bg32;
unsigned long *base;
@ -341,9 +360,10 @@ vga_clear()
bg32 = 0x00000000;
}
for (j = 0; j < vga.height; j++)
for (j = 0, row = 0; j < vga.height; j++)
{
base = (unsigned long*)(vga.base + vga.row_bytes * j);
base = (unsigned long*)(vga.base + row);
row += vga.row_bytes;
for (i = 0; i < (vga.row_bytes >> 2); i++)
*base++ = bg32;