second stage loader loading semi-works

[bootcensus] / src / boot / boot2.s

diff --git a/src/boot/boot2.s b/src/boot/boot2.s
index 47121ee..7b8c7bb 100644 (file)
--- a/src/boot/boot2.s
+++ b/src/boot/boot2.s
@@ -5,20 +5,44 @@
        mov $0x13, %ax
        int $0x10
 
-       pushw $63
-       pushw $63
-       pushw $0
-       pushw $0xff
-       call set_palette
-       add $8, %sp
+       # copy palette
+       mov $logo_pal, %si
+       xor %cl, %cl
 
+0:     mov $0x3c8, %dx
+       movb %cl, %al
+       outb %al, %dx
+       inc %dx
+       # red
+       movb (%si), %al
+       inc %si
+       shr $2, %al
+       outb %al, %dx
+       # green
+       movb (%si), %al
+       inc %si
+       shr $2, %al
+       outb %al, %dx
+       # blue
+       movb (%si), %al
+       inc %si
+       shr $2, %al
+       outb %al, %dx
+       inc %cl
+       jno 0b
+
+       # copy pixels
        pushw $0xa000
        pop %es
        xor %di, %di
+       mov $logo_pix, %eax
+       shr $4, %eax
+       mov %ax, %ds
+       xor %si, %si
        mov $16000, %ecx
-       mov $0xffffffff, %eax
-       rep stosl
+       rep movsl
 
+       cli
        hlt
 
 set_palette:
@@ -34,3 +58,10 @@ set_palette:
        movw 8(%bp), %ax
        outb %al, %dx
        ret
+
+logo_pal:
+       .incbin "logo.pal"
+
+       .align 16
+logo_pix:
+       .incbin "logo.raw"