back to single-buffer to save space. modern machines are fast enough to

draw everything in vblank

diff --git a/bootcard.asm b/bootcard.asm
index ed23d79..ddf50cd 100644 (file)
--- a/bootcard.asm
+++ b/bootcard.asm
@@ -52,24 +52,19 @@ start:      xor ax, ax
 
        mov ax, 13h
        int 10h
-       push 1000h
+       push 0a000h
        pop es
 
+       setcur 10, 0
+       mov si, str1
+       call textout
+       setcur 12, 1
+       mov si, str2
+       call textout
+
        sti
 
 mainloop:
-       call drawbg
-
-       push ds
-       push es
-       push es
-       pop ds
-       push 0a000h
-       pop es
-       xor di, di
-       xor si, si
-       mov cx, 32000
-
        mov dx, 3dah
 .invb: in al, dx
        and al, 8
@@ -78,16 +73,7 @@ mainloop:
        and al, 8
        jz .novb
 
-       rep movsw
-       pop es
-       pop ds
-
-       setcur 10, 0
-       mov si, str1
-       call textout
-       setcur 12, 1
-       mov si, str2
-       call textout
+       call drawbg
 
        jmp mainloop