From 862271f2eb2dbd8baa4e22a9343943b7c7e50f1d Mon Sep 17 00:00:00 2001 From: Qitian Zeng Date: Fri, 26 Jul 2019 09:38:16 -0500 Subject: [PATCH] fixed errors in stack section --- 04-bootsector-stack/boot_sect_stack.asm | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/04-bootsector-stack/boot_sect_stack.asm b/04-bootsector-stack/boot_sect_stack.asm index 5bff2ab..b1039cc 100644 --- a/04-bootsector-stack/boot_sect_stack.asm +++ b/04-bootsector-stack/boot_sect_stack.asm @@ -9,10 +9,16 @@ push 'C' ; to show how the stack grows downwards mov al, [0x7ffe] ; 0x8000 - 2 -int 0x10 +int 0x10 ; prints A + +mov al, [0x7ffc] ; 0x8000 - 4 +int 0x10 ; prints B + +mov al, [0x7ffa] ; 0x8000 - 6 +int 0x10 ; prints C ; however, don't try to access [0x8000] now, because it won't work -; you can only access the stack top so, at this point, only 0x7ffe (look above) +; 0x8000 is just the base address and doesn't contain anything mov al, [0x8000] int 0x10 @@ -32,10 +38,6 @@ pop bx mov al, bl int 0x10 ; prints A -; data that has been pop'd from the stack is garbage now -mov al, [0x8000] -int 0x10 - jmp $ times 510-($-$$) db 0