diff options
| -rw-r--r-- | baremetal/ex2.subx | 39 |
1 files changed, 18 insertions, 21 deletions
diff --git a/baremetal/ex2.subx b/baremetal/ex2.subx index 5f007327..591c1e22 100644 --- a/baremetal/ex2.subx +++ b/baremetal/ex2.subx @@ -10,27 +10,24 @@ # Expected output: # html/baremetal.png -# main: (address 0x8800) +main: # (address 0x8800) + # ecx <- start of video memory + 8b/-> *0x7f28 1/r32/ecx -== code + # eax <- final pixel of video memory + 8d/copy-address *(ecx + 0x0bffff) 0/r32/eax # 0xbffff = 1024*768 - 1 -# ecx <- start of video memory -8b/-> *0x7f28 1/r32/ecx + # for each pixel in video memory + { + 39/compare %eax 1/r32/ecx + 7c/jump-if-< break/disp8 + # write its column number to it + 88/byte<- *eax 0/r32/AL + 48/decrement-eax + eb/jump loop/disp8 + } -# eax <- final pixel of video memory -8d/copy-address *(ecx + 0x0bffff) 0/r32/eax # 0xbffff = 1024*768 - 1 - -# for each pixel in video memory -{ - 39/compare %eax 1/r32/ecx - 7c/jump-if-< break/disp8 - # write its column number to it - 88/byte<- *eax 0/r32/AL - 48/decrement-eax - eb/jump loop/disp8 -} - -# hang indefinitely -{ - eb/jump loop/disp8 -} + # hang indefinitely + { + eb/jump loop/disp8 + } |