diff options
| author | Kartik Agaram <vc@akkartik.com> | 2021-01-22 16:52:44 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2021-01-22 16:52:44 -0800 |
| commit | c316a11ffa6fa184c9c62dc6fccbc0a6aa6c8f63 (patch) | |
| tree | 1d4b6fb215639d5d58fc9d598b5fc4ae6983ee17 /baremetal/boot.hex | |
| parent | dbf434f09660263aa989e9fc46789f5aea12618e (diff) | |
| download | mu-c316a11ffa6fa184c9c62dc6fccbc0a6aa6c8f63.tar.gz | |
7539 - baremetal: handle unrecognized keys
Diffstat (limited to 'baremetal/boot.hex')
| -rw-r--r-- | baremetal/boot.hex | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/baremetal/boot.hex b/baremetal/boot.hex index 1fc316c5..c6f8273b 100644 --- a/baremetal/boot.hex +++ b/baremetal/boot.hex @@ -233,7 +233,7 @@ e9 fb ff # loop forever # if (status & 0x1) == 0, return 24 01 # al <- and 0x1 3c 00 # compare al, 0 - 74 35 # jump to epilogue if = [label] + 74 39 # jump to epilogue if = [label] # 120: # if keyboard buffer is full, return 31 c9 # ecx <- xor ecx; 11/direct 001/r32/ecx 001/rm32/ecx @@ -248,7 +248,7 @@ e9 fb ff # loop forever # . if (al != 0) return 3c 00 # compare al, 0 # 130: - 75 23 # jump to epilogue if != [label] + 75 27 # jump to epilogue if != [label] # read keycode into al e4 60 # al <- port 0x60 # if (al & 0x80) a key is being lifted; return @@ -256,17 +256,21 @@ e9 fb ff # loop forever 24 80 # al <- and 0x80 3c 00 # compare al, 0 58 # pop to eax (without touching flags) - 75 19 # jump to epilogue if != [label] + 75 1d # jump to epilogue if != [label] # 13c: # al <- *(keyboard normal map + eax) 8a # copy m8 at rm32 to r8 80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax 00 80 00 00 # disp32 [label] + # if there's no character mapping, return + 3c 00 # compare al, 0 + 74 13 # jump to epilogue if = [label] +# 146: # store al in keyboard buffer 88 # copy r8 to m8 at r32 81 # 10/mod/*+disp32 000/r8/al 001/rm32/ecx d0 7d 00 00 # disp32 [label] -# 148: +# 14c: # increment index fe # increment byte 05 # 00/mod/indirect 000/subop/increment 101/rm32/use-disp32 @@ -276,15 +280,15 @@ e9 fb ff # loop forever 25 # 00/mod/indirect 100/subop/and 101/rm32/use-disp32 c8 7d 00 00 # disp32 [label] 0f # imm8 -# 155: +# 159: # epilogue 61 # pop all registers fb # enable interrupts cf # iret # padding -# 158: - 00 00 00 00 00 00 00 00 +# 15c: + 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |