diff options
Diffstat (limited to 'baremetal/boot.hex')
-rw-r--r-- | baremetal/boot.hex | 112 |
1 files changed, 80 insertions, 32 deletions
diff --git a/baremetal/boot.hex b/baremetal/boot.hex index 2419b37f..6a14017d 100644 --- a/baremetal/boot.hex +++ b/baremetal/boot.hex @@ -320,7 +320,7 @@ e9 fd ff # loop forever # check output buffer of 8042 keyboard controller (https://web.archive.org/web/20040604041507/http://panda.cs.ndsu.nodak.edu/~achapwes/PICmicro/keyboard/atkeyboard.html) e4 64 # al <- port 0x64 a8 01 # set zf if bit 0 (least significant) is not set - 74 89 # jump to epilogue if 0 bit is not set [label] + 74 bb # jump to epilogue if 0 bit is not set [label] # 21e: # - if keyboard buffer is full, return 31 c9 # ecx <- xor ecx; 11/direct 001/r32/ecx 001/rm32/ecx @@ -334,7 +334,7 @@ e9 fd ff # loop forever 30 80 00 00 # disp32 [label] # if (al != 0) return 3c 00 # compare al, 0 - 75 77 # jump to epilogue if != [label] + 75 a9 # jump to epilogue if != [label] # 230: # - read keycode e4 60 # al <- port 0x60 @@ -357,61 +357,97 @@ e9 fd ff # loop forever 05 # 00/mod/indirect 000/subop/copy 101/rm32/use-disp32 10 80 00 00 # disp32 [label] 00 00 00 00 # imm32 +# 24e: # $2: + # if (al == 0x9d) ctrl = false # ctrl is being lifted + 3c 9d # compare al, 0x9d + 75 0a # jump to $3 if != [label] + # *ctrl = 0 + c7 # copy imm32 to rm32 + 05 # 00/mod/indirect 000/subop/copy 101/rm32/use-disp32 + 14 80 00 00 # disp32 [label] + 00 00 00 00 # imm32 +# 25c: +# $3: # if (al & 0x80) a key is being lifted; return 50 # push eax 24 80 # al <- and 0x80 3c 00 # compare al, 0 58 # pop to eax (without touching flags) - 75 51 # jump to epilogue if != [label] -# 256: + 75 75 # jump to epilogue if != [label] +# 264: # - key pressed # if (al == 0x2a) shift = true, return # left shift pressed 3c 2a # compare al, 0x2a - 75 0c # jump to $3 if != [label] + 75 0c # jump to $4 if != [label] # *shift = 1 c7 # copy imm32 to rm32 05 # 00/mod/indirect 000/subop/copy 101/rm32/use-disp32 10 80 00 00 # disp32 [label] 01 00 00 00 # imm32 - eb 41 # jump to epilogue [label] -# 266: -# $3: + eb 65 # jump to epilogue [label] +# 274: +# $4: # if (al == 0x36) shift = true, return # right shift pressed 3c 36 # compare al, 0x36 - 75 0c # jump to $4 if != [label] + 75 0c # jump to $5 if != [label] # *shift = 1 c7 # copy imm32 to rm32 05 # 00/mod/indirect 000/subop/copy 101/rm32/use-disp32 10 80 00 00 # disp32 [label] 01 00 00 00 # imm32 - eb 31 # jump to epilogue [label] -# 276: -# $4: + eb 55 # jump to epilogue [label] +# 284: +# $5: + # if (al == 0x1d) ctrl = true, return + 3c 1d # compare al, 0x36 + 75 0c # jump to $6 if != [label] + # *shift = 1 + c7 # copy imm32 to rm32 + 05 # 00/mod/indirect 000/subop/copy 101/rm32/use-disp32 + 14 80 00 00 # disp32 [label] + 01 00 00 00 # imm32 + eb 45 # jump to epilogue [label] +# 294: +# $6: # - convert key to character # if (shift) use keyboard shift map 81 # operate on rm32 and imm32 3d # 00/mod/indirect 111/subop/compare 101/rm32/use-disp32 10 80 00 00 # disp32 = shift [label] 00 00 00 00 # imm32 - 74 08 # jump to $5 if = [label] + 74 08 # jump to $7 if = [label] # al <- *(keyboard shift map + eax) 8a # copy m8 at rm32 to r8 80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax 00 87 00 00 # disp32 [label] - eb 06 # jump to $6 [label] -# 28a: -# $5: + eb 1a # jump to $8 [label] +# 2a8: +# $7: + # if (ctrl) use keyboard ctrl map + 81 # operate on rm32 and imm32 + 3d # 00/mod/indirect 111/subop/compare 101/rm32/use-disp32 + 14 80 00 00 # disp32 = ctrl [label] + 00 00 00 00 # imm32 + 74 08 # jump to $8 if = [label] + # al <- *(keyboard ctrl map + eax) + 8a # copy m8 at rm32 to r8 + 80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax + 00 88 00 00 # disp32 [label] + eb 06 # jump to $9 [label] +# 2bc: +# $8: # otherwise use keyboard normal map # al <- *(keyboard normal map + eax) 8a # copy m8 at rm32 to r8 80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax 00 86 00 00 # disp32 [label] -# $6: +# 2c2: +# $9: # - if there's no character mapping, return 3c 00 # compare al, 0 74 13 # jump to epilogue if = [label] -# 294: +# 2c6: # - store al in keyboard buffer 88 # copy r8 to m8 at r32 81 # 10/mod/*+disp32 000/r8/al 001/rm32/ecx @@ -425,18 +461,15 @@ e9 fd ff # loop forever 25 # 00/mod/indirect 100/subop/and 101/rm32/use-disp32 28 80 00 00 # disp32 [label] 0f # imm8 -# 2a7: +# 2d9: # epilogue 61 # pop all registers fb # enable interrupts cf # iret # padding -# 2aa: - 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 00 00 +# 2dc: + 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 # 300: @@ -470,9 +503,13 @@ e9 fd ff # loop forever # var shift: boolean 00 00 00 00 -# padding # 414: - 00 00 00 00 00 00 00 00 00 00 00 00 +# var ctrl: boolean + 00 00 00 00 + +# padding +# 418: + 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 # 428: @@ -735,7 +772,7 @@ e9 fd ff # loop forever # tab q w e r t y u i o p [ ] 09 71 77 65 72 74 79 75 69 6f 70 5b 5d # 1c -# enter +# enter (newline) 0a 00 # 1e # a s d f g h j k l ; ' ` \ @@ -774,9 +811,9 @@ e9 fd ff # loop forever 21 40 23 24 25 53 26 2a 28 29 5f 2b 08 # 0f # tab Q W E R T Y U I O P { } - 09 51 57 55 52 54 59 55 59 5f 50 7b 7d + 09 51 57 45 52 54 59 55 49 5f 50 7b 7d # 1c -# enter +# enter (newline) 0a 00 # 1e # A S D F G H J K L : " ~ | @@ -807,9 +844,20 @@ e9 fd ff # loop forever # c00: # keyboard ctrl map: 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 00 00 00 00 00 00 00 00 00 00 00 00 +# 10 +# ^q ^w ^e ^r ^t ^y ^u tb ^o ^p + 11 17 05 12 14 19 15 09 1f 10 00 00 +# 1c +# carriage-return + 0d 00 +# 1e +# ^a ^s ^d ^f ^g ^h ^j ^j ^l ^\ + 01 13 04 06 07 08 0a 0b 0c 00 00 00 00 1c +# 2c +# ^z ^x ^c ^v ^b ^n ^m ^/ + 1a 18 03 16 02 0e 0d 00 00 1f 00 00 +# 38 + 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 00 00 00 00 |