akkartik/mu
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

.

Browse Source
This commit is contained in:
Kartik K. Agaram 2021-03-15 15:04:31 -07:00
parent 2a8f664166
commit 93954f7ccd
1 changed files with 27 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
boot.subx
View File

@ -369,41 +369,41 @@ keyboard-interrupt-handler:
# return
eb/jump $keyboard-interrupt-handler:epilogue/disp8
}
== data
# - 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 $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 1a # jump to $8 [label]
# 2a8:
# $7:
{
81 7/subop/compare *Keyboard-shift-pressed? 0/imm32
74/jump-if-= break/disp8
== data
# al <- *(keyboard shift map + eax)
#? 8a/byte-> *(eax+Keyboard-shift-map) 0/r32/al
8a # copy m8 at rm32 to r8
80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax
00 87 00 00 # disp32 [label]
== code
eb/jump $keyboard-interrupt-handler:select-map-done/disp8
}
# 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:
{
81 7/subop/compare *Keyboard-ctrl-pressed? 0/imm32
74/jump-if-= break/disp8
== data
# al <- *(keyboard ctrl map + eax)
#? 8a/byte-> *(eax+Keyboard-shift-map) 0/r32/al
8a # copy m8 at rm32 to r8
80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax
00 88 00 00 # disp32 [label]
== code
eb/jump $keyboard-interrupt-handler:select-map-done/disp8
}
== data
# otherwise use keyboard normal map
# al <- *(keyboard normal map + eax)
#? 8a/byte-> *(eax+Keyboard-normal-map) 0/r32/al
8a # copy m8 at rm32 to r8
80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax
00 86 00 00 # disp32 [label]
# 2c2:
# $9:
$keyboard-interrupt-handler:select-map-done:
# - if there's no character mapping, return
3c 00 # compare al, 0
74 13 # jump to epilogue if = [label]