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first pass translating all of boot.subx 

There's still a few places to clean up surrounded in:
  == data
  ...
  == code
This commit is contained in:
Kartik K. Agaram 2021-03-15 15:09:38 -07:00
parent 93954f7ccd
commit be42a9c3ec
1 changed files with 14 additions and 16 deletions
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30
boot.subx
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@ -403,25 +403,23 @@ keyboard-interrupt-handler:
8a # copy m8 at rm32 to r8
80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax
00 86 00 00 # disp32 [label]
== code
$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]
# 2c6:
# - store al in keyboard buffer
88 # copy r8 to m8 at r32
81 # 10/mod/*+disp32 000/r8/al 001/rm32/ecx
30 80 00 00 # disp32 [label]
# increment index
fe # increment byte
05 # 00/mod/indirect 000/subop/increment 101/rm32/use-disp32
28 80 00 00 # disp32 [label]
# clear top nibble of index (keyboard buffer is circular)
80 # and byte
25 # 00/mod/indirect 100/subop/and 101/rm32/use-disp32
28 80 00 00 # disp32 [label]
0f # imm8
{
3c/compare-al-and 0/imm8
74/jump-if-= break/disp8
# - store al in keyboard buffer
== data
88 # copy r8 to m8 at r32
81 # 10/mod/*+disp32 000/r8/al 001/rm32/ecx
30 80 00 00 # disp32 [label]
== code
# increment index
fe/increment-byte *Keyboard-buffer:write
# clear top nibble of index (keyboard buffer is circular)
80 4/subop/and-byte *Keyboard-buffer:write 0x0f/imm8
}
$keyboard-interrupt-handler:epilogue:
# epilogue
61/pop-all-registers