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This commit is contained in:
Kartik K. Agaram 2021-06-29 21:58:46 -07:00
parent cd411f0901
commit d418bc0c97
1 changed files with 5 additions and 5 deletions
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10
timer.subx
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@ -351,10 +351,10 @@ timer-interrupt-handler:
b0/copy-to-al 0x20/imm8
e6/write-al-into-port 0x20/imm8
31/xor %eax 0/r32/eax
# ecx = *Current-color
8b/-> *Current-color 1/r32/ecx
# increment *Current-color
81 0/subop/add *Current-color 0x01010101/imm32
# ecx = *Timer-current-color
8b/-> *Timer-current-color 1/r32/ecx
# update *Timer-current-color
81 0/subop/add *Timer-current-color 0x01010101/imm32
# eax = *Video-memory + 0x1200 (a few rows down from top, around middle of screen)
8b/-> *Video-memory-addr 0/r32/eax
05/add-to-eax 0x1200/imm32
@ -432,7 +432,7 @@ Video-memory-addr:
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
# }}}
Current-color:
Timer-current-color:
0/imm32
# vim:ft=subx