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Made VGA memory bounds setting more obvious as to why it has its value.

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This commit is contained in:
neviyn 2017-10-22 02:00:07 +01:00
parent 5982c72a8a
commit 47f18157b3
1 changed files with 5 additions and 3 deletions
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8
kernel/arch/i386/tty.nim
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@ -1,11 +1,13 @@
import vga import vga
type
VGAMemory = ptr array[0..1999, VGADoubleByte]
const const
vgaWidth = 80 vgaWidth = 80
vgaHeight = 25 vgaHeight = 25
type
VGAMemory = ptr array[0..(vgaWidth * vgaHeight - 1), VGADoubleByte]
const
terminalBufferBaseAddress = 0xB8000 terminalBufferBaseAddress = 0xB8000
vgaMem = cast[VGAMemory](terminalBufferBaseAddress) vgaMem = cast[VGAMemory](terminalBufferBaseAddress)