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VGA Cursor code is now in vga.cpp.

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This commit is contained in:
Jonas 'Sortie' Termansen 2011-08-22 11:11:50 +02:00
parent 7510708ea1
commit cd78c42c78
3 changed files with 24 additions and 20 deletions
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22
sortix/vga.cpp
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@ -35,6 +35,8 @@ namespace Sortix
namespace VGA namespace VGA
{ {
uint16_t* const vga = (uint16_t* const) 0xB8000; uint16_t* const vga = (uint16_t* const) 0xB8000;
const int width = 80;
const int height = 80;
DevVGAFrame* currentframe; DevVGAFrame* currentframe;
@ -43,6 +45,21 @@ namespace Sortix
currentframe = NULL; currentframe = NULL;
} }
// Changes the position of the hardware cursor.
void SetCursor(nat x, nat y)
{
nat value = x + y * width;
// This sends a command to indicies 14 and 15 in the
// CRT Control Register of the VGA controller. These
// are the high and low bytes of the index that show
// where the hardware cursor is to be 'blinking'.
CPU::OutPortB(0x3D4, 14);
CPU::OutPortB(0x3D5, (value >> 8) & 0xFF);
CPU::OutPortB(0x3D4, 15);
CPU::OutPortB(0x3D5, (value >> 0) & 0xFF);
}
void SysCreateFrame(CPU::InterruptRegisters* R) void SysCreateFrame(CPU::InterruptRegisters* R)
{ {
addr_t page = Page::Get(); addr_t page = Page::Get();
@ -82,7 +99,7 @@ namespace Sortix
frame->physical = page; frame->physical = page;
frame->userframe = userframe; frame->userframe = userframe;
process->_endcodesection = mapto + 0x1000; process->_endcodesection = mapto + 0x1000UL;
R->eax = mapto; R->eax = mapto;
} }
@ -106,7 +123,7 @@ namespace Sortix
// TODO: Check if userframe is actually user-space writable! // TODO: Check if userframe is actually user-space writable!
//Log::PrintF("changeframe: fd = %u, frame = 0x%p, currentframe = 0x%p\n", fd, frame, currentframe); //Log::PrintF("changeframe: fd = %u, frame = 0x%p, currentframe = 0x%p, userframe = 0x%p\n", fd, frame, currentframe, frame->userframe); while(true);
// Check if we need to do anything. // Check if we need to do anything.
if ( frame == currentframe ) { R->eax = 0; return; } if ( frame == currentframe ) { R->eax = 0; return; }
@ -150,6 +167,7 @@ namespace Sortix
frame->onscreen = true; frame->onscreen = true;
currentframe = frame; currentframe = frame;
SetCursor(width, height-1);
} }
void SysDeleteFrame(CPU::InterruptRegisters* R) void SysDeleteFrame(CPU::InterruptRegisters* R)

1
sortix/vga.h
View file

@ -66,6 +66,7 @@ namespace Sortix
}; };
void Init(); void Init();
void SetCursor(nat x, nat y);
// System Calls. // System Calls.
void SysCreateFrame(CPU::InterruptRegisters* R); void SysCreateFrame(CPU::InterruptRegisters* R);

19
sortix/vgaterminal.cpp
View file

@ -49,30 +49,15 @@ namespace Sortix
COMMAND, COMMAND,
} ansimode; } ansimode;
// Changes the position of the hardware cursor.
void SetCursor(nat x, nat y)
{
nat value = x + y * width;
// This sends a command to indicies 14 and 15 in the
// CRT Control Register of the VGA controller. These
// are the high and low bytes of the index that show
// where the hardware cursor is to be 'blinking'.
CPU::OutPortB(0x3D4, 14);
CPU::OutPortB(0x3D5, (value >> 8) & 0xFF);
CPU::OutPortB(0x3D4, 15);
CPU::OutPortB(0x3D5, (value >> 0) & 0xFF);
}
void UpdateCursor() void UpdateCursor()
{ {
if ( showcursor ) if ( showcursor )
{ {
SetCursor(column, line); VGA::SetCursor(column, line);
} }
else else
{ {
SetCursor(width, height-1); VGA::SetCursor(width, height-1);
} }
} }