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PIC: elcr

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copy 2016-01-01 23:16:35 +01:00
parent c3d23da0b9
commit f4fa60b78a
1 changed files with 22 additions and 0 deletions
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22
src/pic.js
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@ -46,6 +46,8 @@ function PIC(cpu, master)
this.read_irr = 1;
this.auto_eoi = 1;
this.elcr = 0;
if(this.is_master)
{
this.slave = new PIC(cpu, this);
@ -159,13 +161,16 @@ function PIC(cpu, master)
};
var io_base;
var iobase_high;
if(this.is_master)
{
io_base = 0x20;
iobase_high = 0x4D0;
}
else
{
io_base = 0xA0;
iobase_high = 0x4D1;
}
cpu.io.register_write(io_base, this, port20_write);
@ -174,6 +179,10 @@ function PIC(cpu, master)
cpu.io.register_write(io_base | 1, this, port21_write);
cpu.io.register_read(io_base | 1, this, port21_read);
cpu.io.register_write(iobase_high, this, port4D0_write);
cpu.io.register_read(iobase_high, this, port4D0_read);
function port20_write(data_byte)
{
//dbg_log("20 write: " + h(data_byte), LOG_PIC);
@ -270,6 +279,19 @@ function PIC(cpu, master)
return ~this.irq_mask & 0xFF;
};
function port4D0_read()
{
dbg_log("elcr read: " + h(this.elcr, 2), LOG_PIC);
return this.elcr;
}
function port4D0_write(value)
{
dbg_log("elcr write: " + h(value, 2), LOG_PIC);
// set by seabios to 00 0C (only set for pci interrupts)
this.elcr = value;
}
if(this.is_master)
{
this.raise_irq = function(irq_number)