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// license:BSD-3-Clause
// copyright-holders:Barry Rodewald
/*
VIA VT82C505 ISA/VL PCI bridge
*/
#include "emu.h"
#include "vt82c505.h"
/***************************************************************************
IMPLEMENTATION
***************************************************************************/
DEFINE_DEVICE_TYPE(VT82C505, vt82c505_device, "vt82c505_device", "VIA VT82C505 PCI bridge")
vt82c505_device::vt82c505_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: device_t(mconfig, VT82C505, tag, owner, clock)
, pci_device_interface(mconfig, *this)
{
}
uint32_t vt82c505_device::pci_read(pci_bus_device *pcibus, int function, int offset, uint32_t mem_mask)
{
uint32_t result = 0;
if (function != 0)
return result;
switch (offset)
{
case 0x00: // vendor/device ID
result = 0x05051106;
break;
case 0x04: // command / status
result = 0x00000007;
break;
case 0x80: // DIP switch / revision, memory size, buffer control, VLB interface timing
result = 0x00000100;
break;
}
logerror("%s: PCI read func %i, offset %02x, result %08x\n",tag(),function,offset,result);
return result;
}
void vt82c505_device::pci_write(pci_bus_device *pcibus, int function, int offset, uint32_t data, uint32_t mem_mask)
{
if (function != 0)
return;
switch(offset)
{
case 0x84:
if(ACCESSING_BITS_0_7) // RX87: memory window 1 A31:24
{
m_window_addr[0] = (m_window_addr[0] & 0xff00) | (data & 0x000000ff);
logerror("%s: memory window #1 A31:24 set: %04x\n",tag(),m_window_addr[0]);
}
break;
case 0x88:
if(ACCESSING_BITS_24_31) // RX88: memory window 1 A23:16
{
m_window_addr[0] = (m_window_addr[0] & 0x00ff) | ((data & 0xff000000) >> 24);
logerror("%s: memory window #1 A23:16 set: %04x\n",tag(),m_window_addr[0]);
}
if(ACCESSING_BITS_16_23) // RX89: memory window 1 attributes
{
m_window_attr[0] = ((data & 0x00ff0000) >> 16);
logerror("%s: memory window #1 attributes set: %02x\n",tag(),m_window_attr[0]);
}
break;
}
logerror("%s: PCI write func %i, offset %02x, data %08x\n",tag(),function,offset,data);
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void vt82c505_device::device_start()
{
/* setup save states */
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void vt82c505_device::device_reset()
{
}
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