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// license:BSD-3-Clause
// copyright-holders:Barry Rodewald
/*
* isa_pds.c - Programmers Development System 8-bit ISA card
*
* Used to connect up to two 8-bit systems to the PC, allowing the download of assembled code directly to the
* target 8-bit system (Spectrum, CPC, MSX, C64 and maybe the BBC?)
*
* The editor software requires the ISA card to be present.
*
* The PC end hardware consists of an 8-bit ISA card containing an 8255 PPI hooked up to the two connectors on the
* back of the card.
*
* The 8-bit end hardware consists of an expansion device containing a Z80PIO.
*
* Created on: 31/01/2014
*/
#include "emu.h"
#include "pds.h"
DEFINE_DEVICE_TYPE(ISA8_PDS, isa8_pds_device, "isa_pds", "Programmers Development System (host)")
isa8_pds_device::isa8_pds_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: device_t(mconfig, ISA8_PDS, tag, owner, clock)
, device_isa8_card_interface(mconfig, *this)
, m_ppi(*this,"pds_ppi")
{
}
uint8_t isa8_pds_device::ppi_r(offs_t offset)
{
if(!(offset & 0x01))
return m_ppi->read(offset/2);
return 0xff;
}
void isa8_pds_device::ppi_w(offs_t offset, uint8_t data)
{
if(!(offset & 0x01))
m_ppi->write(offset/2,data);
}
void isa8_pds_device::device_start()
{
set_isa_device();
m_isa->install_device(0x0300, 0x0307, read8sm_delegate(*this, FUNC(isa8_pds_device::ppi_r)), write8sm_delegate(*this, FUNC(isa8_pds_device::ppi_w)));
}
void isa8_pds_device::device_reset()
{
}
void isa8_pds_device::device_stop()
{
}
void isa8_pds_device::device_add_mconfig(machine_config &config)
{
I8255(config, m_ppi);
}
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