// 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 require 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, uint32_t clock) : device_t(mconfig, ISA8_PDS, tag, owner, clock) , device_isa8_card_interface(mconfig, *this) , m_ppi(*this,"pds_ppi") { } READ8_MEMBER(isa8_pds_device::ppi_r) { if(!(offset & 0x01)) return m_ppi->read(offset/2); return 0xff; } WRITE8_MEMBER(isa8_pds_device::ppi_w) { if(!(offset & 0x01)) m_ppi->write(offset/2,data); } void isa8_pds_device::device_start() { set_isa_device(); m_isa->install_device(0x0300, 0x0307, read8_delegate(FUNC(isa8_pds_device::ppi_r),this), write8_delegate(FUNC(isa8_pds_device::ppi_w),this) ); } 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); }