diff options
Diffstat (limited to 'src/devices/bus/isa/pds.c')
-rw-r--r-- | src/devices/bus/isa/pds.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/devices/bus/isa/pds.c b/src/devices/bus/isa/pds.c new file mode 100644 index 00000000000..235e0acdd02 --- /dev/null +++ b/src/devices/bus/isa/pds.c @@ -0,0 +1,65 @@ +// 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 "pds.h" + +const device_type ISA8_PDS = &device_creator<isa8_pds_device>; + +isa8_pds_device::isa8_pds_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, ISA8_PDS, "Programmers Development System", tag, owner, clock, "isa_pds", __FILE__), + 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(space,offset/2); + return 0xff; +} + +WRITE8_MEMBER(isa8_pds_device::ppi_w) +{ + if(!(offset & 0x01)) + m_ppi->write(space,offset/2,data); +} + +void isa8_pds_device::device_start() +{ + set_isa_device(); + m_isa->install_device(0x0300, 0x0307, 0, 0, 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() +{ +} + +static MACHINE_CONFIG_FRAGMENT( pds_config ) + MCFG_DEVICE_ADD("pds_ppi", I8255, 0) +MACHINE_CONFIG_END + +machine_config_constructor isa8_pds_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( pds_config ); +} |