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author | 2013-10-20 19:43:30 +0000 | |
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committer | 2013-10-20 19:43:30 +0000 | |
commit | 726983263b929a6f1f0a131d7b511242b8bf0437 (patch) | |
tree | d0c91051c8cd9792ed3046180f893edfdefc38f9 /src/emu/bus/comx35/eprom.c | |
parent | d2236708b3ca7fc0472e9e4915e0ba4dd01c4089 (diff) |
(MESS) comx35: Moved expansion port under emu/bus. (nw)
Diffstat (limited to 'src/emu/bus/comx35/eprom.c')
-rw-r--r-- | src/emu/bus/comx35/eprom.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/emu/bus/comx35/eprom.c b/src/emu/bus/comx35/eprom.c new file mode 100644 index 00000000000..1ef8305f78d --- /dev/null +++ b/src/emu/bus/comx35/eprom.c @@ -0,0 +1,124 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + COMX-35 F&M EPROM Card emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#include "eprom.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type COMX_EPR = &device_creator<comx_epr_device>; + + +//------------------------------------------------- +// ROM( comx_epr ) +//------------------------------------------------- + +ROM_START( comx_epr ) + ROM_REGION( 0x800, "f800", 0 ) + ROM_LOAD( "f&m.eprom.board.1.1.bin", 0x0000, 0x0800, CRC(a042a31a) SHA1(13831a1350aa62a87988bfcc99c4b7db8ef1cf62) ) + + ROM_REGION( 0x10000, "eprom", 0 ) + ROM_LOAD( "f&m.basic.bin", 0x0000, 0x2000, CRC(22ab7b61) SHA1(68b5770bca37b1ba94083f944086884e612b5a1b) ) + ROM_LOAD( "disk.utilities.bin", 0x2000, 0x2000, CRC(2576c945) SHA1(e80481054c6997a5f418d8a5872ac0110ae7b75a) ) + ROM_LOAD( "tennismania.bin", 0x4000, 0x2000, CRC(a956cc74) SHA1(8bc914f52f0dd2cf792da74ec4e9e333365619ef) ) +ROM_END + + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *comx_epr_device::device_rom_region() const +{ + return ROM_NAME( comx_epr ); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// comx_epr_device - constructor +//------------------------------------------------- + +comx_epr_device::comx_epr_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, COMX_EPR, "COMX-35 F&M EPROM Switchboard", tag, owner, clock, "comx_epr", __FILE__), + device_comx_expansion_card_interface(mconfig, *this), + m_rom(*this, "f800"), + m_eprom(*this, "eprom"), + m_select(0) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void comx_epr_device::device_start() +{ + // state saving + save_item(NAME(m_select)); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void comx_epr_device::device_reset() +{ +} + + +//------------------------------------------------- +// comx_mrd_r - memory read +//------------------------------------------------- + +UINT8 comx_epr_device::comx_mrd_r(address_space &space, offs_t offset, int *extrom) +{ + UINT8 data = 0; + + if (offset >= 0xc000 && offset < 0xe000) + { + offs_t address = (m_select << 13) | (offset & 0x1fff); + data = m_eprom->base()[address]; + } + else if (offset >= 0xf800) + { + data = m_rom->base()[offset & 0x7ff]; + } + + return data; +} + + +//------------------------------------------------- +// comx_io_w - I/O write +//------------------------------------------------- + +void comx_epr_device::comx_io_w(address_space &space, offs_t offset, UINT8 data) +{ + if (offset == 1) + { + m_select = data >> 5; + } +} |