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Diffstat (limited to 'src/devices/bus/comx35/thermal.cpp')
-rw-r--r-- | src/devices/bus/comx35/thermal.cpp | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/devices/bus/comx35/thermal.cpp b/src/devices/bus/comx35/thermal.cpp new file mode 100644 index 00000000000..e74b62978d6 --- /dev/null +++ b/src/devices/bus/comx35/thermal.cpp @@ -0,0 +1,127 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + COMX-35 Thermal Printer Card emulation + +**********************************************************************/ + +#include "thermal.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type COMX_THM = &device_creator<comx_thm_device>; + + +//------------------------------------------------- +// ROM( comx_thm ) +//------------------------------------------------- + +ROM_START( comx_thm ) + ROM_REGION( 0x2000, "c000", 0 ) + ROM_LOAD( "thermal.bin", 0x0000, 0x1000, CRC(41a72ba8) SHA1(3a8760c78bd8c7bec2dbf26657b930c9a6814803) ) +ROM_END + + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *comx_thm_device::device_rom_region() const +{ + return ROM_NAME( comx_thm ); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// comx_thm_device - constructor +//------------------------------------------------- + +comx_thm_device::comx_thm_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, COMX_THM, "COMX-35 Thermal Printer Card", tag, owner, clock, "comx_thm", __FILE__), + device_comx_expansion_card_interface(mconfig, *this), + m_rom(*this, "c000") +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void comx_thm_device::device_start() +{ +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void comx_thm_device::device_reset() +{ +} + + +//------------------------------------------------- +// comx_mrd_r - memory read +//------------------------------------------------- + +UINT8 comx_thm_device::comx_mrd_r(address_space &space, offs_t offset, int *extrom) +{ + UINT8 data = 0; + + if (offset >= 0xc000 && offset < 0xd000) + { + data = m_rom->base()[offset & 0xfff]; + } + + return data; +} + + +//------------------------------------------------- +// comx_io_r - I/O read +//------------------------------------------------- + +UINT8 comx_thm_device::comx_io_r(address_space &space, offs_t offset) +{ + /* + INP 2 is used for the printer status, where: + b0=1: Printer Not Ready + b1=1: Energizing Head + b2=1: Head At Position 0 + */ + + return 0; +} + + +//------------------------------------------------- +// comx_io_w - I/O write +//------------------------------------------------- + +void comx_thm_device::comx_io_w(address_space &space, offs_t offset, UINT8 data) +{ + /* + OUT 2 is used to control the thermal printer where: + Q = 0, b0-7: Pixel 1 to 8 + Q = 1, b7: Pixel 9 (if b0-6=#21) + Q = 1, b3=1: Move head right + Q = 1, b0-7=#12: Move head left + */ +} |