mirror of
https://github.com/holub/mame
synced 2025-06-04 20:06:28 +03:00
08b42aabaa
(MESS) vic20: Added floating bus read support to VIC and cartridge interface. (MESS) vic10: Added floating bus read support to VIC-II and cartridge interface. (MESS) c64: Added floating bus read support to cartridge interface. [Curt Coder] (MESS) plus4: Added floating bus read support to TED and cartridge interface. Implemented some Diag264 test cartridge loopback connectors. [Curt Coder] (MESS) c16: Added PAL/NTSC variants. (nw) (MESS) v364: Fixed speech ROM mapping. (nw) (MESS) compis: Separated keyboard to its own file. (nw) (MESS) huebler: Cleanup. (nw)
115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/**********************************************************************
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C64 switchable 8K cartridge emulation
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Copyright MESS Team.
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Visit http://mamedev.org for licensing and usage restrictions.
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**********************************************************************/
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/*
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4040 + Fast Hack'em
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PCB Layout
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----------
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|===========================|
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|=| |
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|=| SW1 |
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|=| ROM0 |
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|=| |
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|=| |
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|=| ROM1 |
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|=| |
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|=| |
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|===========================|
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ROM0,1 - National Semiconductor NMC27C64Q 8Kx8 EPROM
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SW1 - ROM selection switch
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*/
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#include "c64_sw8k.h"
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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const device_type C64_SW8K = &device_creator<c64_switchable_8k_cartridge_device>;
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//-------------------------------------------------
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// INPUT_PORTS( c64_easyflash )
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//-------------------------------------------------
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static INPUT_PORTS_START( c64_switchable_8k )
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PORT_START("SW")
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PORT_DIPNAME( 0x01, 0x00, "ROM Select" )
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PORT_DIPSETTING( 0x00, "ROM 0" )
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PORT_DIPSETTING( 0x01, "ROM 1" )
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INPUT_PORTS_END
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//-------------------------------------------------
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// input_ports - device-specific input ports
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//-------------------------------------------------
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ioport_constructor c64_switchable_8k_cartridge_device::device_input_ports() const
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{
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return INPUT_PORTS_NAME( c64_switchable_8k );
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}
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// c64_switchable_8k_cartridge_device - constructor
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//-------------------------------------------------
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c64_switchable_8k_cartridge_device::c64_switchable_8k_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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device_t(mconfig, C64_SW8K, "C64 Switchable 8K cartridge", tag, owner, clock),
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device_c64_expansion_card_interface(mconfig, *this)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void c64_switchable_8k_cartridge_device::device_start()
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{
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void c64_switchable_8k_cartridge_device::device_reset()
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{
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m_bank = ioport("SW")->read();
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}
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//-------------------------------------------------
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// c64_cd_r - cartridge data read
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//-------------------------------------------------
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UINT8 c64_switchable_8k_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int ba, int roml, int romh, int io1, int io2)
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{
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if (!roml)
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{
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offs_t addr = (m_bank << 13) | (offset & 0x1fff);
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data = m_roml[addr];
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}
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return data;
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}
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