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Diffstat (limited to 'src/mess/machine/p2000t.c')
-rw-r--r-- | src/mess/machine/p2000t.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/src/mess/machine/p2000t.c b/src/mess/machine/p2000t.c deleted file mode 100644 index 224e2e462ae..00000000000 --- a/src/mess/machine/p2000t.c +++ /dev/null @@ -1,157 +0,0 @@ -// license:??? -// copyright-holders:Paul Daniels -/********************************************************************** - - machine.c - - Functions to emulate general aspects of the machine (RAM, ROM, interrups, - I/O ports) - -**********************************************************************/ - -#include "includes/p2000t.h" - -#define P2000M_101F_CASDAT 0x01 -#define P2000M_101F_CASCMD 0x02 -#define P2000M_101F_CASREW 0x04 -#define P2000M_101F_CASFOR 0x08 -#define P2000M_101F_KEYINT 0x40 -#define P2000M_101F_PRNOUT 0x80 - -#define P2000M_202F_PINPUT 0x01 -#define P2000M_202F_PREADY 0x02 -#define P2000M_202F_STRAPN 0x04 -#define P2000M_202F_CASENB 0x08 -#define P2000M_202F_CASPOS 0x10 -#define P2000M_202F_CASEND 0x20 -#define P2000M_202F_CASCLK 0x40 -#define P2000M_202F_CASDAT 0x80 - -#define P2000M_303F_VIDEO 0x01 - -#define P2000M_707F_DISA 0x01 - -/* - Keyboard port 0x0x - - If the keyboard interrupt is enabled, all keyboard matrix rows are - connected and reading from either of these ports will give the - keyboard status (FF=no key pressed) - - If the keyboard interrupt is disabled, reading one of these ports - will read the corresponding keyboard matrix row -*/ -READ8_MEMBER( p2000t_state::p2000t_port_000f_r ) -{ - if (m_port_101f & P2000M_101F_KEYINT) - { - return ( - m_keyboard[0]->read() & m_keyboard[1]->read() & - m_keyboard[2]->read() & m_keyboard[3]->read() & - m_keyboard[4]->read() & m_keyboard[5]->read() & - m_keyboard[6]->read() & m_keyboard[7]->read() & - m_keyboard[8]->read() & m_keyboard[9]->read()); - } - else - if (offset < 10) - { - return m_keyboard[offset]->read(); - } - else - return 0xff; -} - - -/* - Input port 0x2x - - bit 0 - Printer input - bit 1 - Printer ready - bit 2 - Strap N (daisy/matrix) - bit 3 - Cassette write enabled - bit 4 - Cassette in position - bit 5 - Begin/end of tape - bit 6 - Cassette read clock - bit 7 - Cassette read data -*/ -READ8_MEMBER( p2000t_state::p2000t_port_202f_r ) -{ - return (0xff); -} - - -/* - Output Port 0x1x - - bit 0 - Cassette write data - bit 1 - Cassette write command - bit 2 - Cassette rewind - bit 3 - Cassette forward - bit 4 - Unused - bit 5 - Unused - bit 6 - Keyboard interrupt enable - bit 7 - Printer output -*/ -WRITE8_MEMBER( p2000t_state::p2000t_port_101f_w ) -{ - m_port_101f = data; -} - -/* - Scroll Register 0x3x (P2000T only) - - bit 0 - / - bit 1 - | - bit 2 - | Index of the first character - bit 3 - | to be displayed - bit 4 - | - bit 5 - | - bit 6 - \ - bit 7 - Video disable (0 = enabled) -*/ -WRITE8_MEMBER( p2000t_state::p2000t_port_303f_w ) -{ - m_port_303f = data; -} - -/* - Beeper 0x5x - - bit 0 - Beeper - bit 1 - Unused - bit 2 - Unused - bit 3 - Unused - bit 4 - Unused - bit 5 - Unused - bit 6 - Unused - bit 7 - Unused -*/ -WRITE8_MEMBER( p2000t_state::p2000t_port_505f_w ) -{ - m_speaker->level_w(BIT(data, 0)); -} - -/* - DISAS 0x7x (P2000M only) - - bit 0 - Unused - bit 1 - DISAS enable - bit 2 - Unused - bit 3 - Unused - bit 4 - Unused - bit 5 - Unused - bit 6 - Unused - bit 7 - Unused - - When the DISAS is active, the CPU has the highest priority and - video refresh is disabled when the CPU accesses video memory - -*/ -WRITE8_MEMBER( p2000t_state::p2000t_port_707f_w ) -{ - m_port_707f = data; -} - -WRITE8_MEMBER( p2000t_state::p2000t_port_888b_w ) {} -WRITE8_MEMBER( p2000t_state::p2000t_port_8c90_w ) {} -WRITE8_MEMBER( p2000t_state::p2000t_port_9494_w ) {} |