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Diffstat (limited to 'src/mame/machine/poly88.c')
-rw-r--r-- | src/mame/machine/poly88.c | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/src/mame/machine/poly88.c b/src/mame/machine/poly88.c new file mode 100644 index 00000000000..47db0168f92 --- /dev/null +++ b/src/mame/machine/poly88.c @@ -0,0 +1,332 @@ +// license:BSD-3-Clause +// copyright-holders:Miodrag Milanovic +/*************************************************************************** + + Poly-88 machine by Miodrag Milanovic + + 18/05/2009 Initial implementation + +****************************************************************************/ + +#include "emu.h" +#include "cpu/i8085/i8085.h" +#include "imagedev/cassette.h" +#include "includes/poly88.h" + + +void poly88_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) +{ + switch (id) + { + case TIMER_USART: + poly88_usart_timer_callback(ptr, param); + break; + case TIMER_KEYBOARD: + keyboard_callback(ptr, param); + break; + case TIMER_CASSETTE: + poly88_cassette_timer_callback(ptr, param); + break; + default: + assert_always(FALSE, "Unknown id in poly88_state::device_timer"); + } +} + + +TIMER_CALLBACK_MEMBER(poly88_state::poly88_usart_timer_callback) +{ + m_int_vector = 0xe7; + m_maincpu->set_input_line(0, HOLD_LINE); +} + +WRITE8_MEMBER(poly88_state::poly88_baud_rate_w) +{ + logerror("poly88_baud_rate_w %02x\n",data); + m_usart_timer = timer_alloc(TIMER_USART); + m_usart_timer->adjust(attotime::zero, 0, attotime::from_hz(300)); + +} + +UINT8 poly88_state::row_number(UINT8 code) { + if BIT(code,0) return 0; + if BIT(code,1) return 1; + if BIT(code,2) return 2; + if BIT(code,3) return 3; + if BIT(code,4) return 4; + if BIT(code,5) return 5; + if BIT(code,6) return 6; + if BIT(code,7) return 7; + return 0; +} + +TIMER_CALLBACK_MEMBER(poly88_state::keyboard_callback) +{ + int i; + UINT8 code; + UINT8 key_code = 0; + UINT8 shift = m_linec->read() & 0x02 ? 1 : 0; + UINT8 ctrl = m_linec->read() & 0x01 ? 1 : 0; + + for(i = 0; i < 7; i++) + { + switch ( i ) + { + case 0: code = m_line0->read(); break; + case 1: code = m_line1->read(); break; + case 2: code = m_line2->read(); break; + case 3: code = m_line3->read(); break; + case 4: code = m_line4->read(); break; + case 5: code = m_line5->read(); break; + case 6: code = m_line6->read(); break; + default: code = 0; + } + if (code != 0) + { + if (i==0 && shift==0) { + key_code = 0x30 + row_number(code) + 8*i; // for numbers and some signs + } + if (i==0 && shift==1) { + key_code = 0x20 + row_number(code) + 8*i; // for shifted numbers + } + if (i==1 && shift==0) { + if (row_number(code) < 4) { + key_code = 0x30 + row_number(code) + 8*i; // for numbers and some signs + } else { + key_code = 0x20 + row_number(code) + 8*i; // for numbers and some signs + } + } + if (i==1 && shift==1) { + if (row_number(code) < 4) { + key_code = 0x20 + row_number(code) + 8*i; // for numbers and some signs + } else { + key_code = 0x30 + row_number(code) + 8*i; // for numbers and some signs + } + } + if (i>=2 && i<=4 && shift==1 && ctrl==0) { + key_code = 0x60 + row_number(code) + (i-2)*8; // for small letters + } + if (i>=2 && i<=4 && shift==0 && ctrl==0) { + key_code = 0x40 + row_number(code) + (i-2)*8; // for big letters + } + if (i>=2 && i<=4 && ctrl==1) { + key_code = 0x00 + row_number(code) + (i-2)*8; // for CTRL + letters + } + if (i==5 && shift==1 && ctrl==0) { + if (row_number(code)<7) { + key_code = 0x60 + row_number(code) + (i-2)*8; // for small letters + } else { + key_code = 0x40 + row_number(code) + (i-2)*8; // for signs it is switched + } + } + if (i==5 && shift==0 && ctrl==0) { + if (row_number(code)<7) { + key_code = 0x40 + row_number(code) + (i-2)*8; // for small letters + } else { + key_code = 0x60 + row_number(code) + (i-2)*8; // for signs it is switched + } + } + if (i==5 && shift==0 && ctrl==1) { + key_code = 0x00 + row_number(code) + (i-2)*8; // for letters + ctrl + } + if (i==6) { + switch(row_number(code)) + { + case 0: key_code = 0x11; break; + case 1: key_code = 0x12; break; + case 2: key_code = 0x13; break; + case 3: key_code = 0x14; break; + case 4: key_code = 0x20; break; // Space + case 5: key_code = 0x0D; break; // Enter + case 6: key_code = 0x09; break; // TAB + case 7: key_code = 0x0A; break; // LF + } + } + } + } + if (key_code==0 && m_last_code !=0){ + m_int_vector = 0xef; + m_maincpu->set_input_line(0, HOLD_LINE); + } else { + m_last_code = key_code; + } + + timer_set(attotime::from_hz(24000), TIMER_KEYBOARD); +} + +IRQ_CALLBACK_MEMBER(poly88_state::poly88_irq_callback) +{ + return m_int_vector; +} + +WRITE_LINE_MEMBER(poly88_state::write_cas_tx) +{ + m_cas_tx = state; +} + +TIMER_CALLBACK_MEMBER(poly88_state::poly88_cassette_timer_callback) +{ + int data; + int current_level; + +// if (!(ioport("DSW0")->read() & 0x02)) /* V.24 / Tape Switch */ + //{ + /* tape reading */ + if (m_cassette->get_state()&CASSETTE_PLAY) + { + if (m_clk_level_tape) + { + m_previous_level = (m_cassette->input() > 0.038) ? 1 : 0; + m_clk_level_tape = 0; + } + else + { + current_level = (m_cassette->input() > 0.038) ? 1 : 0; + + if (m_previous_level!=current_level) + { + data = (!m_previous_level && current_level) ? 1 : 0; +//data = current_level; + m_uart->write_rxd(data); + + m_clk_level_tape = 1; + } + } + + m_uart->write_rxc(m_clk_level_tape); + } + + /* tape writing */ + if (m_cassette->get_state()&CASSETTE_RECORD) + { + data = m_cas_tx; + data ^= m_clk_level_tape; + m_cassette->output(data&0x01 ? 1 : -1); + + m_clk_level_tape = m_clk_level_tape ? 0 : 1; + m_uart->write_txc(m_clk_level_tape); + + return; + } + + m_clk_level_tape = 1; + + m_clk_level = m_clk_level ? 0 : 1; + m_uart->write_txc(m_clk_level); +// } +} + + +DRIVER_INIT_MEMBER(poly88_state,poly88) +{ + m_previous_level = 0; + m_clk_level = m_clk_level_tape = 1; + m_cassette_timer = timer_alloc(TIMER_CASSETTE); + m_cassette_timer->adjust(attotime::zero, 0, attotime::from_hz(600)); + + timer_set(attotime::from_hz(24000), TIMER_KEYBOARD); +} + +void poly88_state::machine_reset() +{ + m_intr = 0; + m_last_code = 0; +} + +INTERRUPT_GEN_MEMBER(poly88_state::poly88_interrupt) +{ + m_int_vector = 0xf7; + device.execute().set_input_line(0, HOLD_LINE); +} + +WRITE_LINE_MEMBER(poly88_state::poly88_usart_rxready) +{ + //drvm_int_vector = 0xe7; + //execute().set_input_line(0, HOLD_LINE); +} + +READ8_MEMBER(poly88_state::poly88_keyboard_r) +{ + UINT8 retVal = m_last_code; + m_maincpu->set_input_line(0, CLEAR_LINE); + m_last_code = 0x00; + return retVal; +} + +WRITE8_MEMBER(poly88_state::poly88_intr_w) +{ + m_maincpu->set_input_line(0, CLEAR_LINE); +} + +SNAPSHOT_LOAD_MEMBER( poly88_state, poly88 ) +{ + address_space &space = m_maincpu->space(AS_PROGRAM); + UINT8* data= auto_alloc_array(machine(), UINT8, snapshot_size); + UINT16 recordNum; + UINT16 recordLen; + UINT16 address; + UINT8 recordType; + + int pos = 0x300; + char name[9]; + int i = 0; + int theend = 0; + + image.fread( data, snapshot_size); + + while (pos<snapshot_size) { + for(i=0;i<9;i++) { + name[i] = (char) data[pos + i]; + } + pos+=8; + name[8] = 0; + + + recordNum = data[pos]+ data[pos+1]*256; pos+=2; + recordLen = data[pos]; pos++; + if (recordLen==0) recordLen=0x100; + address = data[pos] + data[pos+1]*256; pos+=2; + recordType = data[pos]; pos++; + + logerror("Block :%s number:%d length: %d address=%04x type:%d\n",name,recordNum,recordLen,address, recordType); + switch(recordType) { + case 0 : + /* 00 Absolute */ + memcpy(space.get_read_ptr(address ), data + pos ,recordLen); + break; + case 1 : + /* 01 Comment */ + break; + case 2 : + /* 02 End */ + theend = 1; + break; + case 3 : + /* 03 Auto Start @ Address */ + m_maincpu->set_state_int(I8085_PC, address); + theend = 1; + break; + case 4 : + /* 04 Data ( used by Assembler ) */ + logerror("ASM load unsupported\n"); + theend = 1; + break; + case 5 : + /* 05 BASIC program file */ + logerror("BASIC load unsupported\n"); + theend = 1; + break; + case 6 : + /* 06 End ( used by Assembler? ) */ + theend = 1; + break; + default: break; + } + + if (theend) { + break; + } + pos+=recordLen; + } + machine().device("uart")->reset(); + return IMAGE_INIT_PASS; +} |