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https://github.com/holub/mame
synced 2025-10-05 08:41:31 +03:00
vt240: WIP (nw)
t11: add reset output line (nw) mc68681: op tx/rx status lines (nw)
This commit is contained in:
cracyc
parent
97a3a3dd65
commit
a1e832cd32
@ -48,6 +48,7 @@ t11_device::t11_device(const machine_config &mconfig, device_type type, const ch
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: cpu_device(mconfig, type, name, tag, owner, clock, shortname, source)
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, m_program_config("program", ENDIANNESS_LITTLE, 16, 16, 0)
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, c_initial_mode(0)
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, m_out_reset_func(*this)
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{
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m_program_config.m_is_octal = true;
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memset(m_reg, 0x00, sizeof(m_reg));
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@ -58,6 +59,7 @@ t11_device::t11_device(const machine_config &mconfig, const char *tag, device_t
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: cpu_device(mconfig, T11, "T11", tag, owner, clock, "t11", __FILE__)
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, m_program_config("program", ENDIANNESS_LITTLE, 16, 16, 0)
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, c_initial_mode(0)
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, m_out_reset_func(*this)
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{
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m_program_config.m_is_octal = true;
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memset(m_reg, 0x00, sizeof(m_reg));
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@ -261,6 +263,7 @@ void t11_device::device_start()
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m_initial_pc = initial_pc[c_initial_mode >> 13];
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m_program = &space(AS_PROGRAM);
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m_direct = &m_program->direct();
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m_out_reset_func.resolve_safe();
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save_item(NAME(m_ppc.w.l));
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save_item(NAME(m_reg[0].w.l));
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@ -31,6 +31,8 @@ enum
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#define MCFG_T11_INITIAL_MODE(_mode) \
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t11_device::set_initial_mode(*device, _mode);
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#define MCFG_T11_RESET(_devcb) \
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t11_device::set_out_reset_func(*device, DEVCB_##_devcb);
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class t11_device : public cpu_device
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{
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@ -41,6 +43,7 @@ public:
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// static configuration helpers
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static void set_initial_mode(device_t &device, const UINT16 mode) { downcast<t11_device &>(device).c_initial_mode = mode; }
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template<class _Object> static devcb_base &set_out_reset_func(device_t &device, _Object object) { return downcast<t11_device &>(device).m_out_reset_func.set_callback(object); }
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protected:
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// device-level overrides
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@ -80,6 +83,7 @@ protected:
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int m_icount;
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address_space *m_program;
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direct_read_data *m_direct;
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devcb_write_line m_out_reset_func;
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inline int ROPCODE();
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inline int RBYTE(int addr);
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@ -260,7 +260,7 @@ void t11_device::op_0000(UINT16 op)
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case 0x02: /* RTI */ m_icount -= 24; PC = POP(); PSW = POP(); t11_check_irqs(); break;
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case 0x03: /* BPT */ m_icount -= 48; PUSH(PSW); PUSH(PC); PC = RWORD(0x0c); PSW = RWORD(0x0e); t11_check_irqs(); break;
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case 0x04: /* IOT */ m_icount -= 48; PUSH(PSW); PUSH(PC); PC = RWORD(0x10); PSW = RWORD(0x12); t11_check_irqs(); break;
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case 0x05: /* RESET */ m_icount -= 110; break;
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case 0x05: /* RESET */ m_out_reset_func(ASSERT_LINE); m_out_reset_func(CLEAR_LINE); m_icount -= 110; break;
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case 0x06: /* RTT */ m_icount -= 33; PC = POP(); PSW = POP(); t11_check_irqs(); break;
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default: illegal(op); break;
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}
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@ -174,6 +174,38 @@ void mc68681_device::update_interrupts()
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write_irq(CLEAR_LINE);
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m_read_vector = false; // clear IACK too
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}
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if(OPCR & 0xf0)
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{
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if(BIT(OPCR, 4))
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{
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if(BIT(ISR, 1))
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OPR |= 0x10;
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else
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OPR &= ~0x10;
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}
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if(BIT(OPCR, 5))
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{
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if(BIT(ISR, 5))
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OPR |= 0x20;
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else
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OPR &= ~0x20;
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}
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if(BIT(OPCR, 6))
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{
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if(BIT(ISR, 0))
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OPR |= 0x40;
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else
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OPR &= ~0x40;
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}
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if(BIT(OPCR, 7))
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{
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if(BIT(ISR, 4))
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OPR |= 0x80;
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else
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OPR &= ~0x80;
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}
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write_outport(OPR ^ 0xff);
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}
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}
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double mc68681_device::duart68681_get_ct_rate()
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@ -467,7 +499,7 @@ WRITE8_MEMBER( mc68681_device::write )
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break;
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case 0x0d: /* OPCR */
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if ((data != 0x00) && ((data & 0xc) != 0x4))
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if (((data & 0xf) != 0x00) && ((data & 0xc) != 0x4))
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logerror( "68681 (%s): Unhandled OPCR value: %02x\n", tag(), data);
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OPCR = data;
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break;
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@ -890,7 +890,7 @@ menu_plugins_configure::menu_plugins_configure(mame_ui_manager &mui, render_cont
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menu_plugins_configure::~menu_plugins_configure()
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{
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emu_file file_plugin(OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
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emu_file file_plugin(machine().options().ini_path(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS);
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if (file_plugin.open("plugin.ini") != osd_file::error::NONE)
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// Can't throw in a destructor, so let's ignore silently for
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// now. We shouldn't write files in a destructor in any case.
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@ -4,20 +4,6 @@
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DEC VT240
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31/03/2010 Skeleton driver.
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TODO:
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- understand how PCG works, it should be a funky i/o $30 to uPD7220 DMA
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transfer;
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- hook-up T11, rst65 irq + $20 reads are latches for that
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ROM POST notes:
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0x0139: ROM test
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0x015f: RAM test
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0x0071: RAM fill to 0x00
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0x1c8f: UPD7220
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// vt240: x2212 nvram at E56
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****************************************************************************/
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#include "emu.h"
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@ -54,6 +40,7 @@ public:
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m_i8085(*this, "charcpu"),
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m_i8251(*this, "i8251"),
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m_duart(*this, "duart"),
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m_host(*this, "host"),
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m_hgdc(*this, "upd7220"),
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m_bank(*this, "bank"),
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m_nvram(*this, "x2212"),
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@ -67,6 +54,7 @@ public:
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required_device<cpu_device> m_i8085;
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required_device<i8251_device> m_i8251;
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required_device<mc68681_device> m_duart;
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required_device<rs232_port_device> m_host;
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required_device<upd7220_device> m_hgdc;
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required_device<address_map_bank_device> m_bank;
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required_device<x2212_device> m_nvram;
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@ -80,11 +68,15 @@ public:
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DECLARE_WRITE_LINE_MEMBER(i8085_rdy_w);
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DECLARE_WRITE_LINE_MEMBER(lben_w);
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DECLARE_WRITE_LINE_MEMBER(tx_w);
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DECLARE_WRITE_LINE_MEMBER(t11_reset_w);
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DECLARE_READ_LINE_MEMBER(i8085_sid_r);
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DECLARE_READ8_MEMBER(i8085_comm_r);
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DECLARE_WRITE8_MEMBER(i8085_comm_w);
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DECLARE_READ8_MEMBER(t11_comm_r);
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DECLARE_WRITE8_MEMBER(t11_comm_w);
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DECLARE_READ8_MEMBER(duart_r);
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DECLARE_WRITE8_MEMBER(duart_w);
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DECLARE_WRITE8_MEMBER(duartout_w);
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DECLARE_READ8_MEMBER(mem_map_cs_r);
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DECLARE_WRITE8_MEMBER(mem_map_cs_w);
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DECLARE_READ8_MEMBER(ctrl_r);
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@ -130,6 +122,17 @@ WRITE_LINE_MEMBER(vt240_state::lben_w)
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m_lb = state ? false : true;
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}
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WRITE_LINE_MEMBER(vt240_state::t11_reset_w)
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{
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if(state == ASSERT_LINE)
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{
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m_duart->reset();
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m_i8251->reset();
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m_nvram->recall(ASSERT_LINE);
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m_nvram->recall(CLEAR_LINE);
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}
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}
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WRITE_LINE_MEMBER(vt240_state::tx_w)
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{
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if(m_lb)
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@ -216,6 +219,30 @@ WRITE8_MEMBER(vt240_state::i8085_comm_w)
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break;
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}
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}
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READ8_MEMBER(vt240_state::duart_r)
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{
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if(!(offset & 1))
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return m_duart->read(space, offset >> 1);
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return 0;
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}
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WRITE8_MEMBER(vt240_state::duart_w)
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{
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if(offset & 1)
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m_duart->write(space, offset >> 1, data);
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}
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WRITE8_MEMBER(vt240_state::duartout_w)
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{
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m_host->write_rts(BIT(data, 0) ? CLEAR_LINE : ASSERT_LINE);
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m_host->write_dtr(BIT(data, 2) ? CLEAR_LINE : ASSERT_LINE);
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m_maincpu->set_input_line(15, BIT(data, 4) ? CLEAR_LINE : ASSERT_LINE);
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m_maincpu->set_input_line(14, BIT(data, 5) ? CLEAR_LINE : ASSERT_LINE);
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m_maincpu->set_input_line(11, BIT(data, 6) ? CLEAR_LINE : ASSERT_LINE);
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m_maincpu->set_input_line(10, BIT(data, 7) ? CLEAR_LINE : ASSERT_LINE);
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}
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READ8_MEMBER(vt240_state::mem_map_cs_r)
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{
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return ~m_mem_map[offset];
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@ -228,7 +255,7 @@ WRITE8_MEMBER(vt240_state::mem_map_cs_w)
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READ8_MEMBER(vt240_state::ctrl_r)
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{
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return m_mem_map_sel | ((m_lb ? 0 : 1) << 3) | (m_i8085_rdy << 6) | (m_t11 << 7);
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return m_mem_map_sel | ((m_lb ? 0 : 1) << 3) | (m_i8085_rdy << 6) | (m_t11 << 7) | (1<<5); // no modem
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}
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WRITE8_MEMBER(vt240_state::mem_map_sel_w)
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@ -284,7 +311,11 @@ READ8_MEMBER(vt240_state::vom_r)
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{
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if(!BIT(m_reg0, 2))
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return m_vom[offset];
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return 0;
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// this hack passes a self test, is not a useful value normally
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// when vom read mode is disabled, the read latch is set to whatever map is
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// enabled and color is currently drawn, the self test fills the screen with 0xff
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// and reads it
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return m_vom[((m_reg0 & 3) << 2) + 3];
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}
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WRITE8_MEMBER(vt240_state::vom_w)
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@ -300,12 +331,10 @@ WRITE8_MEMBER(vt240_state::vom_w)
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READ16_MEMBER(vt240_state::vram_r)
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{
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if(space.debugger_access())
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return m_video_ram[offset & 0x3fff];
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if(!BIT(m_reg0, 3))
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if(!BIT(m_reg0, 3) || space.debugger_access())
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{
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offset = ((offset & 0x18000) >> 1) | (offset & 0x3fff);
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return m_video_ram[offset & 0x3fff];
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return m_video_ram[offset & 0x7fff];
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}
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return 0;
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}
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@ -429,7 +458,7 @@ static ADDRESS_MAP_START( vt240_mem, AS_PROGRAM, 16, vt240_state )
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AM_RANGE (0170140, 0170141) AM_WRITE8(nvr_store_w, 0x00ff)
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AM_RANGE (0171000, 0171003) AM_DEVREADWRITE8("i8251", i8251_device, data_r, data_w, 0x00ff)
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AM_RANGE (0171004, 0171007) AM_DEVREADWRITE8("i8251", i8251_device, status_r, control_w, 0x00ff)
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AM_RANGE (0172000, 0172077) AM_DEVREADWRITE8("duart", mc68681_device, read, write, 0x00ff)
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AM_RANGE (0172000, 0172077) AM_READWRITE8(duart_r, duart_w, 0x00ff)
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AM_RANGE (0173000, 0173003) AM_DEVREAD8("upd7220", upd7220_device, read, 0x00ff)
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AM_RANGE (0173040, 0173077) AM_READ8(vom_r, 0x00ff)
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AM_RANGE (0173140, 0173141) AM_READ8(char_buf_r, 0x00ff)
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@ -515,6 +544,7 @@ static MACHINE_CONFIG_START( vt240, vt240_state )
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MCFG_CPU_ADD("maincpu", T11, XTAL_7_3728MHz) // confirm
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MCFG_CPU_PROGRAM_MAP(vt240_mem)
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MCFG_T11_INITIAL_MODE(5 << 13)
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MCFG_T11_RESET(WRITELINE(vt240_state, t11_reset_w))
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MCFG_CPU_ADD("charcpu", I8085A, XTAL_16MHz / 4)
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MCFG_CPU_PROGRAM_MAP(vt240_char_mem)
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@ -545,13 +575,10 @@ static MACHINE_CONFIG_START( vt240, vt240_state )
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MCFG_VIDEO_SET_SCREEN("screen")
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MCFG_MC68681_ADD("duart", XTAL_3_6864MHz) /* 2681 duart (not 68681!) */
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// MCFG_MC68681_IRQ_CALLBACK(WRITELINE(dectalk_state, dectalk_duart_irq_handler))
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MCFG_MC68681_A_TX_CALLBACK(DEVWRITELINE("rs232", rs232_port_device, write_txd))
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// MCFG_MC68681_B_TX_CALLBACK(WRITELINE(dectalk_state, dectalk_duart_txa))
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// MCFG_MC68681_INPORT_CALLBACK(READ8(dectalk_state, dectalk_duart_input))
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// MCFG_MC68681_OUTPORT_CALLBACK(WRITE8(dectalk_state, dectalk_duart_output))
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// MCFG_I8251_DTR_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_dtr))
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// MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts))
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MCFG_MC68681_IRQ_CALLBACK(INPUTLINE("maincpu", 13))
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MCFG_MC68681_A_TX_CALLBACK(DEVWRITELINE("host", rs232_port_device, write_txd))
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MCFG_MC68681_B_TX_CALLBACK(DEVWRITELINE("printer", rs232_port_device, write_txd))
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MCFG_MC68681_OUTPORT_CALLBACK(WRITE8(vt240_state, duartout_w))
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MCFG_DEVICE_ADD("i8251", I8251, 0)
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MCFG_I8251_TXD_HANDLER(WRITELINE(vt240_state, tx_w))
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@ -565,9 +592,14 @@ static MACHINE_CONFIG_START( vt240, vt240_state )
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MCFG_DEVICE_ADD("keyboard_clock", CLOCK, 4800 * 64) // 8251 is set to /64 on the clock input
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MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(vt240_state, write_keyboard_clock))
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MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "null_modem")
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MCFG_RS232_PORT_ADD("host", default_rs232_devices, "null_modem")
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MCFG_RS232_RXD_HANDLER(DEVWRITELINE("duart", mc68681_device, rx_a_w))
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// MCFG_RS232_DSR_HANDLER(DEVWRITELINE("duart", mc68681_device, ipX_w))
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MCFG_RS232_DSR_HANDLER(DEVWRITELINE("duart", mc68681_device, ip5_w))
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MCFG_RS232_CTS_HANDLER(DEVWRITELINE("duart", mc68681_device, ip0_w))
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MCFG_RS232_PORT_ADD("printer", default_rs232_devices, nullptr)
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MCFG_RS232_RXD_HANDLER(DEVWRITELINE("duart", mc68681_device, rx_b_w))
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MCFG_RS232_DSR_HANDLER(DEVWRITELINE("duart", mc68681_device, ip1_w))
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MCFG_X2212_ADD("x2212")
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MACHINE_CONFIG_END
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