(nw) trs80dt1 : added 7474 device and fixed a mistake...doesn't fix any issues though.
parent
e30ba781a4
commit
c435ebb6ad
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@ -10,7 +10,6 @@ Mihajlo Pupin Institute
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Notes:
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Notes:
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- Serial terminals appear to need 8 bits, 2 stop bits, odd parity @ 9600
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- Serial terminals appear to need 8 bits, 2 stop bits, odd parity @ 9600
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- Unable to set these settings as default, because std::bad_cast fatal error occurs at start
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- Unable to type anything as it seems uarts want BRKDET activated all the time, which we cannot do.
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- Unable to type anything as it seems uarts want BRKDET activated all the time, which we cannot do.
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- Unable to find any technical info at all, so it's all guesswork.
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- Unable to find any technical info at all, so it's all guesswork.
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@ -33,6 +33,7 @@ You can get into the setup menu by pressing Ctrl+Shift+Enter.
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#include "emu.h"
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#include "emu.h"
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#include "cpu/mcs51/mcs51.h"
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#include "cpu/mcs51/mcs51.h"
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#include "video/i8275.h"
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#include "video/i8275.h"
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#include "machine/7474.h"
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#include "machine/x2212.h"
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#include "machine/x2212.h"
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#include "sound/beep.h"
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#include "sound/beep.h"
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#include "screen.h"
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#include "screen.h"
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@ -52,6 +53,7 @@ public:
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, m_nvram(*this,"nvram")
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, m_nvram(*this,"nvram")
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, m_keyboard(*this, "X%u", 0)
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, m_keyboard(*this, "X%u", 0)
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, m_beep(*this, "beeper")
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, m_beep(*this, "beeper")
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, m_7474(*this, "7474")
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{ }
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{ }
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DECLARE_READ8_MEMBER(dma_r);
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DECLARE_READ8_MEMBER(dma_r);
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@ -59,12 +61,9 @@ public:
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DECLARE_WRITE8_MEMBER(store_w);
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DECLARE_WRITE8_MEMBER(store_w);
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DECLARE_WRITE8_MEMBER(port1_w);
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DECLARE_WRITE8_MEMBER(port1_w);
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DECLARE_WRITE8_MEMBER(port3_w);
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DECLARE_WRITE8_MEMBER(port3_w);
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DECLARE_WRITE_LINE_MEMBER(irq_w);
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DECLARE_WRITE_LINE_MEMBER(hrtc_w);
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I8275_DRAW_CHARACTER_MEMBER(crtc_update_row);
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I8275_DRAW_CHARACTER_MEMBER(crtc_update_row);
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private:
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private:
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bool m_irq_state;
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bool m_bow;
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bool m_bow;
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virtual void machine_reset() override;
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virtual void machine_reset() override;
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virtual void machine_start() override;
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virtual void machine_start() override;
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@ -76,13 +75,14 @@ private:
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required_device<x2210_device> m_nvram;
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required_device<x2210_device> m_nvram;
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required_ioport_array<10> m_keyboard;
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required_ioport_array<10> m_keyboard;
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required_device<beep_device> m_beep;
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required_device<beep_device> m_beep;
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required_device<ttl7474_device> m_7474;
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};
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};
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void trs80dt1_state::machine_reset()
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void trs80dt1_state::machine_reset()
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{
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{
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m_irq_state = 0;
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m_bow = 0;
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m_bow = 0;
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// line is actually active low in the real chip
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m_7474->preset_w(1);
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// line is active low in the real chip
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m_nvram->recall(1);
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m_nvram->recall(1);
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m_nvram->recall(0);
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m_nvram->recall(0);
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}
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}
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@ -102,21 +102,9 @@ READ8_MEMBER( trs80dt1_state::key_r )
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return 0xff;
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return 0xff;
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}
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}
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WRITE_LINE_MEMBER( trs80dt1_state::irq_w )
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{
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if (!state && m_irq_state)
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m_maincpu->set_input_line(MCS51_INT1_LINE, CLEAR_LINE);
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m_irq_state = state;
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}
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WRITE_LINE_MEMBER( trs80dt1_state::hrtc_w )
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{
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m_maincpu->set_input_line(MCS51_INT1_LINE, m_irq_state ? HOLD_LINE : CLEAR_LINE);
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}
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WRITE8_MEMBER( trs80dt1_state::store_w )
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WRITE8_MEMBER( trs80dt1_state::store_w )
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{
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{
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// line is actually active low in the real chip
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// line is active low in the real chip
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m_nvram->store(1);
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m_nvram->store(1);
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m_nvram->store(0);
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m_nvram->store(0);
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}
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}
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@ -329,14 +317,18 @@ static MACHINE_CONFIG_START( trs80dt1 )
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MCFG_DEVICE_ADD("crtc", I8275, 12480000 / 8)
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MCFG_DEVICE_ADD("crtc", I8275, 12480000 / 8)
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MCFG_I8275_CHARACTER_WIDTH(8)
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MCFG_I8275_CHARACTER_WIDTH(8)
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MCFG_I8275_DRAW_CHARACTER_CALLBACK_OWNER(trs80dt1_state, crtc_update_row)
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MCFG_I8275_DRAW_CHARACTER_CALLBACK_OWNER(trs80dt1_state, crtc_update_row)
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MCFG_I8275_DRQ_CALLBACK(INPUTLINE("maincpu", MCS51_INT0_LINE)) // BRDY pin
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MCFG_I8275_DRQ_CALLBACK(INPUTLINE("maincpu", MCS51_INT0_LINE)) // BRDY pin goes through inverter to /INT0, so we don't invert
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MCFG_I8275_IRQ_CALLBACK(WRITELINE(trs80dt1_state, irq_w)) // INT pin
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MCFG_I8275_IRQ_CALLBACK(DEVWRITELINE("7474", ttl7474_device, clear_w)) // INT pin
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MCFG_I8275_HRTC_CALLBACK(WRITELINE(trs80dt1_state, hrtc_w))
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MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("7474", ttl7474_device, d_w))
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MCFG_I8275_VRTC_CALLBACK(DEVWRITELINE("7474", ttl7474_device, clock_w))
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MCFG_VIDEO_SET_SCREEN("screen")
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MCFG_VIDEO_SET_SCREEN("screen")
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MCFG_PALETTE_ADD("palette", 3)
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MCFG_PALETTE_ADD("palette", 3)
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MCFG_X2210_ADD("nvram")
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MCFG_X2210_ADD("nvram")
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MCFG_DEVICE_ADD("7474", TTL7474, 0)
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MCFG_7474_COMP_OUTPUT_CB(INPUTLINE("maincpu", MCS51_INT1_LINE)) MCFG_DEVCB_INVERT // /Q connects directly to /INT1, so we need to invert?
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/* sound hardware */
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/* sound hardware */
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MCFG_SPEAKER_STANDARD_MONO("mono")
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MCFG_SPEAKER_STANDARD_MONO("mono")
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MCFG_SOUND_ADD("beeper", BEEP, 2000)
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MCFG_SOUND_ADD("beeper", BEEP, 2000)
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