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(nw) trs80dt1 : added 7474 device and fixed a mistake...doesn't fix any issues though.

master
Robbbert 2017-11-02 04:07:14 +11:00
parent e30ba781a4
commit c435ebb6ad
2 changed files with 13 additions and 22 deletions
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1
src/mame/drivers/tim100.cpp
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@ -10,7 +10,6 @@ Mihajlo Pupin Institute
Notes:
- Serial terminals appear to need 8 bits, 2 stop bits, odd parity @ 9600
- Unable to set these settings as default, because std::bad_cast fatal error occurs at start
- Unable to type anything as it seems uarts want BRKDET activated all the time, which we cannot do.
- Unable to find any technical info at all, so it's all guesswork.

34
src/mame/drivers/trs80dt1.cpp
View File

@ -33,6 +33,7 @@ You can get into the setup menu by pressing Ctrl+Shift+Enter.
#include "emu.h"
#include "cpu/mcs51/mcs51.h"
#include "video/i8275.h"
#include "machine/7474.h"
#include "machine/x2212.h"
#include "sound/beep.h"
#include "screen.h"
@ -52,6 +53,7 @@ public:
, m_nvram(*this,"nvram")
, m_keyboard(*this, "X%u", 0)
, m_beep(*this, "beeper")
, m_7474(*this, "7474")
{ }
DECLARE_READ8_MEMBER(dma_r);
@ -59,12 +61,9 @@ public:
DECLARE_WRITE8_MEMBER(store_w);
DECLARE_WRITE8_MEMBER(port1_w);
DECLARE_WRITE8_MEMBER(port3_w);
DECLARE_WRITE_LINE_MEMBER(irq_w);
DECLARE_WRITE_LINE_MEMBER(hrtc_w);
I8275_DRAW_CHARACTER_MEMBER(crtc_update_row);
private:
bool m_irq_state;
bool m_bow;
virtual void machine_reset() override;
virtual void machine_start() override;
@ -76,13 +75,14 @@ private:
required_device<x2210_device> m_nvram;
required_ioport_array<10> m_keyboard;
required_device<beep_device> m_beep;
required_device<ttl7474_device> m_7474;
};
void trs80dt1_state::machine_reset()
{
m_irq_state = 0;
m_bow = 0;
// line is actually active low in the real chip
m_7474->preset_w(1);
// line is active low in the real chip
m_nvram->recall(1);
m_nvram->recall(0);
}
@ -102,21 +102,9 @@ READ8_MEMBER( trs80dt1_state::key_r )
return 0xff;
}
WRITE_LINE_MEMBER( trs80dt1_state::irq_w )
{
if (!state && m_irq_state)
m_maincpu->set_input_line(MCS51_INT1_LINE, CLEAR_LINE);
m_irq_state = state;
}
WRITE_LINE_MEMBER( trs80dt1_state::hrtc_w )
{
m_maincpu->set_input_line(MCS51_INT1_LINE, m_irq_state ? HOLD_LINE : CLEAR_LINE);
}
WRITE8_MEMBER( trs80dt1_state::store_w )
{
// line is actually active low in the real chip
// line is active low in the real chip
m_nvram->store(1);
m_nvram->store(0);
}
@ -329,14 +317,18 @@ static MACHINE_CONFIG_START( trs80dt1 )
MCFG_DEVICE_ADD("crtc", I8275, 12480000 / 8)
MCFG_I8275_CHARACTER_WIDTH(8)
MCFG_I8275_DRAW_CHARACTER_CALLBACK_OWNER(trs80dt1_state, crtc_update_row)
MCFG_I8275_DRQ_CALLBACK(INPUTLINE("maincpu", MCS51_INT0_LINE)) // BRDY pin
MCFG_I8275_IRQ_CALLBACK(WRITELINE(trs80dt1_state, irq_w)) // INT pin
MCFG_I8275_HRTC_CALLBACK(WRITELINE(trs80dt1_state, hrtc_w))
MCFG_I8275_DRQ_CALLBACK(INPUTLINE("maincpu", MCS51_INT0_LINE)) // BRDY pin goes through inverter to /INT0, so we don't invert
MCFG_I8275_IRQ_CALLBACK(DEVWRITELINE("7474", ttl7474_device, clear_w)) // INT pin
MCFG_DEVCB_CHAIN_OUTPUT(DEVWRITELINE("7474", ttl7474_device, d_w))
MCFG_I8275_VRTC_CALLBACK(DEVWRITELINE("7474", ttl7474_device, clock_w))
MCFG_VIDEO_SET_SCREEN("screen")
MCFG_PALETTE_ADD("palette", 3)
MCFG_X2210_ADD("nvram")
MCFG_DEVICE_ADD("7474", TTL7474, 0)
MCFG_7474_COMP_OUTPUT_CB(INPUTLINE("maincpu", MCS51_INT1_LINE)) MCFG_DEVCB_INVERT // /Q connects directly to /INT1, so we need to invert?
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("beeper", BEEP, 2000)