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(nw) trs80dt1 : added nvram, fixed debug crash, fixed modifier keys. Can enter setup.

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This commit is contained in:
Robbbert 2017-10-26 16:14:30 +11:00
parent 9ddd68afce
commit da6baf0f21
1 changed files with 36 additions and 17 deletions
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53
src/mame/drivers/trs80dt1.cpp
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@ -19,16 +19,20 @@ ToDo:
- Serial i/o
- Centronics printer
- Fix video (it is hooked up as per schematic, but when text is present it
scrolls crazily and flickers, also in debug the input-line queue can overflow).
scrolls crazily and flickers).
- Check that attributes are correctly applied
- Keyboard is coded but not tested.
- Add the nvram
- When a key is pressed it endlessly autorepeats.
- Connect up ports 1 and 3.
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/x2212.h"
#include "screen.h"
//#include "logmacro.h"
@ -42,11 +46,13 @@ public:
, m_maincpu(*this, "maincpu")
, m_palette(*this, "palette")
, m_crtc(*this, "crtc")
, m_nvram(*this,"nvram")
, m_keyboard(*this, "X%u", 0)
{ }
DECLARE_READ8_MEMBER(dma_r);
DECLARE_READ8_MEMBER(key_r);
DECLARE_WRITE8_MEMBER(store_w);
DECLARE_WRITE_LINE_MEMBER(irq_w);
DECLARE_WRITE_LINE_MEMBER(hrtc_w);
I8275_DRAW_CHARACTER_MEMBER(crtc_update_row);
@ -60,12 +66,16 @@ private:
required_device<cpu_device> m_maincpu;
required_device<palette_device> m_palette;
required_device<i8275_device> m_crtc;
required_device<x2210_device> m_nvram;
required_ioport_array<9> m_keyboard;
};
void trs80dt1_state::machine_reset()
{
m_irq_state = 0;
// line is actually active low in the real chip
m_nvram->recall(1);
m_nvram->recall(0);
}
READ8_MEMBER( trs80dt1_state::dma_r )
@ -85,9 +95,9 @@ READ8_MEMBER( trs80dt1_state::key_r )
WRITE_LINE_MEMBER( trs80dt1_state::irq_w )
{
m_irq_state = state;
if (!state)
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 )
@ -95,8 +105,15 @@ 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
m_nvram->store(1);
m_nvram->store(0);
}
static ADDRESS_MAP_START( prg_map, AS_PROGRAM, 8, trs80dt1_state )
AM_RANGE(0x0000, 0x0fff) AM_ROM // AM_REGION("roms", 0) AM_REGION ignored for this cpu
AM_RANGE(0x0000, 0x0fff) AM_ROM
AM_RANGE(0x2000, 0x27ff) AM_READ(dma_r)
ADDRESS_MAP_END
@ -106,10 +123,10 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START( io_map, AS_IO, 8, trs80dt1_state )
ADDRESS_MAP_GLOBAL_MASK(0xbfff) // A14 not used
AM_RANGE(0xa000, 0xa7ff) AM_RAM AM_SHARE("videoram")
//AM_RANGE(0xa800, 0xabff) AM_RAM //NVRAM array select
AM_RANGE(0xa800, 0xa83f) AM_MIRROR(0x3c0) AM_DEVREADWRITE("nvram", x2210_device, read, write) // X2210
AM_RANGE(0xac00, 0xafff) AM_READ(key_r)
AM_RANGE(0xb000, 0xb3ff) AM_READ_PORT("X9") //keyboard/RS232 input read
//AM_RANGE(0xb400, 0xb7ff) AM_RAM //NVRAM write select
AM_RANGE(0xb000, 0xb3ff) AM_READ_PORT("X9") // also reads some RS232 inputs
AM_RANGE(0xb400, 0xb7ff) AM_WRITE(store_w)
AM_RANGE(0xbc00, 0xbc01) AM_MIRROR(0x3fe) AM_DEVREADWRITE("crtc", i8275_device, read, write) // i8276
//AM_RANGE(MCS51_PORT_P0, MCS51_PORT_P3) AM_READWRITE(port_r, port_w)
ADDRESS_MAP_END
@ -207,14 +224,14 @@ static INPUT_PORTS_START( trs80dt1 )
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("X9")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RCONTROL) PORT_CODE(KEYCODE_LCONTROL)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_RCONTROL) PORT_CODE(KEYCODE_LCONTROL)
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
INPUT_PORTS_END
void trs80dt1_state::machine_start()
@ -282,6 +299,8 @@ static MACHINE_CONFIG_START( trs80dt1 )
MCFG_I8275_HRTC_CALLBACK(WRITELINE(trs80dt1_state, hrtc_w))
MCFG_VIDEO_SET_SCREEN("screen")
MCFG_PALETTE_ADD("palette", 3)
MCFG_X2210_ADD("nvram")
MACHINE_CONFIG_END
ROM_START( trs80dt1 )