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micro20: hack to start up at MacsBug/shell entry point, plus add terminal and devices. [R. Belmont]

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This commit is contained in:
arbee 2016-11-26 22:06:02 -05:00
parent cc979fbbf3
commit 1f001e6168
1 changed files with 43 additions and 29 deletions
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18
src/mame/drivers/micro20.cpp
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@ -16,6 +16,7 @@
#include "machine/msm58321.h"
#include "machine/wd_fdc.h"
#include "machine/68230pit.h"
#include "bus/rs232/rs232.h"
#include "softlist.h"
#define MAINCPU_TAG "maincpu"
@ -46,6 +47,7 @@ public:
virtual void machine_reset() override;
DECLARE_WRITE_LINE_MEMBER(m68k_reset_callback);
DECLARE_READ32_MEMBER(buserror_r);
private:
@ -60,8 +62,8 @@ void micro20_state::machine_reset()
uint32_t *pROM = (uint32_t *)m_rom->base();
uint32_t *pRAM = (uint32_t *)m_mainram.target();
pRAM[0] = pROM[0];
pRAM[1] = pROM[1];
pRAM[0] = pROM[2];
pRAM[1] = pROM[3];
m_maincpu->reset();
m_maincpu->set_reset_callback(write_line_delegate(FUNC(micro20_state::m68k_reset_callback),this));
@ -73,12 +75,19 @@ WRITE_LINE_MEMBER(micro20_state::m68k_reset_callback)
m_pit->reset();
}
READ32_MEMBER(micro20_state::buserror_r)
{
m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
return 0xffff;
}
/***************************************************************************
ADDRESS MAPS
***************************************************************************/
static ADDRESS_MAP_START(micro20_map, AS_PROGRAM, 32, micro20_state )
AM_RANGE(0x00000000, 0x001fffff) AM_RAM AM_SHARE("mainram")
AM_RANGE(0x00200000, 0x002fffff) AM_READ(buserror_r)
AM_RANGE(0x00800000, 0x0083ffff) AM_ROM AM_REGION("bootrom", 0)
AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, status_r, cmd_w, 0xff000000)
AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, track_r, track_w, 0x00ff0000)
@ -95,6 +104,11 @@ static MACHINE_CONFIG_START( micro20, micro20_state )
MCFG_CPU_PROGRAM_MAP(micro20_map)
MCFG_MC68681_ADD(DUART_A_TAG, XTAL_3_6864MHz)
MCFG_MC68681_A_TX_CALLBACK(DEVWRITELINE("rs232", rs232_port_device, write_txd))
MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal")
MCFG_RS232_RXD_HANDLER(DEVWRITELINE(DUART_A_TAG, mc68681_device, rx_a_w))
// MCFG_MC68681_IRQ_CALLBACK(WRITELINE(vt240_state, irq13_w))
// MCFG_MC68681_A_TX_CALLBACK(DEVWRITELINE("host", rs232_port_device, write_txd))
// MCFG_MC68681_B_TX_CALLBACK(DEVWRITELINE("printer", rs232_port_device, write_txd))