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micro20: hack to start up at MacsBug/shell entry point, plus add terminal and devices. [R. Belmont]
This commit is contained in:
arbee
parent
cc979fbbf3
commit
1f001e6168
1 changed files with 43 additions and 29 deletions
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@ -4,9 +4,9 @@
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micro20.cpp
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GMX Micro 20 single-board computer
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68020 + 68881 FPU
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800a5e = end of initial 68020 torture test
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****************************************************************************/
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@ -16,14 +16,15 @@
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#include "machine/msm58321.h"
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#include "machine/wd_fdc.h"
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#include "machine/68230pit.h"
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#include "bus/rs232/rs232.h"
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#include "softlist.h"
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#define MAINCPU_TAG "maincpu"
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#define DUART_A_TAG "duarta"
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#define DUART_B_TAG "duartb"
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#define RTC_TAG "rtc"
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#define FDC_TAG "fdc"
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#define PIT_TAG "pit"
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#define RTC_TAG "rtc"
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#define FDC_TAG "fdc"
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#define PIT_TAG "pit"
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class micro20_state : public driver_device
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{
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@ -41,12 +42,13 @@ public:
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required_memory_region m_rom;
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required_shared_ptr<uint32_t> m_mainram;
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required_device<pit68230_device> m_pit;
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virtual void machine_start() override;
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virtual void machine_reset() override;
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DECLARE_WRITE_LINE_MEMBER(m68k_reset_callback);
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DECLARE_READ32_MEMBER(buserror_r);
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private:
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};
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@ -59,11 +61,11 @@ void micro20_state::machine_reset()
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{
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uint32_t *pROM = (uint32_t *)m_rom->base();
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uint32_t *pRAM = (uint32_t *)m_mainram.target();
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pRAM[0] = pROM[0];
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pRAM[1] = pROM[1];
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pRAM[0] = pROM[2];
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pRAM[1] = pROM[3];
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m_maincpu->reset();
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m_maincpu->set_reset_callback(write_line_delegate(FUNC(micro20_state::m68k_reset_callback),this));
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}
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@ -73,19 +75,26 @@ WRITE_LINE_MEMBER(micro20_state::m68k_reset_callback)
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m_pit->reset();
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}
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READ32_MEMBER(micro20_state::buserror_r)
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{
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m_maincpu->set_input_line(M68K_LINE_BUSERROR, ASSERT_LINE);
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m_maincpu->set_input_line(M68K_LINE_BUSERROR, CLEAR_LINE);
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return 0xffff;
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}
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/***************************************************************************
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ADDRESS MAPS
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***************************************************************************/
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static ADDRESS_MAP_START(micro20_map, AS_PROGRAM, 32, micro20_state )
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AM_RANGE(0x00000000, 0x001fffff) AM_RAM AM_SHARE("mainram")
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AM_RANGE(0x00200000, 0x002fffff) AM_READ(buserror_r)
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AM_RANGE(0x00800000, 0x0083ffff) AM_ROM AM_REGION("bootrom", 0)
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AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, status_r, cmd_w, 0xff000000)
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AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, track_r, track_w, 0x00ff0000)
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AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, sector_r, sector_w, 0x0000ff00)
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AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, data_r, data_w, 0x000000ff)
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AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, status_r, cmd_w, 0xff000000)
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AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, track_r, track_w, 0x00ff0000)
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AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, sector_r, sector_w, 0x0000ff00)
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AM_RANGE(0xffff8000, 0xffff8003) AM_DEVREADWRITE8(FDC_TAG, wd1772_t, data_r, data_w, 0x000000ff)
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AM_RANGE(0xffff8080, 0xffff808f) AM_DEVREADWRITE8(DUART_A_TAG, mc68681_device, read, write, 0xffffffff)
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AM_RANGE(0xffff80a0, 0xffff80af) AM_DEVREADWRITE8(DUART_B_TAG, mc68681_device, read, write, 0xffffffff)
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AM_RANGE(0xffff80a0, 0xffff80af) AM_DEVREADWRITE8(DUART_B_TAG, mc68681_device, read, write, 0xffffffff)
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AM_RANGE(0xffff80c0, 0xffff80df) AM_DEVREADWRITE8(PIT_TAG, pit68230_device, read, write, 0xffffffff)
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ADDRESS_MAP_END
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@ -93,19 +102,24 @@ static MACHINE_CONFIG_START( micro20, micro20_state )
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/* basic machine hardware */
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MCFG_CPU_ADD(MAINCPU_TAG, M68020, XTAL_16_67MHz)
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MCFG_CPU_PROGRAM_MAP(micro20_map)
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MCFG_MC68681_ADD(DUART_A_TAG, XTAL_3_6864MHz)
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// MCFG_MC68681_IRQ_CALLBACK(WRITELINE(vt240_state, irq13_w))
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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_MC68681_A_TX_CALLBACK(DEVWRITELINE("rs232", rs232_port_device, write_txd))
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MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal")
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MCFG_RS232_RXD_HANDLER(DEVWRITELINE(DUART_A_TAG, mc68681_device, rx_a_w))
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// MCFG_MC68681_IRQ_CALLBACK(WRITELINE(vt240_state, irq13_w))
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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_MC68681_ADD(DUART_B_TAG, XTAL_3_6864MHz)
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MCFG_DEVICE_ADD(RTC_TAG, MSM58321, XTAL_32_768kHz)
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MCFG_WD1772_ADD(FDC_TAG, XTAL_16_67MHz / 2)
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MCFG_DEVICE_ADD(PIT_TAG, PIT68230, XTAL_16_67MHz / 2)
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MACHINE_CONFIG_END
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@ -121,10 +135,10 @@ INPUT_PORTS_END
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ROM_START( micro20 )
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ROM_REGION32_BE(0x40000, "bootrom", 0)
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ROM_LOAD32_BYTE( "d00-07_u6_6791.bin", 0x000003, 0x010000, CRC(63d66ea1) SHA1(c5dfbc4d81920e1d2e981c52c1af3d486d382a35) )
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ROM_LOAD32_BYTE( "d08-15_u8_0dc6.bin", 0x000002, 0x010000, CRC(d62ef21f) SHA1(2779d430b1a0b835807627e707d46547b29ef579) )
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ROM_LOAD32_BYTE( "d16-23_u10_e5b0.bin", 0x000001, 0x010000, CRC(cd7acf86) SHA1(db994ed714a1079fbb66616355e8f18d2d1a2005) )
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ROM_LOAD32_BYTE( "d24-31_u13_d115.bin", 0x000000, 0x010000, CRC(3646d943) SHA1(97ee54063e2fe49fef2ff68d0f2e39345a75eac5) )
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ROM_LOAD32_BYTE( "d00-07_u6_6791.bin", 0x000003, 0x010000, CRC(63d66ea1) SHA1(c5dfbc4d81920e1d2e981c52c1af3d486d382a35) )
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ROM_LOAD32_BYTE( "d08-15_u8_0dc6.bin", 0x000002, 0x010000, CRC(d62ef21f) SHA1(2779d430b1a0b835807627e707d46547b29ef579) )
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ROM_LOAD32_BYTE( "d16-23_u10_e5b0.bin", 0x000001, 0x010000, CRC(cd7acf86) SHA1(db994ed714a1079fbb66616355e8f18d2d1a2005) )
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ROM_LOAD32_BYTE( "d24-31_u13_d115.bin", 0x000000, 0x010000, CRC(3646d943) SHA1(97ee54063e2fe49fef2ff68d0f2e39345a75eac5) )
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ROM_END
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COMP( 1984, micro20, 0, 0, micro20, micro20, driver_device, 0, "GMX", "Micro 20", MACHINE_NOT_WORKING | MACHINE_NO_SOUND )
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