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r31428 Saturday 26th July, 2014 at 01:49:34 UTC by Barry Rodewald
gimix: removed ROM bank at 0xe800, changed disk drivers to be high density (Flex and OS-9 disks are 80-track), and added a hack (disabled by default) that gets OS-9 to run.
[src/mess/drivers]gimix.c

trunk/src/mess/drivers/gimix.c
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1313    Information Link:  http://www.backglass.org/duncan/gimix/
1414
1515    TODO:  Everything
16
17    Usage:
18    System boots into GMXBUG-09
19    To boot Flex, insert the Flex system disk (3.3 or later, must support the DMA disk controller), type U and press enter.
20    To boot OS-9, insert the OS-9 system disk, type O, and press Enter.
21    Note that booting OS-9 doesn't currently work without a timer hack.
1622*/
1723
1824#include "emu.h"
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8692      , m_bank16(*this, "bank16")
8793      , m_rombank1(*this, "rombank1")
8894      , m_rombank2(*this, "rombank2")
89      , m_rombank3(*this, "rombank3")
9095      , m_fixedrombank(*this, "fixedrombank")
9196   {}
9297
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106111   DECLARE_WRITE8_MEMBER(pia_pa_w);
107112   DECLARE_READ8_MEMBER(pia_pb_r);
108113   DECLARE_WRITE8_MEMBER(pia_pb_w);
114   TIMER_DEVICE_CALLBACK_MEMBER(test_timer_w);
109115
110116   DECLARE_FLOPPY_FORMATS(floppy_formats);
111117
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160166   required_device<address_map_bank_device> m_bank16;
161167   required_memory_bank m_rombank1;
162168   required_memory_bank m_rombank2;
163   required_memory_bank m_rombank3;
164169   required_memory_bank m_fixedrombank;
165170
166171};
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179184   AM_RANGE(0x0e240, 0x0e3af) AM_RAM
180185   AM_RANGE(0x0e3b0, 0x0e3b3) AM_READWRITE(dma_r, dma_w)  // DMA controller (custom?)
181186   AM_RANGE(0x0e3b4, 0x0e3b7) AM_READWRITE(fdc_r, fdc_w)  // FD1797 FDC
182   AM_RANGE(0x0e400, 0x0e7ff) AM_RAM
183   AM_RANGE(0x0e800, 0x0efff) AM_ROMBANK("rombank3")
187   AM_RANGE(0x0e400, 0x0e7ff) AM_RAM  // scratchpad RAM
188   AM_RANGE(0x0e800, 0x0efff) AM_RAM
184189   AM_RANGE(0x0f000, 0x0f7ff) AM_ROMBANK("rombank2")
185190   AM_RANGE(0x0f800, 0x0ffff) AM_ROMBANK("rombank1")
186191   //AM_RANGE(0x10000, 0x1ffff) AM_RAM
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249254      {
250255         m_rombank1->set_entry(2);
251256         m_rombank2->set_entry(3);
252         m_rombank3->set_entry(1);
253257         m_fixedrombank->set_entry(2);
254258         logerror("SYS: FPLA software latch set\n");
255259      }
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257261      {
258262         m_rombank1->set_entry(0);
259263         m_rombank2->set_entry(1);
260         m_rombank3->set_entry(2);
261264         m_fixedrombank->set_entry(0);
262265         logerror("SYS: FPLA software latch reset\n");
263266      }
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453456   m_term_data = 0;
454457   m_rombank1->set_entry(0);  // RAM banks are undefined on startup
455458   m_rombank2->set_entry(1);
456   m_rombank3->set_entry(2);
457459   m_fixedrombank->set_entry(0);
458460   m_dma_status = 0x00;
459461   m_dma_ctrl = 0x00;
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470472   UINT8* ROM = m_rom->base();
471473   m_rombank1->configure_entries(0,4,ROM,0x800);
472474   m_rombank2->configure_entries(0,4,ROM,0x800);
473   m_rombank3->configure_entries(0,4,ROM,0x800);
474475   m_fixedrombank->configure_entries(0,4,ROM+0x700,0x800);
475476   m_rombank1->set_entry(0);  // RAM banks are undefined on startup
476477   m_rombank2->set_entry(1);
477   m_rombank3->set_entry(2);
478478   m_fixedrombank->set_entry(0);
479479   // install any extra RAM
480480   if(m_ram->size() > 65536)
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512512   m_acia2->write_rxc(state);
513513}
514514
515TIMER_DEVICE_CALLBACK_MEMBER(gimix_state::test_timer_w)
516{
517   static bool prev;
518   if(!prev)
519   {
520      m_maincpu->set_input_line(M6809_IRQ_LINE,ASSERT_LINE);
521      prev = true;
522   }
523   else
524   {
525      m_maincpu->set_input_line(M6809_IRQ_LINE,CLEAR_LINE);
526      prev = false;
527   }
528}
529
515530FLOPPY_FORMATS_MEMBER( gimix_state::floppy_formats )
516531   FLOPPY_FLEX_FORMAT
517532FLOPPY_FORMATS_END
518533
519534static SLOT_INTERFACE_START( gimix_floppies )
520   SLOT_INTERFACE( "525dd", FLOPPY_525_DD )
535   SLOT_INTERFACE( "525hd", FLOPPY_525_HD )
521536SLOT_INTERFACE_END
522537
523538#define MCFG_ADDRESS_BANK(tag) \
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546561   MCFG_WD_FDC_INTRQ_CALLBACK(WRITELINE(gimix_state,fdc_irq_w))
547562   MCFG_WD_FDC_DRQ_CALLBACK(WRITELINE(gimix_state,fdc_drq_w))
548563   MCFG_WD_FDC_FORCE_READY
549   MCFG_FLOPPY_DRIVE_ADD("fdc:0", gimix_floppies, "525dd", gimix_state::floppy_formats)
550   MCFG_FLOPPY_DRIVE_ADD("fdc:1", gimix_floppies, "525dd", gimix_state::floppy_formats)
564   MCFG_FLOPPY_DRIVE_ADD("fdc:0", gimix_floppies, "525hd", gimix_state::floppy_formats)
565   MCFG_FLOPPY_DRIVE_ADD("fdc:1", gimix_floppies, "525hd", gimix_state::floppy_formats)
551566
552567   /* parallel ports */
553568   MCFG_DEVICE_ADD("pia1",PIA6821,XTAL_2MHz)
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561576   MCFG_DEVICE_ADD("acia1",ACIA6850,XTAL_2MHz)
562577   MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("serial1",rs232_port_device,write_txd))
563578   MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("serial1",rs232_port_device,write_rts))
579
564580   MCFG_DEVICE_ADD("acia2",ACIA6850,XTAL_2MHz)
565581   MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("serial2",rs232_port_device,write_txd))
566582   MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("serial2",rs232_port_device,write_rts))
583
567584   MCFG_DEVICE_ADD("acia3",ACIA6850,XTAL_2MHz)
568585   MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("serial3",rs232_port_device,write_txd))
569586   MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("serial3",rs232_port_device,write_rts))
587
570588   MCFG_DEVICE_ADD("acia4",ACIA6850,XTAL_2MHz)
571589   MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("serial4",rs232_port_device,write_txd))
572590   MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("serial4",rs232_port_device,write_rts))
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613631   MCFG_RAM_DEFAULT_SIZE("128K")
614632   MCFG_RAM_EXTRA_OPTIONS("56K,256K,512K")
615633
634   // uncomment this timer to use a hack that generates a regular IRQ, this will get OS-9 to boot
635   // for some unknown reason, OS-9 does not touch the 6840, and only clears/disables IRQs on the RTC
636   //MCFG_TIMER_DRIVER_ADD_PERIODIC("test_timer",gimix_state,test_timer_w,attotime::from_msec(100))
616637MACHINE_CONFIG_END
617638
618639ROM_START( gimix )
619640   ROM_REGION( 0x10000, "roms", 0)
620
621   /* CPU board U4: gimixf8.bin  - checksum 68DB - 2716 - GMXBUG09 V2.1 | (c)1981 GIMIX | $F800 I2716 */
641/* CPU board U4: gimixf8.bin  - checksum 68DB - 2716 - GMXBUG09 V2.1 | (c)1981 GIMIX | $F800 I2716 */
622642      ROM_LOAD( "gimixf8.u4",  0x000000, 0x000800, CRC(7d60f838) SHA1(eb7546e8bbf50d33e181f3e86c3e4c5c9032cab2) )
623643/* CPU board U5: gimixv14.bin - checksum 97E2 - 2716 - GIMIX 6809 | AUTOBOOT | V1.4 I2716 */
624644      ROM_LOAD( "gimixv14.u5", 0x000800, 0x000800, CRC(f795b8b9) SHA1(eda2de51cc298d94b36605437d900ce971b3b276) )

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