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r18610 Friday 19th October, 2012 at 19:09:38 UTC by Curt Coder
(MESS) c8280: Added FDC. (nw)
[src/mess/machine]c8280.c c8280.h

trunk/src/mess/machine/c8280.c
r18609r18610
77
88**********************************************************************/
99
10/*
11
12   TODO:
13
14   - FDC CPU ROM is line swapped/bad dump?
15
16*/
17
1018#include "c8280.h"
1119
1220
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1927#define M6502_FDC_TAG   "9e"
2028#define M6532_0_TAG      "9f"
2129#define M6532_1_TAG      "9g"
30#define WD1797_TAG      "5e"
2231
2332
2433enum
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3948
4049
4150//-------------------------------------------------
42//  device_config_complete - perform any
43//  operations now that the configuration is
44//  complete
45//-------------------------------------------------
46
47void c8280_device::device_config_complete()
48{
49   m_shortname = "c8280";
50}
51
52
53//-------------------------------------------------
5451//  ROM( c8280 )
5552//-------------------------------------------------
5653
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7976//-------------------------------------------------
8077
8178static ADDRESS_MAP_START( c8280_main_mem, AS_PROGRAM, 8, c8280_device )
82   AM_RANGE(0x0000, 0x007f) AM_MIRROR(0x0100) AM_RAM // 6532 #1
83   AM_RANGE(0x0080, 0x00ff) AM_MIRROR(0x0100) AM_RAM // 6532 #2
84   AM_RANGE(0x0200, 0x021f) AM_MIRROR(0x0d60) AM_DEVREADWRITE_LEGACY(M6532_0_TAG, riot6532_r, riot6532_w)
85   AM_RANGE(0x0280, 0x029f) AM_MIRROR(0x0d60) AM_DEVREADWRITE_LEGACY(M6532_1_TAG, riot6532_r, riot6532_w)
86   AM_RANGE(0x1000, 0x13ff) AM_MIRROR(0x0c00) AM_RAM AM_SHARE("share1")
87   AM_RANGE(0x2000, 0x23ff) AM_MIRROR(0x0c00) AM_RAM AM_SHARE("share2")
88   AM_RANGE(0x3000, 0x33ff) AM_MIRROR(0x0c00) AM_RAM AM_SHARE("share3")
89   AM_RANGE(0x4000, 0x43ff) AM_MIRROR(0x0c00) AM_RAM AM_SHARE("share4")
79   AM_RANGE(0x0000, 0x007f) AM_MIRROR(0x100) AM_RAM // 6532 #1
80   AM_RANGE(0x0080, 0x00ff) AM_MIRROR(0x100) AM_RAM // 6532 #2
81   AM_RANGE(0x0200, 0x021f) AM_MIRROR(0xd60) AM_DEVREADWRITE_LEGACY(M6532_0_TAG, riot6532_r, riot6532_w)
82   AM_RANGE(0x0280, 0x029f) AM_MIRROR(0xd60) AM_DEVREADWRITE_LEGACY(M6532_1_TAG, riot6532_r, riot6532_w)
83   AM_RANGE(0x1000, 0x13ff) AM_MIRROR(0xc00) AM_RAM AM_SHARE("share1")
84   AM_RANGE(0x2000, 0x23ff) AM_MIRROR(0xc00) AM_RAM AM_SHARE("share2")
85   AM_RANGE(0x3000, 0x33ff) AM_MIRROR(0xc00) AM_RAM AM_SHARE("share3")
86   AM_RANGE(0x4000, 0x43ff) AM_MIRROR(0xc00) AM_RAM AM_SHARE("share4")
9087   AM_RANGE(0xc000, 0xffff) AM_ROM AM_REGION(M6502_DOS_TAG, 0)
9188ADDRESS_MAP_END
9289
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9895static ADDRESS_MAP_START( c8280_fdc_mem, AS_PROGRAM, 8, c8280_device )
9996   ADDRESS_MAP_GLOBAL_MASK(0x1fff)
10097   AM_RANGE(0x0000, 0x007f) AM_MIRROR(0x380) AM_RAM
98   AM_RANGE(0x0080, 0x0081) AM_MIRROR(0x7e) AM_DEVREADWRITE_LEGACY(WD1797_TAG, wd17xx_r, wd17xx_w)
10199   AM_RANGE(0x0400, 0x07ff) AM_RAM AM_SHARE("share1")
102100   AM_RANGE(0x0800, 0x0bff) AM_RAM AM_SHARE("share2")
103101   AM_RANGE(0x0c00, 0x0fff) AM_RAM AM_SHARE("share3")
104102   AM_RANGE(0x1000, 0x13ff) AM_RAM AM_SHARE("share4")
103   AM_RANGE(0x1400, 0x1400) AM_MIRROR(0x3ff) AM_READWRITE(fk5_r, fk5_w)
105104   AM_RANGE(0x1800, 0x1fff) AM_ROM AM_REGION(M6502_FDC_TAG, 0)
106105ADDRESS_MAP_END
107106
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300299
301300
302301//-------------------------------------------------
303//  LEGACY_FLOPPY_OPTIONS( c8280 )
302//  wd17xx_interface fdc_intf
304303//-------------------------------------------------
305304
306static LEGACY_FLOPPY_OPTIONS_START( c8280 )
307LEGACY_FLOPPY_OPTIONS_END
308
309
310//-------------------------------------------------
311//  floppy_interface c8280_floppy_interface
312//-------------------------------------------------
313
314305static const floppy_interface c8280_floppy_interface =
315306{
316307   DEVCB_NULL,
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319310   DEVCB_NULL,
320311   DEVCB_NULL,
321312   FLOPPY_STANDARD_8_DSDD,
322   LEGACY_FLOPPY_OPTIONS_NAME(c8280),
313   LEGACY_FLOPPY_OPTIONS_NAME(default),
323314   "floppy_8",
324315   NULL
325316};
326317
318static struct wd17xx_interface fdc_intf =
319{
320   DEVCB_NULL,
321   DEVCB_CPU_INPUT_LINE(M6502_FDC_TAG, M6502_IRQ_LINE),
322   DEVCB_CPU_INPUT_LINE(M6502_FDC_TAG, M6502_SET_OVERFLOW),
323   { FLOPPY_0, FLOPPY_1, NULL, NULL }
324};
327325
326
328327//-------------------------------------------------
329328//  MACHINE_CONFIG_FRAGMENT( c8280 )
330329//-------------------------------------------------
331330
332331static MACHINE_CONFIG_FRAGMENT( c8280 )
333   MCFG_CPU_ADD(M6502_DOS_TAG, M6502, 1000000)
332   MCFG_CPU_ADD(M6502_DOS_TAG, M6502, XTAL_12MHz/8)
334333   MCFG_CPU_PROGRAM_MAP(c8280_main_mem)
335334
336   MCFG_RIOT6532_ADD(M6532_0_TAG, 1000000, riot0_intf)
337   MCFG_RIOT6532_ADD(M6532_1_TAG, 1000000, riot1_intf)
335   MCFG_RIOT6532_ADD(M6532_0_TAG, XTAL_12MHz/8, riot0_intf)
336   MCFG_RIOT6532_ADD(M6532_1_TAG, XTAL_12MHz/8, riot1_intf)
338337
339   MCFG_CPU_ADD(M6502_FDC_TAG, M6502, 1000000)
338   MCFG_CPU_ADD(M6502_FDC_TAG, M6502, XTAL_12MHz/8)
340339   MCFG_CPU_PROGRAM_MAP(c8280_fdc_mem)
341340
341   MCFG_FD1797_ADD(WD1797_TAG, fdc_intf)
342
342343   MCFG_LEGACY_FLOPPY_2_DRIVES_ADD(c8280_floppy_interface)
343344MACHINE_CONFIG_END
344345
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389390     m_fdccpu(*this, M6502_FDC_TAG),
390391     m_riot0(*this, M6532_0_TAG),
391392     m_riot1(*this, M6532_1_TAG),
393     m_fdc(*this, WD1797_TAG),
392394     m_image0(*this, FLOPPY_0),
393395     m_image1(*this, FLOPPY_1),
394396     m_rfdo(1),
r18609r18610
404406
405407void c8280_device::device_start()
406408{
409   // state saving
410   save_item(NAME(m_rfdo));
411   save_item(NAME(m_daco));
412   save_item(NAME(m_atna));   
413   save_item(NAME(m_fk5));
407414}
408415
409416
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413420
414421void c8280_device::device_reset()
415422{
416}
423   m_maincpu->reset();
417424
425   // toggle M6502 SO
426   m_maincpu->set_input_line(M6502_SET_OVERFLOW, ASSERT_LINE);
427   m_maincpu->set_input_line(M6502_SET_OVERFLOW, CLEAR_LINE);
418428
419//-------------------------------------------------
420//  device_timer - handler timer events
421//-------------------------------------------------
429   m_fdccpu->reset();
422430
423void c8280_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
424{
431   m_riot0->reset();
432   m_riot1->reset();
433
434   wd17xx_mr_w(m_fdc, 1);
435   wd17xx_mr_w(m_fdc, 0);
436
437   m_fk5 = 0;
438   wd17xx_dden_w(m_fdc, 0);
439   floppy_mon_w(m_image0, 1);
440   floppy_mon_w(m_image1, 1);
425441}
426442
427443
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449465      device_reset();
450466   }
451467}
468
469READ8_MEMBER( c8280_device::fk5_r )
470{
471   /*
472   
473       bit     description
474   
475       0       DS1
476       1       DS2
477       2       _DDEN
478       3       DCHG
479       4       TSID
480       5       MOTOR ENABLE
481       6       0
482       7       0
483   
484   */
485
486   UINT8 data = m_fk5;
487
488   if (BIT(m_fk5, 0))
489   {
490      data |= floppy_dskchg_r(m_image0) << 3;
491      data |= floppy_twosid_r(m_image0) << 4;
492   }
493   else if (BIT(m_fk5, 1))
494   {
495      data |= floppy_dskchg_r(m_image1) << 3;
496      data |= floppy_twosid_r(m_image1) << 4;
497   }
498
499   return data;
500}
501
502WRITE8_MEMBER( c8280_device::fk5_w )
503{
504   /*
505   
506       bit     description
507   
508       0       DS1
509       1       DS2
510       2       _DDEN
511       3       
512       4       
513       5       MOTOR ENABLE
514       6       
515       7       
516   
517   */
518
519   m_fk5 = data & 0x3f;
520
521   // drive select
522   if (BIT(data, 0)) wd17xx_set_drive(m_fdc, 0);
523   if (BIT(data, 1)) wd17xx_set_drive(m_fdc, 1);
524
525   // density select
526   wd17xx_dden_w(m_fdc, BIT(data, 2));
527
528   // motor enable
529   floppy_mon_w(m_image0, !BIT(data, 5));
530   floppy_mon_w(m_image1, !BIT(data, 5));
531}
trunk/src/mess/machine/c8280.h
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1818#include "imagedev/flopdrv.h"
1919#include "machine/6532riot.h"
2020#include "machine/ieee488.h"
21#include "machine/wd17xx.h"
2122
2223
2324
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4546   DECLARE_WRITE8_MEMBER( riot1_pa_w );
4647   DECLARE_READ8_MEMBER( riot1_pb_r );
4748   DECLARE_WRITE8_MEMBER( riot1_pb_w );
49   DECLARE_READ8_MEMBER( fk5_r );
50   DECLARE_WRITE8_MEMBER( fk5_w );
4851
4952protected:
5053    // device-level overrides
54    virtual void device_config_complete() { m_shortname = "c8280"; }
5155    virtual void device_start();
5256   virtual void device_reset();
53   virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
54    virtual void device_config_complete();
5557
5658   // device_ieee488_interface overrides
5759   void ieee488_atn(int state);
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6466   required_device<cpu_device> m_fdccpu;
6567   required_device<riot6532_device> m_riot0;
6668   required_device<riot6532_device> m_riot1;
67   required_device<device_t> m_image0;
68   required_device<device_t> m_image1;
69   required_device<fd1797_device> m_fdc;
70   required_device<legacy_floppy_image_device> m_image0;
71   required_device<legacy_floppy_image_device> m_image1;
6972
7073   // IEEE-488 bus
7174   int m_rfdo;                     // not ready for data output
7275   int m_daco;                     // not data accepted output
7376   int m_atna;                     // attention acknowledge
77
78   UINT8 m_fk5;
7479};
7580
7681

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