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https://github.com/holub/mame
synced 2025-04-23 00:39:36 +03:00
(MESS) c8050: Floppy WIP. (nw)
This commit is contained in:
Curt Coder
parent
a9095f0490
commit
e2f9eb08bf
@ -626,24 +626,24 @@ c2040_device::c2040_device(const machine_config &mconfig, device_type type, cons
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{
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}
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c2040_device::c2040_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
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: device_t(mconfig, C2040, "C2040", tag, owner, clock, "c2040", __FILE__),
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device_ieee488_interface(mconfig, *this),
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m_maincpu(*this, M6502_TAG),
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m_fdccpu(*this, M6504_TAG),
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m_riot0(*this, M6532_0_TAG),
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m_riot1(*this, M6532_1_TAG),
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m_miot(*this, M6530_TAG),
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m_via(*this, M6522_TAG),
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m_floppy0(*this, FDC_TAG":0:525ssqd"),
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m_floppy1(*this, FDC_TAG":1:525ssqd"),
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m_fdc(*this, FDC_TAG),
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m_gcr(*this, "gcr"),
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m_address(*this, "ADDRESS"),
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m_rfdo(1),
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m_daco(1),
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m_atna(1),
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m_miot_irq(CLEAR_LINE)
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c2040_device::c2040_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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device_t(mconfig, C2040, "C2040", tag, owner, clock, "c2040", __FILE__),
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device_ieee488_interface(mconfig, *this),
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m_maincpu(*this, M6502_TAG),
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m_fdccpu(*this, M6504_TAG),
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m_riot0(*this, M6532_0_TAG),
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m_riot1(*this, M6532_1_TAG),
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m_miot(*this, M6530_TAG),
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m_via(*this, M6522_TAG),
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m_floppy0(*this, FDC_TAG":0:525ssqd"),
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m_floppy1(*this, FDC_TAG":1:525ssqd"),
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m_fdc(*this, FDC_TAG),
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m_gcr(*this, "gcr"),
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m_address(*this, "ADDRESS"),
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m_rfdo(1),
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m_daco(1),
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m_atna(1),
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m_miot_irq(CLEAR_LINE)
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{
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}
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@ -19,12 +19,6 @@
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#include "c2040fdc.h"
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#include "cpu/m6502/m6502.h"
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#include "cpu/m6502/m6504.h"
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#include "imagedev/floppy.h"
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#include "formats/d64_dsk.h"
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#include "formats/g64_dsk.h"
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#include "formats/d67_dsk.h"
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#include "formats/d80_dsk.h"
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#include "formats/d82_dsk.h"
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#include "machine/6522via.h"
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#include "machine/6532riot.h"
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#include "machine/mos6530.h"
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@ -82,7 +76,6 @@ protected:
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};
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inline void update_ieee_signals();
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inline void update_gcr_data();
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required_device<m6502_device> m_maincpu;
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required_device<m6504_device> m_fdccpu;
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@ -119,7 +119,7 @@ c2040_fdc_t::c2040_fdc_t(const machine_config &mconfig, const char *tag, device_
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}
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c8050_fdc_t::c8050_fdc_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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c2040_fdc_t(mconfig, C2040_FDC, "C2040 FDC", tag, owner, clock, "c2040fdc", __FILE__) { }
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c2040_fdc_t(mconfig, C8050_FDC, "C8050 FDC", tag, owner, clock, "c8050fdc", __FILE__) { }
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@ -567,26 +567,6 @@ WRITE_LINE_MEMBER( c2040_fdc_t::mtr1_w )
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}
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}
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WRITE_LINE_MEMBER( c2040_fdc_t::odd_hd_w )
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{
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if (m_odd_hd != state)
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{
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live_sync();
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m_odd_hd = cur_live.odd_hd = state;
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if (LOG) logerror("%s ODD HD %u\n", machine().time().as_string(), state);
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m_floppy0->ss_w(!state);
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if (m_floppy1) m_floppy1->ss_w(!state);
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checkpoint();
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live_run();
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}
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}
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WRITE_LINE_MEMBER( c2040_fdc_t::pull_sync_w )
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{
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// TODO
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if (LOG) logerror("%s PULL SYNC %u\n", machine().time().as_string(), state);
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}
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void c2040_fdc_t::stp_w(floppy_image_device *floppy, int mtr, int &old_stp, int stp)
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{
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if (mtr) return;
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@ -617,36 +597,6 @@ void c2040_fdc_t::stp_w(floppy_image_device *floppy, int mtr, int &old_stp, int
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old_stp = stp;
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}
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void c8050_fdc_t::stp_w(floppy_image_device *floppy, int mtr, int &old_stp, int stp)
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{
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if (mtr) return;
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int tracks = 0;
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switch (old_stp)
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{
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case 0: if (stp == 1) tracks++; else if (stp == 2) tracks--; break;
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case 1: if (stp == 3) tracks++; else if (stp == 0) tracks--; break;
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case 2: if (stp == 0) tracks++; else if (stp == 3) tracks--; break;
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case 3: if (stp == 2) tracks++; else if (stp == 1) tracks--; break;
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}
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if (tracks == -1)
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{
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floppy->dir_w(1);
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floppy->stp_w(1);
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floppy->stp_w(0);
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}
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else if (tracks == 1)
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{
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floppy->dir_w(0);
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floppy->stp_w(1);
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floppy->stp_w(0);
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}
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old_stp = stp;
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}
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void c2040_fdc_t::stp0_w(int stp)
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{
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if (m_stp0 != stp)
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@ -685,3 +635,152 @@ void c2040_fdc_t::set_floppy(floppy_image_device *floppy0, floppy_image_device *
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m_floppy0 = floppy0;
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m_floppy1 = floppy1;
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}
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void c8050_fdc_t::live_start()
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{
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cur_live.tm = machine().time();
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cur_live.state = RUNNING;
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cur_live.next_state = -1;
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cur_live.shift_reg = 0;
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cur_live.shift_reg_write = 0;
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cur_live.cycle_counter = 0;
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cur_live.cell_counter = 0;
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cur_live.bit_counter = 0;
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cur_live.ds = m_ds;
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cur_live.drv_sel = m_drv_sel;
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cur_live.mode_sel = m_mode_sel;
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cur_live.rw_sel = m_rw_sel;
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cur_live.pi = m_pi;
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pll_reset(cur_live.tm, attotime::from_hz(0));
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checkpoint_live = cur_live;
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pll_save_checkpoint();
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live_run();
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}
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void c8050_fdc_t::pll_reset(const attotime &when, const attotime clock)
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{
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cur_pll.reset(when);
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cur_pll.set_clock(clock);
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}
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void c8050_fdc_t::pll_save_checkpoint()
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{
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checkpoint_pll = cur_pll;
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}
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void c8050_fdc_t::pll_retrieve_checkpoint()
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{
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cur_pll = checkpoint_pll;
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}
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void c8050_fdc_t::checkpoint()
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{
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checkpoint_live = cur_live;
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pll_save_checkpoint();
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}
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void c8050_fdc_t::rollback()
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{
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cur_live = checkpoint_live;
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pll_retrieve_checkpoint();
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}
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void c8050_fdc_t::live_run(const attotime &limit)
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{
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if(cur_live.state == IDLE || cur_live.next_state != -1)
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return;
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for(;;) {
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switch(cur_live.state) {
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case RUNNING: {
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bool syncpoint = false;
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if (cur_live.tm > limit)
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return;
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int bit = get_next_bit(cur_live.tm, limit);
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if(bit < 0)
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return;
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if (syncpoint) {
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commit(cur_live.tm);
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cur_live.tm += m_period;
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live_delay(RUNNING_SYNCPOINT);
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return;
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}
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cur_live.tm += m_period;
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break;
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}
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case RUNNING_SYNCPOINT: {
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m_write_ready(cur_live.ready);
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m_write_sync(cur_live.sync);
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m_write_error(cur_live.error);
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cur_live.state = RUNNING;
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checkpoint();
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break;
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}
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}
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}
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}
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int c8050_fdc_t::get_next_bit(attotime &tm, const attotime &limit)
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{
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return cur_pll.get_next_bit(tm, get_floppy(), limit);
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}
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void c8050_fdc_t::stp_w(floppy_image_device *floppy, int mtr, int &old_stp, int stp)
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{
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if (mtr) return;
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int tracks = 0;
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switch (old_stp)
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{
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case 0: if (stp == 1) tracks++; else if (stp == 2) tracks--; break;
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case 1: if (stp == 3) tracks++; else if (stp == 0) tracks--; break;
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case 2: if (stp == 0) tracks++; else if (stp == 3) tracks--; break;
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case 3: if (stp == 2) tracks++; else if (stp == 1) tracks--; break;
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}
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if (tracks == -1)
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{
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floppy->dir_w(1);
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floppy->stp_w(1);
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floppy->stp_w(0);
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}
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else if (tracks == 1)
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{
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floppy->dir_w(0);
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floppy->stp_w(1);
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floppy->stp_w(0);
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}
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old_stp = stp;
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}
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WRITE_LINE_MEMBER( c8050_fdc_t::odd_hd_w )
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{
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if (m_odd_hd != state)
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{
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live_sync();
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m_odd_hd = cur_live.odd_hd = state;
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if (LOG) logerror("%s ODD HD %u\n", machine().time().as_string(), state);
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m_floppy0->ss_w(!state);
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if (m_floppy1) m_floppy1->ss_w(!state);
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checkpoint();
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live_run();
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}
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}
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WRITE_LINE_MEMBER( c8050_fdc_t::pull_sync_w )
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{
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// TODO
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if (LOG) logerror("%s PULL SYNC %u\n", machine().time().as_string(), state);
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}
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@ -15,10 +15,13 @@
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#define __C2040_FLOPPY__
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#include "emu.h"
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#include "imagedev/floppy.h"
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#include "formats/d64_dsk.h"
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#include "formats/d67_dsk.h"
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#include "formats/g64_dsk.h"
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#include "formats/d80_dsk.h"
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#include "formats/d82_dsk.h"
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#include "imagedev/floppy.h"
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#include "machine/fdc_pll.h"
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@ -47,8 +50,8 @@ class c2040_fdc_t : public device_t
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{
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public:
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// construction/destruction
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c2040_fdc_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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c2040_fdc_t(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
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c2040_fdc_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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template<class _Object> static devcb_base &set_sync_wr_callback(device_t &device, _Object object) { return downcast<c2040_fdc_t &>(device).m_write_sync.set_callback(object); }
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template<class _Object> static devcb_base &set_ready_wr_callback(device_t &device, _Object object) { return downcast<c2040_fdc_t &>(device).m_write_ready.set_callback(object); }
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@ -62,8 +65,6 @@ public:
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DECLARE_WRITE_LINE_MEMBER( rw_sel_w );
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DECLARE_WRITE_LINE_MEMBER( mtr0_w );
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DECLARE_WRITE_LINE_MEMBER( mtr1_w );
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DECLARE_WRITE_LINE_MEMBER( odd_hd_w );
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DECLARE_WRITE_LINE_MEMBER( pull_sync_w );
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DECLARE_READ_LINE_MEMBER( wps_r ) { return checkpoint_live.drv_sel ? m_floppy1->wpt_r() : m_floppy0->wpt_r(); }
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DECLARE_READ_LINE_MEMBER( sync_r ) { return checkpoint_live.sync; }
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@ -146,9 +147,9 @@ protected:
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emu_timer *t_gen;
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floppy_image_device* get_floppy();
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void live_start();
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void checkpoint();
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void rollback();
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virtual void live_start();
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virtual void checkpoint();
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virtual void rollback();
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bool write_next_bit(bool bit, const attotime &limit);
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void start_writing(const attotime &tm);
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void commit(const attotime &tm);
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@ -156,9 +157,9 @@ protected:
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void live_delay(int state);
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void live_sync();
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void live_abort();
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void live_run(const attotime &limit = attotime::never);
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virtual void live_run(const attotime &limit = attotime::never);
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void get_next_edge(const attotime &when);
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int get_next_bit(attotime &tm, const attotime &limit);
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virtual int get_next_bit(attotime &tm, const attotime &limit);
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};
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@ -170,8 +171,22 @@ public:
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// construction/destruction
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c8050_fdc_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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DECLARE_WRITE_LINE_MEMBER( odd_hd_w );
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DECLARE_WRITE_LINE_MEMBER( pull_sync_w );
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protected:
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fdc_pll_t cur_pll, checkpoint_pll;
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void stp_w(floppy_image_device *floppy, int mtr, int &old_stp, int stp);
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virtual void live_start();
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virtual void checkpoint();
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virtual void rollback();
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void pll_reset(const attotime &when, const attotime clock);
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void pll_save_checkpoint();
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void pll_retrieve_checkpoint();
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virtual void live_run(const attotime &limit = attotime::never);
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virtual int get_next_bit(attotime &tm, const attotime &limit);
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};
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@ -179,8 +194,6 @@ protected:
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// device type definition
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extern const device_type C2040_FDC;
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extern const device_type C8050_FDC;
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//extern const device_type C8250_FDC;
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//extern const device_type SFD1001_FDC;
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