mirror of
https://github.com/holub/mame
synced 2025-04-21 07:52:35 +03:00
New device: Western Digital WD1010-05
This commit is contained in:
Dirk Best
parent
465d97346a
commit
093d7cbf18
@ -2912,6 +2912,18 @@ if (MACHINES["WD_FDC"]~=null) then
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}
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end
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---------------------------------------------------
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--
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--@src/devices/machine/wd1010.h,MACHINES["WD1010"] = true
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---------------------------------------------------
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if (MACHINES["WD1010"]~=null) then
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files {
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MAME_DIR .. "src/devices/machine/wd1010.cpp",
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MAME_DIR .. "src/devices/machine/wd1010.h",
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}
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end
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---------------------------------------------------
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--
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--@src/devices/machine/wd11c00_17.h,MACHINES["WD11C00_17"] = true
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@ -606,6 +606,7 @@ MACHINES["UPD765"] = true
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MACHINES["FDC_PLL"] = true
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MACHINES["V3021"] = true
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MACHINES["WD_FDC"] = true
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--MACHINES["WD1010"] = true
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MACHINES["WD11C00_17"] = true
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MACHINES["WD2010"] = true
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MACHINES["WD33C9X"] = true
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@ -622,6 +622,7 @@ MACHINES["UPD765"] = true
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MACHINES["FDC_PLL"] = true
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MACHINES["V3021"] = true
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MACHINES["WD_FDC"] = true
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MACHINES["WD1010"] = true
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MACHINES["WD11C00_17"] = true
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MACHINES["WD2010"] = true
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MACHINES["WD33C9X"] = true
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583
src/devices/machine/wd1010.cpp
Normal file
583
src/devices/machine/wd1010.cpp
Normal file
@ -0,0 +1,583 @@
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// license:GPL-2.0+
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// copyright-holders:Dirk Best
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/***************************************************************************
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Western Digital WD1010-05 Winchester Disk Controller
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***************************************************************************/
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#include "emu.h"
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#include "wd1010.h"
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//#define LOG_GENERAL (1U << 0)
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#define LOG_CMD (1U << 1)
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#define LOG_INT (1U << 2)
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#define LOG_SEEK (1U << 3)
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#define LOG_REGS (1U << 4)
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#define LOG_DATA (1U << 5)
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//#define VERBOSE (LOG_CMD | LOG_INT | LOG_SEEK | LOG_REGS | LOG_DATA)
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//#define LOG_OUTPUT_STREAM std::cout
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#include "logmacro.h"
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#define LOGCMD(...) LOGMASKED(LOG_CMD, __VA_ARGS__)
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#define LOGINT(...) LOGMASKED(LOG_INT, __VA_ARGS__)
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#define LOGSEEK(...) LOGMASKED(LOG_SEEK, __VA_ARGS__)
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#define LOGREGS(...) LOGMASKED(LOG_REGS, __VA_ARGS__)
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#define LOGDATA(...) LOGMASKED(LOG_DATA, __VA_ARGS__)
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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DEFINE_DEVICE_TYPE(WD1010, wd1010_device, "wd1010", "Western Digital WD1010-05")
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// wd1010_device - constructor
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//-------------------------------------------------
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wd1010_device::wd1010_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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device_t(mconfig, WD1010, tag, owner, clock),
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m_out_intrq_cb(*this),
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m_out_bcr_cb(*this),
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m_in_data_cb(*this),
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m_out_data_cb(*this),
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m_intrq(0),
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m_brdy(0),
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m_stepping_rate(0x00),
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m_command(0x00),
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m_error(0x00),
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m_precomp(0x00),
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m_sector_count(0x00),
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m_sector_number(0x00),
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m_cylinder(0x0000),
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m_sdh(0x00),
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m_status(0x00)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void wd1010_device::device_start()
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{
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// get connected drives
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for (int i = 0; i < 4; i++)
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{
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char name[2];
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name[0] = '0' + i;
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name[1] = 0;
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m_drives[i].drive = subdevice<harddisk_image_device>(name);
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m_drives[i].head = 0;
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m_drives[i].cylinder = 0;
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m_drives[i].sector = 0;
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}
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// resolve callbacks
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m_out_intrq_cb.resolve_safe();
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m_out_bcr_cb.resolve_safe();
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m_in_data_cb.resolve_safe(0);
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m_out_data_cb.resolve_safe();
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// allocate timer
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m_seek_timer = timer_alloc(TIMER_SEEK);
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m_data_timer = timer_alloc(TIMER_DATA);
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// register for save states
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save_item(NAME(m_intrq));
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save_item(NAME(m_brdy));
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save_item(NAME(m_stepping_rate));
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save_item(NAME(m_command));
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save_item(NAME(m_error));
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save_item(NAME(m_precomp));
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save_item(NAME(m_sector_count));
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save_item(NAME(m_sector_number));
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save_item(NAME(m_cylinder));
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save_item(NAME(m_sdh));
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save_item(NAME(m_status));
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void wd1010_device::device_reset()
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{
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}
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//-------------------------------------------------
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// device_timer - device-specific timer
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//-------------------------------------------------
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void wd1010_device::device_timer(emu_timer &timer, device_timer_id tid, int param, void *ptr)
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{
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switch (tid)
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{
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case TIMER_SEEK:
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if ((m_command >> 4) != CMD_SCAN_ID)
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{
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LOGSEEK("Seek complete\n");
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m_drives[drive()].cylinder = param;
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m_status |= STATUS_SC;
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}
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switch (m_command >> 4)
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{
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case CMD_RESTORE:
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cmd_restore();
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break;
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case CMD_SEEK:
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cmd_seek();
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break;
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case CMD_READ_SECTOR:
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cmd_read_sector();
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break;
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case CMD_WRITE_SECTOR:
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case CMD_WRITE_FORMAT:
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cmd_write_sector();
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break;
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case CMD_SCAN_ID:
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cmd_scan_id();
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break;
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}
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break;
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case TIMER_DATA:
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// check if data is ready or continue waiting
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if (m_brdy)
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cmd_write_sector();
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else
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m_data_timer->adjust(attotime::from_usec(35));
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break;
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}
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}
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//-------------------------------------------------
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// set_error - set error and adjust status
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//-------------------------------------------------
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void wd1010_device::set_error(int error)
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{
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if (error)
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{
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m_error |= error;
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m_status |= STATUS_ERR;
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}
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else
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{
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m_error = 0;
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m_status &= ~STATUS_ERR;
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}
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}
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//-------------------------------------------------
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// set_intrq - set interrupt status
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//-------------------------------------------------
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void wd1010_device::set_intrq(int state)
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{
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if (m_intrq == 0 && state == 1)
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{
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LOGINT("INT 1\n");
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m_intrq = 1;
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m_out_intrq_cb(1);
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}
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else if (m_intrq == 1 && state == 0)
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{
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LOGINT("INT 0\n");
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m_intrq = 0;
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m_out_intrq_cb(0);
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}
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}
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//-------------------------------------------------
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// get_stepping_rate - calculate stepping rate
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//-------------------------------------------------
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attotime wd1010_device::get_stepping_rate()
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{
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if (m_stepping_rate)
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return attotime::from_usec(500 * m_stepping_rate);
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else
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return attotime::from_usec(35);
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}
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//-------------------------------------------------
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// start_command - executed at the start of every command
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//-------------------------------------------------
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void wd1010_device::start_command()
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{
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// now busy and command in progress, clear error
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m_status |= STATUS_BSY;
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m_status |= STATUS_CIP;
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set_error(0);
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switch (m_command >> 4)
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{
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case CMD_RESTORE:
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m_stepping_rate = m_command & 0x0f;
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LOGCMD("RESTORE\n");
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break;
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case CMD_READ_SECTOR:
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LOGCMD("READ SECTOR\n");
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break;
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case CMD_WRITE_SECTOR:
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LOGCMD("WRITE SECTOR\n");
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break;
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case CMD_SCAN_ID:
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LOGCMD("SCAN ID\n");
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break;
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case CMD_WRITE_FORMAT:
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LOGCMD("WRITE FORMAT ID\n");
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break;
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case CMD_SEEK:
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m_stepping_rate = m_command & 0x0f;
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LOGCMD("SEEK\n");
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break;
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}
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}
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//-------------------------------------------------
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// end_command - executed at end of every command
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//-------------------------------------------------
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void wd1010_device::end_command()
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{
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m_out_bcr_cb(1);
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m_out_bcr_cb(0);
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m_status &= ~(STATUS_BSY | STATUS_CIP);
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set_intrq(1);
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}
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//-------------------------------------------------
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// get_lbasector - translate to lba
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//-------------------------------------------------
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int wd1010_device::get_lbasector()
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{
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hard_disk_file *file = m_drives[drive()].drive->get_hard_disk_file();
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hard_disk_info *info = hard_disk_get_info(file);
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int lbasector;
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lbasector = m_cylinder;
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lbasector *= info->heads;
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lbasector += head();
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lbasector *= info->sectors;
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lbasector += m_sector_number;
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return lbasector;
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}
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//**************************************************************************
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// INTERFACE
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//**************************************************************************
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WRITE_LINE_MEMBER( wd1010_device::drdy_w )
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{
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if (state)
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m_status |= STATUS_RDY;
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else
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m_status &= ~STATUS_RDY;
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}
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WRITE_LINE_MEMBER( wd1010_device::brdy_w )
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{
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m_brdy = state;
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}
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READ8_MEMBER( wd1010_device::read )
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{
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// if the controller is busy all reads return the status register
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if (m_status & STATUS_BSY)
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{
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LOG("Read while busy, return STATUS: %02x\n", m_status);
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return m_status;
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}
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switch (offset & 0x07)
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{
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case 0:
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LOGREGS("RD INVALID\n");
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return 0;
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case 1:
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LOGREGS("RD ERROR: %02x\n", m_error);
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return m_error;
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case 2:
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LOGREGS("RD SECTOR COUNT: %02x\n", m_sector_count);
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return m_sector_count;
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case 3:
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LOGREGS("RD SECTOR NUMBER: %02x\n", m_sector_number);
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return m_sector_number;
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case 4:
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LOGREGS("RD CYLINDER L: %02x\n", m_cylinder & 0xff);
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return m_cylinder & 0xff;
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case 5:
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LOGREGS("RD CYLINDER H: %02x\n", m_cylinder >> 8);
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return m_cylinder >> 8;
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case 6:
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LOGREGS("RD SDH: %02x\n", m_sdh);
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return m_sdh;
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case 7:
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LOGREGS("RD STATUS: %02x\n", m_status);
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// reading the status register clears the interrupt
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set_intrq(0);
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return m_status;
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}
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// should never get here
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return 0xff;
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}
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WRITE8_MEMBER( wd1010_device::write )
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{
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switch (offset & 0x07)
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{
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case 0:
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LOGREGS("WR INVALID: %02x\n", data);
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break;
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case 1:
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LOGREGS("WR PRECOMP: %02x\n", data);
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m_precomp = data;
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break;
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case 2:
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LOGREGS("WR SECTOR COUNT: %02x\n", data);
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m_sector_count = data;
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break;
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case 3:
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LOGREGS("WR SECTOR NUMBER: %02x\n", data);
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m_sector_number = data;
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break;
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case 4:
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LOGREGS("WR CYLINDER L: %02x\n", data);
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m_cylinder = (m_cylinder & 0xff00) | (data << 0);
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break;
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case 5:
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LOGREGS("WR CYLINDER H: %02x\n", data);
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m_cylinder = (m_cylinder & 0x00ff) | (data << 8);
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break;
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case 6:
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LOGREGS("WR SDH: %02x\n", data);
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m_sdh = data;
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break;
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case 7:
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// writes to the command register are ignored when a command is in progress
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if (m_status & STATUS_CIP)
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return;
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// writing the command register clears the interrupt
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set_intrq(0);
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// check drive status
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if (!(m_status & STATUS_RDY))
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{
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// selected drive not ready
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LOG("--> Drive not ready, aborting\n");
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set_error(ERR_AC);
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end_command();
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}
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else
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{
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m_command = data;
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start_command();
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// all other command imply a seek
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if ((m_command >> 4) != CMD_SCAN_ID)
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m_status &= ~STATUS_SC;
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int amount = 0;
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int target = 0;
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switch (m_command >> 4)
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{
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case CMD_RESTORE:
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amount = m_drives[drive()].cylinder;
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target = 0;
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break;
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case CMD_SEEK:
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case CMD_READ_SECTOR:
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case CMD_WRITE_SECTOR:
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case CMD_WRITE_FORMAT:
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amount = abs(m_drives[drive()].cylinder - m_cylinder);
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target = m_cylinder;
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break;
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}
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if ((m_command >> 4) != CMD_SCAN_ID)
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LOGSEEK("Seeking %d cylinders to %d\n", amount, target);
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m_seek_timer->adjust(get_stepping_rate() * amount, target);
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}
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||||
break;
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}
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}
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//**************************************************************************
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// IMPLEMENTATION
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//**************************************************************************
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void wd1010_device::cmd_restore()
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{
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LOGCMD("--> RESTORE done\n");
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end_command();
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}
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void wd1010_device::cmd_read_sector()
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{
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hard_disk_file *file = m_drives[drive()].drive->get_hard_disk_file();
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hard_disk_info *info = hard_disk_get_info(file);
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m_out_bcr_cb(1);
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m_out_bcr_cb(0);
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// verify that we can read
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if (head() > info->heads)
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{
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// out of range
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LOG("--> Head out of range, aborting\n");
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set_error(ERR_AC);
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||||
end_command();
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||||
}
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else
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{
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uint8_t buffer[512];
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||||
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while (m_sector_count > 0)
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||||
{
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LOGDATA("--> Transferring sector to buffer (lba = %08x)\n", get_lbasector());
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||||
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||||
hard_disk_read(file, get_lbasector(), buffer);
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||||
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||||
for (int i = 0; i < 512; i++)
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||||
m_out_data_cb(buffer[i]);
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||||
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||||
m_out_bcr_cb(1);
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||||
m_out_bcr_cb(0);
|
||||
|
||||
// save last read head and sector number
|
||||
m_drives[drive()].head = head();
|
||||
m_drives[drive()].sector = m_sector_number;
|
||||
|
||||
if (BIT(m_command, 2))
|
||||
{
|
||||
m_sector_number++;
|
||||
m_sector_count--;
|
||||
}
|
||||
else
|
||||
break;
|
||||
}
|
||||
|
||||
end_command();
|
||||
}
|
||||
}
|
||||
|
||||
void wd1010_device::cmd_write_sector()
|
||||
{
|
||||
if (!(m_status & STATUS_DRQ))
|
||||
{
|
||||
LOGDATA("Setting DATA REQUEST\n");
|
||||
m_status |= STATUS_DRQ;
|
||||
m_data_timer->adjust(attotime::from_usec(35));
|
||||
return;
|
||||
}
|
||||
|
||||
if (m_brdy == 0)
|
||||
{
|
||||
m_data_timer->adjust(attotime::from_usec(35));
|
||||
return;
|
||||
}
|
||||
|
||||
LOGDATA("Clearing DATA REQUEST\n");
|
||||
m_status &= ~STATUS_DRQ;
|
||||
|
||||
hard_disk_file *file = m_drives[drive()].drive->get_hard_disk_file();
|
||||
uint8_t buffer[512];
|
||||
|
||||
while (m_sector_count > 0)
|
||||
{
|
||||
if ((m_command >> 4) == CMD_WRITE_FORMAT)
|
||||
{
|
||||
// we ignore the format specification and fill everything with 0xe5
|
||||
std::fill(std::begin(buffer), std::end(buffer), 0xe5);
|
||||
}
|
||||
else
|
||||
{
|
||||
// get data for sector from buffer chip
|
||||
for (int i = 0; i < 512; i++)
|
||||
buffer[i] = m_in_data_cb();
|
||||
}
|
||||
|
||||
hard_disk_write(file, get_lbasector(), buffer);
|
||||
|
||||
// save last read head and sector number
|
||||
m_drives[drive()].head = head();
|
||||
m_drives[drive()].sector = m_sector_number;
|
||||
|
||||
if (BIT(m_command, 2))
|
||||
{
|
||||
m_sector_number++;
|
||||
m_sector_count--;
|
||||
}
|
||||
else
|
||||
break;
|
||||
}
|
||||
|
||||
end_command();
|
||||
}
|
||||
|
||||
void wd1010_device::cmd_scan_id()
|
||||
{
|
||||
// update head, sector size, sector number and cylinder
|
||||
m_sdh = (m_sdh & 0xf8) | (m_drives[drive()].head & 0x07);
|
||||
m_sector_number = m_drives[drive()].sector;
|
||||
m_cylinder = m_drives[drive()].cylinder;
|
||||
|
||||
end_command();
|
||||
}
|
||||
|
||||
void wd1010_device::cmd_seek()
|
||||
{
|
||||
LOGCMD("--> SEEK done\n");
|
||||
end_command();
|
||||
}
|
||||
143
src/devices/machine/wd1010.h
Normal file
143
src/devices/machine/wd1010.h
Normal file
@ -0,0 +1,143 @@
|
||||
// license:GPL-2.0+
|
||||
// copyright-holders:Dirk Best
|
||||
/***************************************************************************
|
||||
|
||||
Western Digital WD1010-05 Winchester Disk Controller
|
||||
|
||||
***************************************************************************/
|
||||
|
||||
#ifndef MAME_MACHINE_WD1010_H
|
||||
#define MAME_MACHINE_WD1010_H
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "imagedev/harddriv.h"
|
||||
|
||||
|
||||
//**************************************************************************
|
||||
// TYPE DEFINITIONS
|
||||
//**************************************************************************
|
||||
|
||||
// ======================> wd1010_device
|
||||
|
||||
class wd1010_device : public device_t
|
||||
{
|
||||
public:
|
||||
// construction/destruction
|
||||
wd1010_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
|
||||
|
||||
auto out_intrq_callback() { return m_out_intrq_cb.bind(); }
|
||||
auto out_bcr_callback() { return m_out_bcr_cb.bind(); }
|
||||
auto in_data_callback() { return m_in_data_cb.bind(); }
|
||||
auto out_data_callback() { return m_out_data_cb.bind(); }
|
||||
|
||||
DECLARE_READ8_MEMBER(read);
|
||||
DECLARE_WRITE8_MEMBER(write);
|
||||
|
||||
DECLARE_WRITE_LINE_MEMBER(drdy_w);
|
||||
DECLARE_WRITE_LINE_MEMBER(brdy_w);
|
||||
|
||||
protected:
|
||||
// device-level overrides
|
||||
virtual void device_start() override;
|
||||
virtual void device_reset() override;
|
||||
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
|
||||
|
||||
private:
|
||||
enum
|
||||
{
|
||||
STATUS_ERR = 0x01, // error
|
||||
STATUS_CIP = 0x02, // command in progress
|
||||
STATUS_RSV = 0x04, // reserved
|
||||
STATUS_DRQ = 0x08, // data request
|
||||
STATUS_SC = 0x10, // seek complete
|
||||
STATUS_WF = 0x20, // write fault
|
||||
STATUS_RDY = 0x40, // drive ready
|
||||
STATUS_BSY = 0x80 // controller busy
|
||||
};
|
||||
|
||||
enum
|
||||
{
|
||||
ERR_DM = 0x01, // data address mark not found
|
||||
ERR_TK = 0x02, // track zero error
|
||||
ERR_AC = 0x04, // aborted command
|
||||
ERR_RSV1 = 0x08, // reserved, forced to 0
|
||||
ERR_ID = 0x10, // id not found
|
||||
ERR_RSV2 = 0x20, // reserved, forced to 0
|
||||
ERR_CRC = 0x40, // crc error
|
||||
ERR_BB = 0x80 // bad block
|
||||
};
|
||||
|
||||
enum
|
||||
{
|
||||
CMD_RESTORE = 1,
|
||||
CMD_READ_SECTOR = 2,
|
||||
CMD_WRITE_SECTOR = 3,
|
||||
CMD_SCAN_ID = 4,
|
||||
CMD_WRITE_FORMAT = 5,
|
||||
CMD_SEEK = 7
|
||||
};
|
||||
|
||||
enum
|
||||
{
|
||||
TIMER_SEEK,
|
||||
TIMER_DATA
|
||||
};
|
||||
|
||||
void set_error(int error);
|
||||
void set_intrq(int state);
|
||||
attotime get_stepping_rate();
|
||||
void start_command();
|
||||
void end_command();
|
||||
int get_lbasector();
|
||||
|
||||
// extract values from sdh
|
||||
int head() { return (m_sdh >> 0) & 0x07; }
|
||||
int drive() { return (m_sdh >> 3) & 0x03; }
|
||||
int sector_size()
|
||||
{
|
||||
const int S[4] = { 256, 512, 1024, 128 };
|
||||
return S[(m_sdh >> 5) & 0x03];
|
||||
}
|
||||
|
||||
void cmd_restore();
|
||||
void cmd_read_sector();
|
||||
void cmd_write_sector();
|
||||
void cmd_scan_id();
|
||||
void cmd_seek();
|
||||
|
||||
devcb_write_line m_out_intrq_cb;
|
||||
devcb_write_line m_out_bcr_cb;
|
||||
devcb_read8 m_in_data_cb;
|
||||
devcb_write8 m_out_data_cb;
|
||||
|
||||
struct
|
||||
{
|
||||
harddisk_image_device *drive;
|
||||
uint8_t head;
|
||||
uint16_t cylinder;
|
||||
uint8_t sector;
|
||||
} m_drives[4];
|
||||
|
||||
emu_timer *m_seek_timer;
|
||||
emu_timer *m_data_timer;
|
||||
|
||||
int m_intrq;
|
||||
int m_brdy;
|
||||
uint8_t m_stepping_rate;
|
||||
uint8_t m_command;
|
||||
|
||||
// task file registers
|
||||
uint8_t m_error;
|
||||
uint8_t m_precomp;
|
||||
uint8_t m_sector_count;
|
||||
uint8_t m_sector_number;
|
||||
uint16_t m_cylinder;
|
||||
uint8_t m_sdh;
|
||||
uint8_t m_status;
|
||||
};
|
||||
|
||||
// device type definition
|
||||
DECLARE_DEVICE_TYPE(WD1010, wd1010_device)
|
||||
|
||||
#endif // MAME_MACHINE_WD1010_H
|
||||
Loading…
Reference in New Issue
Block a user