MAME SVN History

199869 Revisions

r30888 Sunday 8th June, 2014 at 18:38:41 UTC by Michael Zapf
New implementation of HDC9234 for modern floppy system, still WIP. (nw)

[src/emu/machine]

hdc9234.c* hdc9234.h*

trunk/src/emu/machine/hdc9234.c
r0	r30888
	1	/*
	2	HDC9234 Hard and Floppy Disk Controller
	3
	4	This controller handles MFM and FM encoded floppy disks and hard disks.
	5	The SMC9224 is used in some DEC systems. The HDC9234 is used in the
	6	Myarc HFDC card for the TI99/4A.
	7
	8	References:
	9	* SMC HDC9234 preliminary data book (1988)
	10
	11	Michael Zapf, June 2014
	12	*/
	13
	14	#include "emu.h"
	15	#include "hdc9234.h"
	16
	17	hdc9234_device::hdc9234_device(const machine_config &mconfig, const char tag, device_t owner, UINT32 clock)
	18	: device_t(mconfig, HDC9234, "SMC HDC9234 Universal Disk Controller", tag, owner, clock, "hdc9234", __FILE__),
	19	m_out_intrq(*this),
	20	m_out_dip(*this),
	21	m_out_auxbus(*this),
	22	m_in_auxbus(*this),
	23	m_in_dma(*this),
	24	m_out_dma(*this)
	25	{
	26	}
	27
	28	/*
	29	Read a byte of data from the controller
	30	The address (offset) encodes the C/D* line (command and /data)
	31	*/
	32	READ8_MEMBER( hdc9234_device::read )
	33	{
	34	logerror("%s: Read access to %04x\n", tag(), offset & 0xffff);
	35	return 0;
	36	}
	37
	38	/*
	39	Write a byte to the controller
	40	The address (offset) encodes the C/D* line (command and /data)
	41	*/
	42	WRITE8_MEMBER( hdc9234_device::write )
	43	{
	44	logerror("%s: Write access to %04x: %d\n", tag(), offset & 0xffff, data);
	45	}
	46
	47	void hdc9234_device::device_start()
	48	{
	49	logerror("%s: start\n", tag());
	50	m_out_intrq.resolve_safe();
	51	m_out_dip.resolve_safe();
	52	m_out_auxbus.resolve_safe();
	53	m_in_auxbus.resolve_safe(0);
	54	m_out_dma.resolve_safe();
	55	m_in_dma.resolve_safe(0);
	56
	57	// allocate timers
	58	}
	59
	60	void hdc9234_device::device_reset()
	61	{
	62	logerror("%s: reset\n", tag());
	63	}
	64
	65	const device_type HDC9234 = &device_creator<hdc9234_device>;

Property changes on: trunk/src/emu/machine/hdc9234.c
Added: svn:mime-type + text/plain Added: svn:eol-style + native

trunk/src/emu/machine/hdc9234.h
r0	r30888
	1	// license:BSD-3-Clause
	2	// copyright-holders:Michael Zapf
	3	/*
	4	HDC9234 Hard and Floppy Disk Controller
	5	For details see hdc9234.c
	6	*/
	7	#ifndef __HDC9234_H__
	8	#define __HDC9234_H__
	9
	10	#include "emu.h"
	11
	12	extern const device_type HDC9234;
	13
	14	//===================================================================
	15
	16	/* Interrupt line. To be connected with the controller PCB. */
	17	#define MCFG_HDC9234_INTRQ_CALLBACK(_write) \
	18	devcb = &hdc9234_device::set_intrq_wr_callback(*device, DEVCB_##_write);
	19
	20	/* DMA in progress line. To be connected with the controller PCB. */
	21	#define MCFG_HDC9234_DIP_CALLBACK(_write) \
	22	devcb = &hdc9234_device::set_dip_wr_callback(*device, DEVCB_##_write);
	23
	24	/* Auxiliary Bus. These 8 lines need to be connected to external latches
	25	and to a counter circuitry which works together with the external RAM.
	26	We use the S0/S1 lines as address lines. */
	27	#define MCFG_HDC9234_AUXBUS_OUT_CALLBACK(_write) \
	28	devcb = &hdc9234_device::set_auxbus_wr_callback(*device, DEVCB_##_write);
	29
	30	/* Auxiliary Bus. This is only used for S0=S1=0. */
	31	#define MCFG_HDC9234_AUXBUS_IN_CALLBACK(_read) \
	32	devcb = &hdc9234_device::set_auxbus_rd_callback(*device, DEVCB_##_read);
	33
	34	/* Callback to read the contents of the external RAM via the data bus.
	35	Note that the address must be set and automatically increased
	36	by external circuitry. */
	37	#define MCFG_HDC9234_DMA_IN_CALLBACK(_read) \
	38	devcb = &hdc9234_device::set_dma_rd_callback(*device, DEVCB_##_read);
	39
	40	/* Callback to write the contents of the external RAM via the data bus.
	41	Note that the address must be set and automatically increased
	42	by external circuitry. */
	43	#define MCFG_HDC9234_DMA_OUT_CALLBACK(_write) \
	44	devcb = &hdc9234_device::set_dma_wr_callback(*device, DEVCB_##_write);
	45
	46	//===================================================================
	47
	48	class hdc9234_device : public device_t
	49	{
	50	public:
	51	hdc9234_device(const machine_config &mconfig, const char tag, device_t owner, UINT32 clock);
	52
	53	// Accesors from the CPU side
	54	DECLARE_READ8_MEMBER( read );
	55	DECLARE_WRITE8_MEMBER( write );
	56
	57	// Callbacks
	58	template<class _Object> static devcb_base &set_intrq_wr_callback(device_t &device, _Object object) { return downcast<hdc9234_device &>(device).m_out_intrq.set_callback(object); }
	59	template<class _Object> static devcb_base &set_dip_wr_callback(device_t &device, _Object object) { return downcast<hdc9234_device &>(device).m_out_dip.set_callback(object); }
	60	template<class _Object> static devcb_base &set_auxbus_wr_callback(device_t &device, _Object object) { return downcast<hdc9234_device &>(device).m_out_auxbus.set_callback(object); }
	61	template<class _Object> static devcb_base &set_auxbus_rd_callback(device_t &device, _Object object) { return downcast<hdc9234_device &>(device).m_in_auxbus.set_callback(object); }
	62	template<class _Object> static devcb_base &set_dma_rd_callback(device_t &device, _Object object) { return downcast<hdc9234_device &>(device).m_in_dma.set_callback(object); }
	63	template<class _Object> static devcb_base &set_dma_wr_callback(device_t &device, _Object object) { return downcast<hdc9234_device &>(device).m_out_dma.set_callback(object); }
	64
	65	protected:
	66	void device_start();
	67	void device_reset();
	68
	69	private:
	70	devcb_write_line m_out_intrq; // INT line
	71	devcb_write_line m_out_dip; // DMA in progress line
	72	devcb_write8 m_out_auxbus; // AB0-7 lines (using S0,S1 as address)
	73	devcb_read8 m_in_auxbus; // AB0-7 lines (S0=S1=0)
	74	devcb_read8 m_in_dma; // DMA read access to the cache buffer
	75	devcb_write8 m_out_dma; // DMA write access to the cache buffer
	76	};
	77
	78	#endif

Property changes on: trunk/src/emu/machine/hdc9234.h
Added: svn:mime-type + text/plain Added: svn:eol-style + native

199869 Revisions