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started work on Motorola MVME-350
This commit is contained in:
Joakim Larsson Edstrom
parent
26ee73a122
commit
88a206a764
251
src/mess/drivers/mvme350.c
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251
src/mess/drivers/mvme350.c
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// license:BSD-3-Clause
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// copyright-holders:Joakim Larsson Edstrom
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/***************************************************************************
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*
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* Motorola MVME-350 6U Intelligent Tape Controller driver, initially derived
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* from hk68v10.c
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*
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* 31/08/2015
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*
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* I baught this board from http://www.retrotechnology.com without documentation.
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* It has a Motorola 68010 CPU @ 10MHz, 128 Mb RAM and two 2764 EPROMS with
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* QIC-02 tape controller firmware. The board also populates a 68230 PIT and loads
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* of descrete TTL components.
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*
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*
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* ||
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* || ||
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* ||||--||
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* ||||--||
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* || ||____________________________________________________________ ___
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* || |_| |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | |VME|
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* || | | |
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* || | |P1 |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || |_| |
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* || |___|
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* || |
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* || |
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* || |
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* || |
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* || |
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* || |
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* || |
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* || |
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* || |___
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* || _| |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | |VME|
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* || | | |
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* || | |P2 |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || | | |
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* || |_| |
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* || |___|
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* || ||------------------------------------------------------------+-+
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* ||||--||
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* ||||--||
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* ||
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*
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* History of Motorola VME division
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*---------------------------------
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* TBD
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*
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* Misc links about Motorola VME division and this board:
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*
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* Address Map
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* --------------------------------------------------------------------------
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* Local to VME Decscription
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* --------------------------------------------------------------------------
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* 0xffffff To of A24
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* 0xfc0000
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* 0x200000 (top of 2 meg RAM)
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* 0x100000 (top of 1 meg RAM)
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* Exception Vectors
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* 0x000000 (bottom of memory)
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* --------------------------------------------------------------------------
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*
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* Interrupt sources MVME
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* ----------------------------------------------------------
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* Description Device Lvl IRQ VME board
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* /Board Vector Address
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* ----------------------------------------------------------
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* On board Sources
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*
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* Off board Sources (other VME boards)
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*
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* ----------------------------------------------------------
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*
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* DMAC Channel Assignments
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* ----------------------------------------------------------
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* Channel M10 V10
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* ----------------------------------------------------------
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*
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*
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* TODO:
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* - Dump the ROMs (DONE)
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* - Setup a working address map
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* - Get documentation for VME interface
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* - Add VME bus driver
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* - Hook up a CPU board that supports boot from tape (ie MVME-162, MVME 147)
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* - Get a tape file with a bootable data on it.
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*
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****************************************************************************/
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#include "emu.h"
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#include "cpu/m68000/m68000.h"
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#define LOG(x) x
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class mvme350_state : public driver_device
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{
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public:
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mvme350_state(const machine_config &mconfig, device_type type, const char *tag) :
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driver_device (mconfig, type, tag),
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m_maincpu (*this, "maincpu")
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{
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}
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//DECLARE_READ16_MEMBER (bootvect_r);
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//DECLARE_WRITE16_MEMBER (bootvect_w);
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DECLARE_READ16_MEMBER (vme_a24_r);
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DECLARE_WRITE16_MEMBER (vme_a24_w);
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DECLARE_READ16_MEMBER (vme_a16_r);
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DECLARE_WRITE16_MEMBER (vme_a16_w);
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virtual void machine_start ();
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virtual void machine_reset ();
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protected:
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private:
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required_device<cpu_device> m_maincpu;
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// Pointer to System ROMs needed by bootvect_r and masking RAM buffer for post reset accesses
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// UINT16 *m_sysrom;
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// UINT16 m_sysram[4];
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};
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static ADDRESS_MAP_START (mvme350_mem, AS_PROGRAM, 16, mvme350_state)
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ADDRESS_MAP_UNMAP_HIGH
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//AM_RANGE (0x000000, 0x000007) AM_ROM AM_READ (bootvect_r) /* ROM mirror just durin reset */
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//AM_RANGE (0x000000, 0x000007) AM_RAM AM_WRITE (bootvect_w) /* After first write we act as RAM */
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//AM_RANGE (0x000008, 0x0fffff) AM_RAM /* 1 Mb RAM */
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AM_RANGE (0x000000, 0x01ffff) AM_ROM /* 128 Mb ROM */
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AM_RANGE (0x020000, 0x03ffff) AM_RAM /* 128 Mb RAM */
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//AM_RANGE(0x100000, 0xfeffff) AM_READWRITE(vme_a24_r, vme_a24_w) /* VMEbus Rev B addresses (24 bits) - not verified */
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//AM_RANGE(0xff0000, 0xffffff) AM_READWRITE(vme_a16_r, vme_a16_w) /* VMEbus Rev B addresses (16 bits) - not verified */
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ADDRESS_MAP_END
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/* Input ports */
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static INPUT_PORTS_START (mvme350)
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INPUT_PORTS_END
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/* Start it up */
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void mvme350_state::machine_start ()
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{
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LOG (logerror ("machine_start\n"));
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/* Setup pointer to bootvector in ROM for bootvector handler bootvect_r */
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// m_sysrom = (UINT16*)(memregion ("maincpu")->base () + 0x0fc0000);
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}
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/* Support CPU resets
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TODO: Investigate why the user need two 'softreset' commands for the below to work.
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If only one 'softreset' is given the reset PC gets the RAM content, not the intended ROM vector.
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Race conditions? Wrong call order in memory system? Debugger prefetch accesses?
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*/
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void mvme350_state::machine_reset ()
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{
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LOG (logerror ("machine_reset\n"));
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/* Reset pointer to bootvector in ROM for bootvector handler bootvect_r */
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// if (m_sysrom == &m_sysram[0]) /* Condition needed because memory map is not setup first time */
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// m_sysrom = (UINT16*)(memregion ("maincpu")->base () + 0x0fc0000);
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}
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#if 0
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/* Boot vector handler, the PCB hardwires the first 8 bytes from 0xfc0000 to 0x0 at reset*/
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READ16_MEMBER (mvme350_state::bootvect_r){
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//LOG (logerror ("bootvect_r %s\n", m_sysrom != &m_sysram[0] ? "as reset" : "as swapped"));
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return m_sysrom [offset];
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}
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WRITE16_MEMBER (mvme350_state::bootvect_w){
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LOG (logerror("bootvect_w offset %08x, mask %08x, data %04x\n", offset, mem_mask, data));
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m_sysram[offset % sizeof(m_sysram)] &= ~mem_mask;
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m_sysram[offset % sizeof(m_sysram)] |= (data & mem_mask);
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m_sysrom = &m_sysram[0]; // redirect all upcomming accesses to masking RAM until reset.
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}
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/* Dummy VME access methods until the VME bus device is ready for use */
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READ16_MEMBER (mvme350_state::vme_a24_r){
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LOG (logerror ("vme_a24_r\n"));
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return (UINT16) 0;
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}
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WRITE16_MEMBER (mvme350_state::vme_a24_w){
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LOG (logerror ("vme_a24_w\n"));
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}
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READ16_MEMBER (mvme350_state::vme_a16_r){
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LOG (logerror ("vme_16_r\n"));
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return (UINT16) 0;
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}
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WRITE16_MEMBER (mvme350_state::vme_a16_w){
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LOG (logerror ("vme_a16_w\n"));
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}
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#endif
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/*
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* Machine configuration
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*/
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static MACHINE_CONFIG_START (mvme350, mvme350_state)
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/* basic machine hardware */
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MCFG_CPU_ADD ("maincpu", M68010, XTAL_10MHz)
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MCFG_CPU_PROGRAM_MAP (mvme350_mem)
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/* Terminal Port config */
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MACHINE_CONFIG_END
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/* ROM definitions */
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ROM_START (mvme350)
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ROM_REGION (0x1000000, "maincpu", 0)
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ROM_LOAD16_BYTE ("hk68kv10U23.bin", 0xFC0001, 0x2000, CRC (632aa026) SHA1 (f2b1ed0cc38dfbeb1602c013e00757015400720d))
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ROM_LOAD16_BYTE ("hk68kv10U12.bin", 0xFC0000, 0x2000, CRC (f2d688e9) SHA1 (e68699965645f0ce53de47625163c3eb02c8b727))
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/*
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* System ROM information
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*
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* The ROMs known commands from different sources:
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*
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* TBD
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*
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*/
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ROM_END
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/* Driver */
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/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
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COMP (1985, mvme350, 0, 0, mvme350, mvme350, driver_device, 0, "Motorola", "MVME-350", MACHINE_IS_SKELETON )
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