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Joakim Larsson Edstrom
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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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* || |74F74 | xxxxx | xxxxx | 74LS245 | 74ALS645| | | |
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* || |______|________|_________|___________| ________| | | |
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* || |74F74 | xxxxx | xxxxx | 74LS245 | 74ALS645| | | |
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* || |______|________|_________|___________| ________| | | |
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* || |74LS02| 74LS08||Am25LS251| 74S38 |74LS20|Jumpers | | |
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* || |______|_______||_________|_______|______|______| | |VME|
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* || |74F04 | 74LS32||74LS374 | 74LS374 |74S244 | | | |
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* ||+---+ |______|_______||_________|___________|_________| | |P1 |
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* |||CON| |74F04 | 74LS85||74S244 | 74S240 |PAL | | | |
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* ||| | |______|_______||_________|___________|_________| | | |
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* ||| | |74LS04| | |74S244 | | | |
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* ||| | |______| | PIT |_________| | | |
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* ||| | |74LS125 | MC68230L10 |74LS145 | | | |
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* ||| | |______| __|_______________________|---------| | | |
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* ||| | |74LS74| |25LS251 | | RAM |74S244 | |_| |
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* ||+---+ ---------- |---------- | HM6264P-12 |---------| |___|
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* || | PAL | | 74245 | |______________|74S244 | |
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* || +--------- |_________| | U40 27128 |---------| |
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* || | 74F32 | | || System ROM |74LS682 | |
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* Red || +-------- | CPU || |-+-------| |
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* FAIL ||LED | 74F138| | MC68010 |+--------------+ |DIPSW__| |
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* Red || +-------- | || RAM | |74S38 | |
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* HALT ||LED | 74F32 | |__________|| HM6264P-12 | |______ | |
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* Green || +-------+ |74245 |+--------------+ |74F08 | |
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* RUN ||LED |XTAL | |__________|| U47 27128 | |______ | |___
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* ||+---+|20MHz | |74244 || System ROM | |74F00 | _| |
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* |||CON|--------+___|__________|+--------------+_|_______| | | |
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* ||| |74LS08 |74F74 |74LS148| |PAL | | PAL | | | |
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* ||| |________|________|_______| |________|_|_________| | | |
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* ||| | 74LS138|74F32 | PAL | |74F74 |Am29823 | | | |
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* ||| |________|________|_______| |________|-+---------| | |VME|
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* ||| | 74LS11 |74F04 |74LS374| |74LS374 | |74S240 | | | |
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* ||| |________|________|_______| |________|_|---------| | |P2 |
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* ||| | 74F138 |BLANK |74LS374| |74LS374 |74S240 | | | |
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* ||| |________|________|_______| +----------+---------| | | |
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* ||| | 74LS08 |74F32 |74LS11|74LS393|74LS393|resistors | | |
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* ||| |________|________|______|______ |_______|________| | | |
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* ||| |DM2585 |74F74 |DM2230| 74LS00| 74F02 |74F32 | | | |
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* ||+---+--------+--------+------+-------+---------+------| | | |
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* || |74LS74 |74F20 |74S260| 74S74 | 74F08 |74LS02| | | |
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* || +------------------------------------------+------| | | |
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* || |DM2353 |74F10 |74F32 | 74LS32| 74F08 |DM2353| |_| |
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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 (https://en.wikipedia.org/wiki/VMEbus)
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*---------------------------------
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* When Motorola released the 68000 processor 1979 the ambition of the deisgners
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* was also to standardize a versatile CPU bus to be able to build computer
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* systems without constructing PCB:s from scratch. This become VersaBus but the
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* boards was really too big and the computer world already saw the systems shrink
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* in size. Motorola's design center in Munich proposed to use the smaller and
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* already used Euroboard form factor and call it Versabus-E. This later became
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* VME which was standardized in the VITA organization 1981
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*
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* Misc links about Motorola VME division and this board:
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* http://bitsavers.trailing-edge.com/pdf/motorola/_dataBooks/1987_Microcomputer_Systems_and_Components.pdf
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*
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* Description
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* ------------
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* Streaming Tape Controller released 1984 with the following feature set
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*
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* - Double High (6U) VMEmodule
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* - QIC-02 Streaming Tape Interface
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* - Supports One 01C-02 compatible 1/4-inch Streaming Tape Drive
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* - Standard VMEbus Interface
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* - Supports 24- or 32-bit DMA Addressing/16-bit Data
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* - Generates Seven Levels of VMEbus Interrupts with Programmable Interrupt Vector
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* - 10 MHz MC68010 Microprocessor
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* - 90Kb/s Continuous Transfer Rate for QIC-02 Interface, 200Kb/s Burst rate
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* - Controls Tape Cartridges Offering 20Mb, 45Mb and 60Mb of Formatted Data Storage
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* - MC68230 PIT-based Timer
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* - 16Kb of Static RAM Provides Buffer Storage and CPU Workspace
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* - Multitasking Kernel-based Firmware Package
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* - Buffered Pipe Communication Protocol Allows Multiple Hosts to Oueue Commands Without Interlock
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* - High Level Command/Status Packets offer efficient Operating System Support
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* - Permits Chaining of Host Command
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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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* 0x000000 Up to 128Kb System ROM with RESET vector
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* 0x020000 RAM with vectors
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* 0x020500 RAM Top of stack
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* 0x040000 PIT device?
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* 0x060000 RAM?
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* 0x080000 PIT device?
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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 (STARTED)
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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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#include "machine/68230pit.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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m_pit(*this, "pit")
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{
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}
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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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required_device<pit68230_device> m_pit;
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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, 0x01ffff) AM_ROM /* 128 Mb ROM */
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AM_RANGE (0x020000, 0x03ffff) AM_RAM /* 128 Mb RAM */
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#if 1
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AM_RANGE(0x040000, 0x040035) AM_DEVREADWRITE8("pit", pit68230_device, read, write, 0x00ff) /* PIT ?*/
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AM_RANGE(0x060000, 0x06001f) AM_RAM /* Area is cleared on start */
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AM_RANGE(0x080000, 0x080035) AM_DEVREADWRITE8("pit", pit68230_device, read, write, 0x00ff) /* PIT ?*/
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#endif
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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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}
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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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}
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#if 0
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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_t) 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_t) 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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/* PIT Parallel Interface and Timer device, assuming strapped for on board clock */
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MCFG_DEVICE_ADD("pit", PIT68230, XTAL_16MHz / 2)
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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 ("mvme350U40v2.3.bin", 0x0000, 0x4000, CRC (bcef82ef) SHA1 (e6fdf26e4714cbaeb3e97d7b5acf02d64d8ad744))
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ROM_LOAD16_BYTE ("mvme350U47v2.3.bin", 0x0001, 0x4000, CRC (582ce095) SHA1 (d0929dbfeb0cfda63df6b5bc29ee27fbf665def7))
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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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* It communicates with the master through data buffers in shared memory and VME bus interrupts
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* as desribed in
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* http://bitsavers.trailing-edge.com/pdf/motorola/_dataBooks/1987_Microcomputer_Systems_and_Components.pdf
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*
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* The board is pretty boring as stand alone, it initializes everything and then executes a STOP instruction
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* awaiting a CPU on the VME bus to request its services. However, it enables boot from tape devices, we just
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* need a MVME-131 and a dump of a VersaDOS or Motorola UNIX System V system tape and some work.
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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 (1984, mvme350, 0, 0, mvme350, mvme350, driver_device, 0, "Motorola", "MVME-350", MACHINE_NO_SOUND_HW | MACHINE_TYPE_COMPUTER )
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