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|
// license:BSD-3-Clause
// copyright-holders:Joakim Larsson Edstr??m
/***************************************************************************
Force SYS68K CPU-1/CPU-6 VME SBC drivers, initially based on the 68ksbc.c
13/06/2015
The info found on the links below is for a later revisions of the board I have
but I hope it is somewhat compatible so I can get it up and running at least.
My CPU-1 board has proms from 1983 and no rev markings so probably the original.
http://bitsavers.trailing-edge.com/pdf/forceComputers/1988_Force_VMEbus_Products.pdf
http://www.artisantg.com/info/P_wUovN.pdf
Some info from those documents:
Address Map
----------------------------------------------------------
Address Range Description
----------------------------------------------------------
000 000 - 000 007 Initialisation vectors from system EPROM
000 008 - 01F FFF Dynamic RAM on CPU-1 B
000 008 - 07F FFF Dynamic RAM on CPU-1 D
080 008 - 09F FFF SYSTEM EPROM Area
OAO 000 - OBF FFF USER EPROMArea
0C0 041 - 0C0 043 ACIA (P3) Host
0C0 080 - 0C0 082 ACIA (P4) Terminal
0C0 101 - 0C0 103 ACIA (P5) Remote device (eg serial printer)
0C0 401 - 0C0 42F RTC
OEO 001 - 0E0 035 PI/T (eg centronics printer)
OEO 200 - 0E0 2FF FPU
OEO 300 - 0E0 300 Reset Off
OEO 380 - 0E0 380 Reset On
100 000 - FEF FFF VMEbus addresses (A24)
FFO 000 - FFF FFF VMEbus Short I/O (A16)
----------------------------------------------------------
Interrupt sources
----------------------------------------------------------
Description Device Lvl IRQ VME board
/Board Vector Address
----------------------------------------------------------
On board Sources
ABORT Switch 7 31
Real Time Clock (RTC) 58167A 6 30
Parallel/Timer (PI/T) 68230 5 29
Terminal ACIA 6850 4 28
Remote ACIA 6850 3 27
Host ACIA 6850 2 26
ACFAIL, SYSFAIL VME 5 29
Off board Sources (other VME boards)
6 Port Serial I/O board SIO 4 64-75 0xb00000
8 Port Serial I/O board ISIO 4 76-83 0x960000
Disk Controller WFC 3 119 0xb01000
SCSI Controller ISCSI 4 119 0xa00000
Slot 1 Controller Board ASCU 7 31 0xb02000
----------------------------------------------------------
10. The VMEbus
---------------
The implemented VMEbus Interface includes 24 address, 16 data,
6 address modifier and the asynchronous control signals.
A single level bus arbiter is provided to build multi master
systems. In addition to the bus arbiter, a separate slave bus
arbitration allows selection of the arbitration level (0-3).
The address modifier range .,Short 110 Access?? can be selected
via a jumper for variable system generation. The 7 interrupt
request levels of the VMEbus are fully supported from the
SYS68K1CPU-1 B/D. For multi-processing, each IRQ signal can be
enabled/disabled via a jumper field.
Additionally, the SYS68K1CPU-1 B/D supports the ACFAIL, SYSRESET,
SYSFAIL and SYSCLK signal (16 MHz).
TODO:
- Finish 2 x ACIA6850, host and remote interface left, terminal works
- Finish 1 x 68230 Motorola, Parallel Interface / Timer
- Connect Port B to a Centronics printer interface
- Add 1 x Abort Switch
- Add configurable serial connector between ACIA:s and
- Real terminal emulator, ie rs232 "socket"
- Debug console
- Add VME bus driver
****************************************************************************/
#include "emu.h"
#include "bus/rs232/rs232.h"
#include "cpu/m68000/m68000.h"
#include "machine/mm58167.h"
#include "machine/68230pit.h"
#include "machine/6850acia.h"
#include "machine/clock.h"
#define BAUDGEN_CLOCK XTAL_1_8432MHz
/*
The baudrate on the Force68k CPU-1 to CPU-6 is generated by a
Motorola 14411 bitrate generator, the CPU-6 documents matches the circuits
that I could find on the CPU-1 board. Here how I calculated the clock for
the factory settings. No need to add selectors until terminal.c supports
configurable baudrates. Fortunality CPU-1 was shipped with 9600N8!
From the documents:
3 RS232C interfaces, strap selectable baud rate from 110-9600 or 600-19200 baud
Default Jumper Settings of B7:
--------------------------------
GND 10 - 11 RSA input on 14411
F1 on 14411 1 - 20 Baud selector of the terminal port
F1 on 14411 3 - 18 Baud selector of the host port
F1 on 14411 5 - 16 Baud selector of the remote port
The RSB input on the 14411 is kept high always so RSA=0, RSB=1 and a 1.8432MHz crystal
generates 153600 on the F1 output pin which by default strapping is connected to all
three 6850 acias on the board. These can be strapped separatelly to speedup downloads.
The selectable outputs from 14411, F1-F16:
X16 RSA=0,RSB=1: 153600, 115200, 76800, 57600, 38400, 28800, 19200, 9600, 4800, 3200, 2153.3, 1758.8, 1200, 921600, 1843000
X64 RSA=1,RSB=1: 614400, 460800, 307200, 230400, 153600, 115200, 76800, 57600, 38400, 28800, 19200, 9600, 4800, 921600, 1843000
However, the datasheet says baudrate is strapable for 110-9600 but the output is 153600
so the system rom MUST setup the acia to divide by 16 to generate the correct baudrate.
*/
#define ACIA_CLOCK (BAUDGEN_CLOCK / 12)
class force68k_state : public driver_device
{
public:
force68k_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
// m_rtc(*this, "rtc")
m_maincpu(*this, "maincpu"),
m_rtc(*this, "rtc"),
m_pit(*this, "pit"),
m_aciahost(*this, "aciahost"),
m_aciaterm(*this, "aciaterm"),
m_aciaremt(*this, "aciaremt")
{
}
DECLARE_READ16_MEMBER(bootvect_r);
virtual void machine_start();
DECLARE_WRITE_LINE_MEMBER(write_aciahost_clock);
DECLARE_WRITE_LINE_MEMBER(write_aciaterm_clock);
DECLARE_WRITE_LINE_MEMBER(write_aciaremt_clock);
private:
required_device<cpu_device> m_maincpu;
required_device<mm58167_device> m_rtc;
required_device<pit68230_device> m_pit;
required_device<acia6850_device> m_aciahost;
required_device<acia6850_device> m_aciaterm;
required_device<acia6850_device> m_aciaremt;
// Pointer to System ROMs needed by bootvect_r
UINT16 *m_sysrom;
};
static ADDRESS_MAP_START(force68k_mem, AS_PROGRAM, 16, force68k_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x000000, 0x000007) AM_ROM AM_READ(bootvect_r) /* Vectors mapped from System EPROM */
AM_RANGE(0x000008, 0x01ffff) AM_RAM /* DRAM */
AM_RANGE(0x080000, 0x09ffff) AM_ROM /* System EPROM Area */
// AM_RANGE(0x0a0000, 0x0bffff) AM_ROM /* User EPROM Area */
AM_RANGE(0x0c0040, 0x0c0041) AM_DEVREADWRITE8("aciahost", acia6850_device, status_r, control_w, 0x00ff)
AM_RANGE(0x0c0042, 0x0c0043) AM_DEVREADWRITE8("aciahost", acia6850_device, data_r, data_w, 0x00ff)
AM_RANGE(0x0c0080, 0x0c0081) AM_DEVREADWRITE8("aciaterm", acia6850_device, status_r, control_w, 0xff00)
AM_RANGE(0x0c0082, 0x0c0083) AM_DEVREADWRITE8("aciaterm", acia6850_device, data_r, data_w, 0xff00)
AM_RANGE(0x0c0100, 0x0c0101) AM_DEVREADWRITE8("aciaremt", acia6850_device, status_r, control_w, 0x00ff)
AM_RANGE(0x0c0102, 0x0c0103) AM_DEVREADWRITE8("aciaremt", acia6850_device, data_r, data_w, 0x00ff)
AM_RANGE(0x0c0400, 0x0c042f) AM_DEVREADWRITE8("rtc", mm58167_device, read, write, 0x00ff)
AM_RANGE(0x0e0000, 0x0e0035) AM_DEVREADWRITE8("pit", pit68230_device, data_r, data_w, 0x00ff)
// AM_RANGE(0x0e0200, 0x0e0380) AM_READWRITE(fpu_r, fpu_w) /* optional FPCP 68881 FPU interface */
// AM_RANGE(0x100000, 0xfeffff) /* VMEbus Rev B addresses (24 bits) */
// AM_RANGE(0xff0000, 0xffffff) /* VMEbus Rev B addresses (16 bits) */
ADDRESS_MAP_END
/* Input ports */
static INPUT_PORTS_START( force68k )
INPUT_PORTS_END
void force68k_state::machine_start()
{
m_sysrom = (UINT16*)(memregion("maincpu")->base() + 0x080000);
}
READ16_MEMBER(force68k_state::bootvect_r)
{
return m_sysrom[offset];
}
WRITE_LINE_MEMBER(force68k_state::write_aciahost_clock)
{
m_aciahost->write_txc(state);
m_aciahost->write_rxc(state);
}
WRITE_LINE_MEMBER(force68k_state::write_aciaterm_clock)
{
m_aciaterm->write_txc(state);
m_aciaterm->write_rxc(state);
}
WRITE_LINE_MEMBER(force68k_state::write_aciaremt_clock)
{
m_aciaremt->write_txc(state);
m_aciaremt->write_rxc(state);
}
static MACHINE_CONFIG_START( fccpu1, force68k_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", M68000, XTAL_16MHz / 2)
MCFG_CPU_PROGRAM_MAP(force68k_mem)
/* P3/Host Port config */
MCFG_DEVICE_ADD("aciahost", ACIA6850, 0)
MCFG_DEVICE_ADD("aciahost_clock", CLOCK, ACIA_CLOCK)
MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(force68k_state, write_aciahost_clock))
/* P4/Terminal Port config */
MCFG_DEVICE_ADD("aciaterm", ACIA6850, 0)
MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232trm", rs232_port_device, write_txd))
MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232trm", rs232_port_device, write_rts))
MCFG_RS232_PORT_ADD("rs232trm", default_rs232_devices, "terminal")
MCFG_RS232_RXD_HANDLER(DEVWRITELINE("aciaterm", acia6850_device, write_rxd))
MCFG_RS232_CTS_HANDLER(DEVWRITELINE("aciaterm", acia6850_device, write_cts))
MCFG_DEVICE_ADD("aciaterm_clock", CLOCK, ACIA_CLOCK)
MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(force68k_state, write_aciaterm_clock))
/* P5/Remote Port config */
MCFG_DEVICE_ADD("aciaremt", ACIA6850, 0)
#define PRINTER 0
#if PRINTER
MCFG_ACIA6850_TXD_HANDLER(DEVWRITELINE("rs232rmt", rs232_port_device, write_txd))
MCFG_ACIA6850_RTS_HANDLER(DEVWRITELINE("rs232rmt", rs232_port_device, write_rts))
MCFG_RS232_PORT_ADD("rs232rmt", default_rs232_devices, "printer")
MCFG_RS232_RXD_HANDLER(DEVWRITELINE("aciaremt", acia6850_device, write_rxd))
MCFG_RS232_CTS_HANDLER(DEVWRITELINE("aciaremt", acia6850_device, write_cts))
#endif
MCFG_DEVICE_ADD("aciaremt_clock", CLOCK, ACIA_CLOCK)
MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(force68k_state, write_aciaterm_clock))
/* RTC Real Time Clock device */
MCFG_DEVICE_ADD("rtc", MM58167, XTAL_32_768kHz)
/* PIT Parallel Interface and Timer device, assuming strapped for on board clock */
MCFG_DEVICE_ADD("pit", PIT68230, XTAL_16MHz / 2)
MACHINE_CONFIG_END
#if 0
static MACHINE_CONFIG_START( fccpu6, force68k_state )
MCFG_CPU_ADD("maincpu", M68000, XTAL_8MHz) /* Jumper B10 Mode B */
MCFG_CPU_PROGRAM_MAP(force68k_mem)
MACHINE_CONFIG_END
static MACHINE_CONFIG_START( fccpu6a, force68k_state )
MCFG_CPU_ADD("maincpu", M68000, XTAL_12_5MHz) /* Jumper B10 Mode A */
MCFG_CPU_PROGRAM_MAP(force68k_mem)
MACHINE_CONFIG_END
static MACHINE_CONFIG_START( fccpu6v, force68k_state )
MCFG_CPU_ADD("maincpu", M68010, XTAL_8MHz) /* Jumper B10 Mode B */
MCFG_CPU_PROGRAM_MAP(force68k_mem)
MACHINE_CONFIG_END
static MACHINE_CONFIG_START( fccpu6va, force68k_state )
MCFG_CPU_ADD("maincpu", M68010, XTAL_12_5MHz) /* Jumper B10 Mode A */
MCFG_CPU_PROGRAM_MAP(force68k_mem)
MACHINE_CONFIG_END
static MACHINE_CONFIG_START( fccpu6vb, force68k_state )
MCFG_CPU_ADD("maincpu", M68010, XTAL_12_5MHz) /* Jumper B10 Mode A */
MCFG_CPU_PROGRAM_MAP(force68k_mem)
MACHINE_CONFIG_END
#endif
/* ROM definitions */
ROM_START( fccpu1 )
ROM_REGION(0x1000000, "maincpu", 0)
ROM_LOAD16_BYTE( "fccpu1V1.0L.j8.bin", 0x080001, 0x2000, CRC(3ac6f08f) SHA1(502f6547b508d8732bd68bbbb2402d8c30fefc3b) )
ROM_LOAD16_BYTE( "fccpu1V1.0L.j9.bin", 0x080000, 0x2000, CRC(035315fb) SHA1(90dc44d9c25d28428233e6846da6edce2d69e440) )
/* COMMAND SUMMARY DESCRIPTION (From CPU-1B datasheet, ROMs were dumped
from a CPU-1 board so some features might be missing or different)
---------------------------------------------------------------------------
BF <address1> <address2> <data> <CR> Block Fill memory - from addr1 through addr2 with data
BM <address1> <address2> <address 3> <CR> Block Move - move from addr1 through addr2to addr3
BR [<address> [; <count>] ... ] <CR> Set/display Breakpoint
BS <address1> <address2> <data> <CR> Block Search - search addr1 through addr2 for data
BT <address1> <address2> <CR> Block Test of memory
DC <expression> <CR> Data Conversion
DF <CR> Display Formatted registers
DU [n] <address1> <address2>[<string>] <CR> Dump memory to object file
GO [<address] <CR> Execute program
GD [<address] <CR> Go Direct
GT <address> <CR> Exec prog: temporary breakpoint
HE<CR> Help; display monitor commands
LO [n] [;<options] <CR> Load Object file
MD <address> [<count?? <CR> Memory Display
MM <address> [<data?? [;<options?? <CR> Memory Modify
MS <address> <data1 > <data2> < ... <CR> Memory Set - starting at addr with data 1. data 2 ...
NOBR [<address> ... ] <CR> Remove Breakpoint
NOPA <CR> Printer Detach (Centronics on PIT/P2)
OF <CR> Offset
PA <CR> Printer Attach (Centronics on PIT/P2)
PF[n] <CR> Set/display Port Format
RM <CR> Register Modify
TM [<exit character?? <CR> Transparent Mode
TR [<count] <CR> Trace
TT <address> <CR> Trace: temporary breakpoint
VE [n] [<string] <CR> Verify memory/object file
----------------------------------------------------------------------------
.AO - .A7 [<expression] <CR> Display/set address register
.00 - .07 [<expression] <CR> Display/set data register
.RO - .R6 [<expression] <CR> Display/set offset register
.PC [<expression] <CR> Display/set program counter
.SR [<expression] <CR> Display/set status register
.SS [<expression] <CR> Display/set supervisor stack
.US [<expression] <CR> Display/set user stack
----------------------------------------------------------------------------
MD <address> [<count>]; D1 <CR> Disassemble memory location
MM <address>; DI <CR> Disassemble/Assemble memory location
----------------------------------------------------------------------------
*/
ROM_END
#if 0
ROM_START( fccpu6 )
ROM_REGION(0x1000000, "maincpu", 0)
ROM_END
ROM_START( fccpu6a )
ROM_REGION(0x1000000, "maincpu", 0)
ROM_END
ROM_START( fccpu6v )
ROM_REGION(0x1000000, "maincpu", 0)
ROM_END
ROM_START( fccpu6va )
ROM_REGION(0x1000000, "maincpu", 0)
ROM_END
ROM_START( fccpu6vb )
ROM_REGION(0x1000000, "maincpu", 0)
ROM_END
#endif
/* Driver */
/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
COMP( 1983, fccpu1, 0, 0, fccpu1, force68k, driver_device, 0, "Force Computers Gmbh", "SYS68K/CPU-1", MACHINE_NO_SOUND_HW | MACHINE_TYPE_COMPUTER )
//COMP( 1989, fccpu6, 0, 0, fccpu6, force68k, driver_device, 0, "Force Computers Gmbh", "SYS68K/CPU-6", MACHINE_IS_SKELETON )
//COMP( 1989, fccpu6a, 0, 0, fccpu6a, force68k, driver_device, 0, "Force Computers Gmbh", "SYS68K/CPU-6a", MACHINE_IS_SKELETON )
//COMP( 1989, fccpu6v, 0, 0, fccpu6v, force68k, driver_device, 0, "Force Computers Gmbh", "SYS68K/CPU-6v", MACHINE_IS_SKELETON )
//COMP( 1989, fccpu6va, 0, 0, fccpu6va, force68k, driver_device, 0, "Force Computers Gmbh", "SYS68K/CPU-6va", MACHINE_IS_SKELETON )
//COMP( 1989, fccpu6vb, 0, 0, fccpu6vb, force68k, driver_device, 0, "Force Computers Gmbh", "SYS68K/CPU-6vb", MACHINE_IS_SKELETON )
|