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Added VME local address mapping to dummy access methods

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Joakim Larsson Edstrom 2015-08-07 20:41:18 +02:00 committed by Joakim Larsson Edström
parent 06e8aef36c
commit 7ba539c6a0
1 changed files with 122 additions and 24 deletions
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146
src/mess/drivers/force68k.c
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@ -59,23 +59,6 @@
* 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 3 x ACIA6850, host and remote interface left, terminal works
* - Finish 1 x 68230 Motorola, Parallel Interface / Timer as required by ROM
@ -100,8 +83,10 @@
#include "machine/6850acia.h"
#include "machine/clock.h"
#include "bus/centronics/ctronics.h"
#include "bus/generic/slot.h"
#include "bus/generic/carts.h"
#define LOG(x) /* x */
#define LOG(x) x
#define BAUDGEN_CLOCK XTAL_1_8432MHz
/*
@ -152,10 +137,15 @@ force68k_state(const machine_config &mconfig, device_type type, const char *tag)
, m_centronics_busy (0)
, m_centronics_perror (0)
, m_centronics_select (0)
,m_cart(*this, "exp_rom1")
{
}
DECLARE_READ16_MEMBER (bootvect_r);
DECLARE_READ16_MEMBER (vme_a24_r);
DECLARE_WRITE16_MEMBER (vme_a24_w);
DECLARE_READ16_MEMBER (vme_a16_r);
DECLARE_WRITE16_MEMBER (vme_a16_w);
virtual void machine_start ();
// clocks
DECLARE_WRITE_LINE_MEMBER (write_aciahost_clock);
@ -166,6 +156,9 @@ DECLARE_WRITE_LINE_MEMBER (centronics_ack_w);
DECLARE_WRITE_LINE_MEMBER (centronics_busy_w);
DECLARE_WRITE_LINE_MEMBER (centronics_perror_w);
DECLARE_WRITE_LINE_MEMBER (centronics_select_w);
// User EPROM/SRAM slot(s)
//int force68k_load_cart(device_image_interface &image, generic_slot_device *slot);
//DECLARE_DEVICE_IMAGE_LOAD_MEMBER (exp1_load) { return force68k_load_cart(image, m_cart); }
protected:
@ -185,14 +178,17 @@ INT32 m_centronics_select;
// Pointer to System ROMs needed by bootvect_r
UINT16 *m_sysrom;
required_device<generic_slot_device> m_cart;
};
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 (0x000008, 0x01ffff) AM_RAM /* DRAM */
AM_RANGE (0x080000, 0x09ffff) AM_ROM /* System EPROM Area */
//AM_RANGE (0x0a0000, 0x0bffff) AM_ROM /* User EPROM/SRAM Area, mapped by a cartslot */
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)
@ -202,8 +198,8 @@ AM_RANGE (0x0c0102, 0x0c0103) AM_DEVREADWRITE8 ("aciaremt", acia6850_device, dat
AM_RANGE (0x0c0400, 0x0c042f) AM_DEVREADWRITE8 ("rtc", mm58167_device, read, write, 0x00ff)
AM_RANGE (0x0e0000, 0x0e0035) AM_DEVREADWRITE8 ("pit", pit68230_device, read, write, 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) */
AM_RANGE(0x100000, 0xfeffff) AM_READWRITE(vme_a24_r, vme_a24_w) /* VMEbus Rev B addresses (24 bits) */
AM_RANGE(0xff0000, 0xffffff) AM_READWRITE(vme_a16_r, vme_a16_w) /* VMEbus Rev B addresses (16 bits) */
ADDRESS_MAP_END
/* Input ports */
@ -294,6 +290,15 @@ void force68k_state::machine_start ()
/* Setup pointer to bootvector in ROM for bootvector handler bootvect_r */
m_sysrom = (UINT16*)(memregion ("maincpu")->base () + 0x080000);
/* Map user ROM/RAM socket(s) */
if (m_cart->exists())
{
m_maincpu->space(AS_PROGRAM).install_read_handler(0xa0000,
0xaffff,
read16_delegate(FUNC(generic_slot_device::read16_rom),
(generic_slot_device*)m_cart));
}
}
/* Boot vector handler, the PCB hardwires the first 8 bytes from 0x80000 to 0x0 */
@ -301,6 +306,43 @@ READ16_MEMBER (force68k_state::bootvect_r){
return m_sysrom [offset];
}
/* 10. The VMEbus (text from board documentation)
* ---------------
* 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).
*/
/* Dummy VME access methods until the VME bus device is ready for use */
READ16_MEMBER (force68k_state::vme_a24_r){
LOG (logerror ("vme_a24_r\n"));
return (UINT16) 0;
}
WRITE16_MEMBER (force68k_state::vme_a24_w){
LOG (logerror ("vme_a24_w\n"));
}
READ16_MEMBER (force68k_state::vme_a16_r){
LOG (logerror ("vme_16_r\n"));
return (UINT16) 0;
}
WRITE16_MEMBER (force68k_state::vme_a16_w){
LOG (logerror ("vme_a16_w\n"));
}
/*
* Serial port clock sources can all be driven by different outputs of the 14411
*/
@ -319,6 +361,54 @@ WRITE_LINE_MEMBER (force68k_state::write_aciaremt_clock){
m_aciaremt->write_rxc (state);
}
/*
* 4. The USER Area (Text from the board manual)
The USER area contains two 28 pin sockets with JEDEC compatible pin out.
To allow the usage of static RAM's, the access to the USER area is byte
oriented. Table 3. lists the usable device types.
Bits Bytes EPROM SRAM
--------------------------
2Kx16 4 Kbyte 2716 6116
4Kx16 8 Kbyte 2732
8Kx16 16 Kbyte 2764 6264
16Kx16 32 Kbyte 27128
32Kx16 64 Kbyte 27256
--------------------------
*/
// Implementation of static 64K EPROM in sockets J10/J11 as 16 bit wide cartridge for easier
// software handling. TODO: make configurable according to table above.
static MACHINE_CONFIG_FRAGMENT( fccpu1_eprom_sockets )
MCFG_GENERIC_CARTSLOT_ADD("exp_rom1", generic_linear_slot, "fccpu1_cart")
MCFG_GENERIC_EXTENSIONS("bin,rom")
MCFG_GENERIC_WIDTH(GENERIC_ROM16_WIDTH)
MCFG_GENERIC_ENDIAN(ENDIANNESS_LITTLE) // In generic call_load() len 12152, width 2 endianess 0
// MCFG_GENERIC_ENDIAN(ENDIANNESS_BIG) // In generic call_load() len 12152, width 2 endianess 1
// MCFG_GENERIC_LOAD(force68k_state, exp1_load)
// MCFG_SOFTWARE_LIST_ADD("cart_list", "fccpu1_cart")
MACHINE_CONFIG_END
/***************************
Rom loading functions
****************************/
int force68k_state::force68k_load_cart(device_image_interface &image, generic_slot_device *slot)
{
UINT32 size = slot->common_get_size("rom");
printf("force68k_load_cart() loading rom at slot %s for image \n", (char *) image.device_typename);
if (size > 0x10000) // Max 64Kb
{
LOG( printf("Cartridge size exceeding max size (64Kb): %d\n", size) );
image.seterror(IMAGE_ERROR_UNSPECIFIED, "Cartridge size exceeding max size (64Kb)");
return IMAGE_INIT_FAIL;
}
slot->rom_alloc(size, GENERIC_ROM16_WIDTH, ENDIANNESS_BIG);
slot->common_load_rom(slot->get_rom_base(), size, "rom");
return IMAGE_INIT_PASS;
}
/*
* Machine configuration
*/
@ -327,7 +417,12 @@ static MACHINE_CONFIG_START (fccpu1, force68k_state)
MCFG_CPU_ADD ("maincpu", M68000, XTAL_16MHz / 2)
MCFG_CPU_PROGRAM_MAP (force68k_mem)
/* P3/Host Port config */
/* P3/Host Port config
* LO command causes ROM monitor to expect S-records on HOST port by default
* Implementation through nullmodem currently does not support handshakes so
* the ROM momitor is over-run while checking for checksums etc if used with
* UI mount <file> feature.
*/
MCFG_DEVICE_ADD ("aciahost", ACIA6850, 0)
MCFG_ACIA6850_TXD_HANDLER (DEVWRITELINE ("rs232host", rs232_port_device, write_txd))
@ -374,6 +469,9 @@ MCFG_CENTRONICS_BUSY_HANDLER (WRITELINE (force68k_state, centronics_busy_w))
MCFG_CENTRONICS_PERROR_HANDLER (WRITELINE (force68k_state, centronics_perror_w))
MCFG_CENTRONICS_SELECT_HANDLER (WRITELINE (force68k_state, centronics_select_w))
MCFG_CENTRONICS_OUTPUT_LATCH_ADD ("cent_data_out", "centronics")
// EPROM sockets
MCFG_FRAGMENT_ADD(fccpu1_eprom_sockets)
MACHINE_CONFIG_END
#if 0 /*