mirror of
https://github.com/holub/mame
synced 2025-06-04 03:46:29 +03:00
205 lines
6.7 KiB
C
205 lines
6.7 KiB
C
/**********************************************************************
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*
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* Adaptec AHA-1542{,C,CF} SCSI Controller
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*
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* Copyright MESS Team.
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* Visit http://mamedev.org for licensing and usage restrictions.
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*
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**********************************************************************/
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/*
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PCB layout
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----------
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Floppy SCSI
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+-----------+ +------------------+ +-
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+-----+-----------+-+------------------+--+
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| DIPSW DS1 |\
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| +-----+ | |
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| | | Y1 +---+ TRM TRM | |
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| | U3 | |U5 | |S|
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| U8 +-----+ +---+ |C|
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| +---+ +------+ +-------+ |S|
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| |U13| |U15 | Y2 | | |I|
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| +---+ +------+ | | | |
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| |U16 | |U17 | | |
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| +------+ +-------+ |/
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+-----------------------------------------+
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||||||||| ||||||||||||||||||||||||| |
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DIPSW sw1 - sw8
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U3 Intel chip labelled "AHA-1542CF/552800-01 D/9346", probably FDC (82077)
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U5 Z84C0010VEC
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U8 EEPROM(?) labelled 545120A
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U13 CXK5864CM-10LL (64kbit SRAM)
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U15 M27C256B labelled "ADAPTEC INC/553801-00 C/MCODE 563D/(C) 1993"
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U16 M27C256B labelled "ADAPTEC INC/553601-00 C/BIOS C38D/(C) 1993"
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U17 AIC-7970Q
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Y1 XTAL SRX4054 93-38
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Y2 XTAL SRX4053 93-40
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TRM Dallas DS2107AS (SCSI termination)
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DS1 LED
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*/
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/*
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* The PCB has a couple of DIP switches:
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*
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* sw1 on enable termination
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* off software-controlled termination
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*
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* sw2 sw3 sw4 I/O Port
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* off off off 0x330 - 0x333 (default)
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* on off off 0x334 - 0x337
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* off on off 0x230 - 0x233
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* on on off 0x234 - 0x237
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* off off on 0x130 - 0x133
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* on off on 0x134 - 0x137
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* off on on reserved
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* on on on reserved
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*
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* sw5 on disable floppy interface
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* off enable floppy interface
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*
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* sw6 sw7 sw8 BIOS base address
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* off off off 0xdc000 (default)
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* on off off 0xd8000
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* off on off 0xd4000
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* on on off 0xd0000
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* off off on 0xcc000
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* on off on 0xc8000
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* off on on reserved
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* on on on BIOS disabled
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*
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* source: http://download.adaptec.com/pdfs/installation_guides/1540cfig.pdf
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*/
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#include "isa_aha1542.h"
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#include "cpu/z80/z80.h"
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// I/O Port interface
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// READ Port x+0: STATUS
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// WRITE Port x+0: CONTROL
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//
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// READ Port x+1: DATA
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// WRITE Port x+1: COMMAND
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//
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// READ Port x+2: INTERRUPT STATUS
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// WRITE Port x+2: (undefined?)
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//
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// R/W Port x+3: (undefined)
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// READ STATUS flags
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#define STAT_STST 0x80 // self-test in progress
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#define STAT_DIAGF 0x40 // internal diagnostic failure
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#define STAT_INIT 0x20 // mailbox initialization required
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#define STAT_IDLE 0x10 // HBA is idle
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#define STAT_CDFULL 0x08 // Command/Data output port is full
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#define STAT_DFULL 0x04 // Data input port is full
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#define STAT_INVCMD 0x01 // Invalid command
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// READ INTERRUPT STATUS flags
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#define INTR_ANY 0x80 // any interrupt
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#define INTR_SRCD 0x08 // SCSI reset detected
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#define INTR_HACC 0x04 // HA command complete
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#define INTR_MBOA 0x02 // MBO empty
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#define INTR_MBIF 0x01 // MBI full
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// WRITE CONTROL commands
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#define CTRL_HRST 0x80 // Hard reset
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#define CTRL_SRST 0x40 // Soft reset
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#define CTRL_IRST 0x20 // interrupt reset
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#define CTRL_SCRST 0x10 // SCSI bus reset
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// READ/WRITE DATA commands
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#define CMD_NOP 0x00 // No operation
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#define CMD_MBINIT 0x01 // mailbox initialization
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#define CMD_START_SCSI 0x02 // Start SCSI command
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#define CMD_BIOSCMD 0x03 // undocumented BIOS conmmand (shadow RAM etc.)
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#define CMD_INQUIRY 0x04 // Adapter inquiry
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#define CMD_EMBOI 0x05 // enable Mailbox Out Interrupt
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#define CMD_SELTIMEOUT 0x06 // Set SEL timeout
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#define CMD_BUSON_TIME 0x07 // set bus-On time
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#define CMD_BUSOFF_TIME 0x08 // set bus-off time
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#define CMD_DMASPEED 0x09 // set ISA DMA speed
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#define CMD_RETDEVS 0x0a // return installed devices
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#define CMD_RETCONF 0x0b // return configuration data
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#define CMD_TARGET 0x0c // set HBA to target mode
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#define CMD_RETSETUP 0x0d // return setup data
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#define CMD_ECHO 0x1f // ECHO command data (NetBSD says it is 0x1e)
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// these are for 1541C only:
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#define CMD_RETDEVSHI 0x23 // return devices 8-15 (from NetBSD)
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#define CMD_EXTBIOS 0x28 // return extended BIOS information
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#define CMD_MBENABLE 0x29 // set mailbox interface enable
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const device_type AHA1542 = &device_creator<aha1542_device>;
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#define Z84C0010_TAG "u5"
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READ8_MEMBER( aha1542_device::aha1542_r )
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{
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printf("aha1542_r(): pc=0x%08x offset=%d\n", (unsigned) machine().firstcpu->pc(), offset);
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return 0xff;
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}
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WRITE8_MEMBER( aha1542_device::aha1542_w )
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{
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printf("aha1542_w(): pc=0x%08x offset=%d data=0x%02x\n", (unsigned) machine().firstcpu->pc(), offset, data);
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}
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//-------------------------------------------------
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// ROM( aha1542 )
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//-------------------------------------------------
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ROM_START( aha1542 )
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ROM_REGION( 0x8000, "aha1542", 0 )
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ROM_LOAD( "553601-00.u16", 0x0000, 0x8000, CRC(AB22FC02) SHA1(f9f783e0272fc14ba3de32316997f1f6cadc67d0) ) /* Adaptec 1540CF/1542CF BIOS v2.01 */
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ROM_REGION( 0x8000, Z84C0010_TAG, 0 )
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ROM_LOAD( "553801-00.u15", 0x0000, 0x8000, CRC(7824397E) SHA1(35bc2c8fab31aad3190a478f2dc8f3a72958cf04) ) /* ADAPTEC, INC MCODE */
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ROM_END
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static ADDRESS_MAP_START( z84c0010_mem, AS_PROGRAM, 8, aha1542_device )
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AM_RANGE(0x0000, 0x7fff) AM_ROM AM_REGION(Z84C0010_TAG, 0)
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AM_RANGE(0x8000, 0x800f) AM_NOP // something is mapped there
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AM_RANGE(0x9000, 0xafff) AM_RAM // 2kb RAM chip
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AM_RANGE(0xe000, 0xe0ff) AM_RAM // probably PC<->Z80 communication area
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AM_RANGE(0xb000, 0xb000) AM_NOP // something?
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ADDRESS_MAP_END
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static MACHINE_CONFIG_FRAGMENT( aha1542 )
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MCFG_CPU_ADD(Z84C0010_TAG, Z80, XTAL_12MHz)
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MCFG_CPU_PROGRAM_MAP( z84c0010_mem )
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MACHINE_CONFIG_END
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const rom_entry *aha1542_device::device_rom_region() const
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{
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return ROM_NAME( aha1542 );
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}
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machine_config_constructor aha1542_device::device_mconfig_additions() const
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{
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return MACHINE_CONFIG_NAME( aha1542 );
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}
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aha1542_device::aha1542_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
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device_t(mconfig, AHA1542, "AHA1542 SCSI Controller", tag, owner, clock, "aha1542", __FILE__ ),
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device_isa16_card_interface(mconfig, *this)
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{
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}
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void aha1542_device::device_start()
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{
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set_isa_device();
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m_isa->install_rom(this, 0xdc000, 0xdffff, 0, 0, "aha1542", "aha1542");
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m_isa->install_device(0x330, 0x333, 0, 0, read8_delegate(FUNC( aha1542_device::aha1542_r ), this),
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write8_delegate(FUNC( aha1542_device::aha1542_w ), this) );
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}
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void aha1542_device::device_reset()
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{
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}
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