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Diffstat (limited to 'src/devices/bus/isa/aha1542.cpp')
-rw-r--r--src/devices/bus/isa/aha1542.cpp200
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diff --git a/src/devices/bus/isa/aha1542.cpp b/src/devices/bus/isa/aha1542.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Darkstar
-/**********************************************************************
- *
- * Adaptec AHA-1542{,C,CF} SCSI Controller
- *
- **********************************************************************/
-
-/*
- PCB layout
- ----------
- Floppy SCSI
- +-----------+ +------------------+ +-
- +-----+-----------+-+------------------+--+
- | |
- | DIPSW DS1 |\
- | +-----+ | |
- | | | Y1 +---+ TRM TRM | |
- | | U3 | |U5 | |S|
- | U8 +-----+ +---+ |C|
- | +---+ +------+ +-------+ |S|
- | |U13| |U15 | Y2 | | |I|
- | +---+ +------+ | | | |
- | |U16 | |U17 | | |
- | +------+ +-------+ |/
- +-----------------------------------------+
- ||||||||| ||||||||||||||||||||||||| |
-
-
- DIPSW sw1 - sw8
- U3 Intel chip labelled "AHA-1542CF/552800-01 D/9346", probably FDC (82077)
- U5 Z84C0010VEC
- U8 EEPROM(?) labelled 545120A
- U13 CXK5864CM-10LL (64kbit SRAM)
- U15 M27C256B labelled "ADAPTEC INC/553801-00 C/MCODE 563D/(C) 1993"
- U16 M27C256B labelled "ADAPTEC INC/553601-00 C/BIOS C38D/(C) 1993"
- U17 AIC-7970Q
- Y1 XTAL SRX4054 93-38
- Y2 XTAL SRX4053 93-40
- TRM Dallas DS2107AS (SCSI termination)
- DS1 LED
-
-*/
-
-/*
- * The PCB has a couple of DIP switches:
- *
- * sw1 on enable termination
- * off software-controlled termination
- *
- * sw2 sw3 sw4 I/O Port
- * off off off 0x330 - 0x333 (default)
- * on off off 0x334 - 0x337
- * off on off 0x230 - 0x233
- * on on off 0x234 - 0x237
- * off off on 0x130 - 0x133
- * on off on 0x134 - 0x137
- * off on on reserved
- * on on on reserved
- *
- * sw5 on disable floppy interface
- * off enable floppy interface
- *
- * sw6 sw7 sw8 BIOS base address
- * off off off 0xdc000 (default)
- * on off off 0xd8000
- * off on off 0xd4000
- * on on off 0xd0000
- * off off on 0xcc000
- * on off on 0xc8000
- * off on on reserved
- * on on on BIOS disabled
- *
- * source: http://download.adaptec.com/pdfs/installation_guides/1540cfig.pdf
- */
-
-#include "emu.h"
-#include "aha1542.h"
-#include "cpu/z80/z80.h"
-
-// I/O Port interface
-// READ Port x+0: STATUS
-// WRITE Port x+0: CONTROL
-//
-// READ Port x+1: DATA
-// WRITE Port x+1: COMMAND
-//
-// READ Port x+2: INTERRUPT STATUS
-// WRITE Port x+2: (undefined?)
-//
-// R/W Port x+3: (undefined)
-
-// READ STATUS flags
-#define STAT_STST 0x80 // self-test in progress
-#define STAT_DIAGF 0x40 // internal diagnostic failure
-#define STAT_INIT 0x20 // mailbox initialization required
-#define STAT_IDLE 0x10 // HBA is idle
-#define STAT_CDFULL 0x08 // Command/Data output port is full
-#define STAT_DFULL 0x04 // Data input port is full
-#define STAT_INVCMD 0x01 // Invalid command
-
-// READ INTERRUPT STATUS flags
-#define INTR_ANY 0x80 // any interrupt
-#define INTR_SRCD 0x08 // SCSI reset detected
-#define INTR_HACC 0x04 // HA command complete
-#define INTR_MBOA 0x02 // MBO empty
-#define INTR_MBIF 0x01 // MBI full
-
-// WRITE CONTROL commands
-#define CTRL_HRST 0x80 // Hard reset
-#define CTRL_SRST 0x40 // Soft reset
-#define CTRL_IRST 0x20 // interrupt reset
-#define CTRL_SCRST 0x10 // SCSI bus reset
-
-// READ/WRITE DATA commands
-#define CMD_NOP 0x00 // No operation
-#define CMD_MBINIT 0x01 // mailbox initialization
-#define CMD_START_SCSI 0x02 // Start SCSI command
-#define CMD_BIOSCMD 0x03 // undocumented BIOS conmmand (shadow RAM etc.)
-#define CMD_INQUIRY 0x04 // Adapter inquiry
-#define CMD_EMBOI 0x05 // enable Mailbox Out Interrupt
-#define CMD_SELTIMEOUT 0x06 // Set SEL timeout
-#define CMD_BUSON_TIME 0x07 // set bus-On time
-#define CMD_BUSOFF_TIME 0x08 // set bus-off time
-#define CMD_DMASPEED 0x09 // set ISA DMA speed
-#define CMD_RETDEVS 0x0a // return installed devices
-#define CMD_RETCONF 0x0b // return configuration data
-#define CMD_TARGET 0x0c // set HBA to target mode
-#define CMD_RETSETUP 0x0d // return setup data
-#define CMD_ECHO 0x1f // ECHO command data (NetBSD says it is 0x1e)
-
-// these are for 1541C only:
-#define CMD_RETDEVSHI 0x23 // return devices 8-15 (from NetBSD)
-#define CMD_EXTBIOS 0x28 // return extended BIOS information
-#define CMD_MBENABLE 0x29 // set mailbox interface enable
-
-DEFINE_DEVICE_TYPE(AHA1542, aha1542_device, "aha1542", "AHA1542 SCSI Controller")
-
-#define Z84C0010_TAG "u5"
-
-READ8_MEMBER( aha1542_device::aha1542_r )
-{
- logerror("%s aha1542_r(): offset=%d\n", machine().describe_context(), offset);
- return 0xff;
-}
-
-WRITE8_MEMBER( aha1542_device::aha1542_w )
-{
- logerror("%s aha1542_w(): offset=%d data=0x%02x\n", machine().describe_context(), offset, data);
-}
-
-//-------------------------------------------------
-// ROM( aha1542 )
-//-------------------------------------------------
-
-ROM_START( aha1542 )
- ROM_REGION( 0x8000, "aha1542", 0 )
- ROM_LOAD( "553601-00.u16", 0x0000, 0x8000, CRC(ab22fc02) SHA1(f9f783e0272fc14ba3de32316997f1f6cadc67d0) ) /* Adaptec 1540CF/1542CF BIOS v2.01 */
-
- ROM_REGION( 0x8000, Z84C0010_TAG, 0 )
- ROM_LOAD( "553801-00.u15", 0x0000, 0x8000, CRC(7824397e) SHA1(35bc2c8fab31aad3190a478f2dc8f3a72958cf04) ) /* ADAPTEC, INC MCODE */
-ROM_END
-
-void aha1542_device::z84c0010_mem(address_map &map)
-{
- map(0x0000, 0x7fff).rom().region(Z84C0010_TAG, 0);
- map(0x8000, 0x800f).noprw(); // something is mapped there
- map(0x9000, 0xafff).ram(); // 2kb RAM chip
- map(0xe000, 0xe0ff).ram(); // probably PC<->Z80 communication area
- map(0xb000, 0xb000).noprw(); // something?
-}
-
-const tiny_rom_entry *aha1542_device::device_rom_region() const
-{
- return ROM_NAME( aha1542 );
-}
-
-MACHINE_CONFIG_START(aha1542_device::device_add_mconfig)
- MCFG_DEVICE_ADD(Z84C0010_TAG, Z80, XTAL(12'000'000))
- MCFG_DEVICE_PROGRAM_MAP( z84c0010_mem )
-MACHINE_CONFIG_END
-
-aha1542_device::aha1542_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
- device_t(mconfig, AHA1542, tag, owner, clock),
- device_isa16_card_interface(mconfig, *this)
-{
-}
-
-void aha1542_device::device_start()
-{
- set_isa_device();
- m_isa->install_rom(this, 0xdc000, 0xdffff, "aha1542", "aha1542");
- m_isa->install_device(0x330, 0x333, read8_delegate(FUNC( aha1542_device::aha1542_r ), this),
- write8_delegate(FUNC( aha1542_device::aha1542_w ), this) );
-}
-
-
-void aha1542_device::device_reset()
-{
-}