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Diffstat (limited to 'src/devices/bus/isa/aha1542.c')
-rw-r--r-- | src/devices/bus/isa/aha1542.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/devices/bus/isa/aha1542.c b/src/devices/bus/isa/aha1542.c new file mode 100644 index 00000000000..cc557c47eaa --- /dev/null +++ b/src/devices/bus/isa/aha1542.c @@ -0,0 +1,203 @@ +// 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 "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 + +const device_type AHA1542 = &device_creator<aha1542_device>; + +#define Z84C0010_TAG "u5" + +READ8_MEMBER( aha1542_device::aha1542_r ) +{ + printf("%s aha1542_r(): offset=%d\n", machine().describe_context(), offset); + return 0xff; +} + +WRITE8_MEMBER( aha1542_device::aha1542_w ) +{ + printf("%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 + +static ADDRESS_MAP_START( z84c0010_mem, AS_PROGRAM, 8, aha1542_device ) + AM_RANGE(0x0000, 0x7fff) AM_ROM AM_REGION(Z84C0010_TAG, 0) + AM_RANGE(0x8000, 0x800f) AM_NOP // something is mapped there + AM_RANGE(0x9000, 0xafff) AM_RAM // 2kb RAM chip + AM_RANGE(0xe000, 0xe0ff) AM_RAM // probably PC<->Z80 communication area + AM_RANGE(0xb000, 0xb000) AM_NOP // something? +ADDRESS_MAP_END + +static MACHINE_CONFIG_FRAGMENT( aha1542 ) + MCFG_CPU_ADD(Z84C0010_TAG, Z80, XTAL_12MHz) + MCFG_CPU_PROGRAM_MAP( z84c0010_mem ) +MACHINE_CONFIG_END + +const rom_entry *aha1542_device::device_rom_region() const +{ + return ROM_NAME( aha1542 ); +} + +machine_config_constructor aha1542_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( aha1542 ); +} + +aha1542_device::aha1542_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, AHA1542, "AHA1542 SCSI Controller", tag, owner, clock, "aha1542", __FILE__ ), + device_isa16_card_interface(mconfig, *this) +{ +} + +void aha1542_device::device_start() +{ + set_isa_device(); + m_isa->install_rom(this, 0xdc000, 0xdffff, 0, 0, "aha1542", "aha1542"); + m_isa->install_device(0x330, 0x333, 0, 0, read8_delegate(FUNC( aha1542_device::aha1542_r ), this), + write8_delegate(FUNC( aha1542_device::aha1542_w ), this) ); +} + + +void aha1542_device::device_reset() +{ +} |