/**************************************************************************** Peripheral expansion system The ti-99/4, ti-99/4a, ti computer 99/8, myarc geneve, and snug sgcpu 99/4p systems all feature a bus connector that enables the connection of extension cards. (Although the hexbus is the preferred bus to add additional peripherals to a ti-99/8, ti-99/8 is believed to be compatible with the older PEB system.) In the case of the TI consoles, this bus connector is located on the right side of the console. While a few extension cards connect to the side bus connector of the ti-99/4(a) console directly, most extension cards were designed to be inserted in a PEB instead. The PEB (Peripheral Expansion Box) is a big box with power supply, a few bus drivers, and several card slots, that connects to the ti-99/4(a) side port. The reason for using a PEB is that daisy-chaining many modules caused the system to be unreliable due to the noise produced by the successive contacts. (As a matter of fact, TI initially released most of its extension cards as side bus units, but when the design proved to be unreliable, the PEB was introduced. The TI speech synthesizer was the only TI extension that remained on the side bus after the introduction of the PEB, probably because TI wanted the speech synthesizer to be a cheap extension, and the PEB was not cheap.) =================## connection cable to console || || +--------------+----+----+----+----+----+----+----+----+------------+ | | S | S | S | S | S | S | S | S : | | | L | L | L | L | L | L | L | L : | | Power | O | O | O | O | O | O | O | O : Floppy | | unit | T | T | T | T | T | T | T | T | drive | | and | | | | | | | | | compartment| | ventilation | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | | | | | | | | | | | | 1 full hgt | | | | | | | | | | | or | | | | | | | | | | | 2 "slim" | | | | | | | | |LED |LED | | | +----+----+----+----+----+----+-|--+-|--+ | | : seen from above | | | | +--------------+-------------------------------O----O---------------+ All slots are connected in parallel with all signal lines. The cards must be equipped with bus drivers (244/245) and are usually activated by turning a CRU bit on (except for the memory expansions which are always active). This is emulation in exactly the same way. The data coming from the console is propagated to all slots, and each card decides whether to react or not. Similarly, for read operations, all cards are checked, and only the active cards actually put a value on the data bus (we do this using the bus8z_device; see ti99defs.h). Slot 1 is usually reserved for the "Flex cable interface" when connecting a TI-99/4(A)/8 console. Also, the Geneve is put into slot 1. We therefore do not offer peb:slot1. Slot 8 is usually used for floppy controllers as there is a passthrough for cables. Slots: REAR +8V 1||2 +8V GND 3||4 READY GND 5||6 RESET* GND 7||8 SCLK BOOTPG* 9||10 AUDIO RDBENA* 11||12 PCBEN HOLD* 13||14 IAQHDA SENILA* 15||16 SENILB* INTA* 17||18 INTB* D7 19||20 GND D5 21||22 D6 D3 23||24 D4 D1 25||26 D2 GND 27||28 D0 A14 29||30 A15/CRUOUT A12 31||32 A13 A10 33||34 A11 A8 35||36 A9 A6 37||38 A7 A4 39||40 A5 A2 41||42 A3 A0 43||44 A1 AMB 45||46 AMA GND 47||48 AMC GND 49||50 CLKOUT* CRUCLK* 51||52 DBIN GND 53||54 WE* CRUIN 55||56 MEMEN* -16V 57||58 -16V +16V 59||60 +16V FRONT < from box to console > from console into box READYA < System ready (goes to READY, 10K pull-up to +5V) A low level puts the cpu on hold. RESET* > System reset (active low) SCLK nc System clock (not connected in interface card) LCP* nc CPU indicator 1=TI99 0=2nd generation (not connected in interface card) BOOTPG* nc ? AUDIO < Input audio (to AUDIOIN in console) RDBENA* < Active low: enable flex cable data bus drivers (1K pull-up) PCBEN H PCB enable for burn-in (always High) HOLD* H Active low CPU hold request (always High) IAQHDA nc IAQ [or] HOLDA (logical or) SENILA* H(>) Interrupt level A sense enable (always High) SENILB* H(>) Interrupt level B sense enable (always High) INTA* < Interrupt level A (active low, goes to EXTINT*) INTB* nc Interrupt level B (not used) LOAD* nc Unmaskable interrupt (not carried by interface cable/card) D0-D7 <> Data bus (D0 most significant) A0-A15 > Address bus (A0 most sig; A15 also used as CRUOUT) AMA/B/C H Extra address bits (always high for TI-99/4x, but used with SGCPU and Geneve) CLKOUT* > Inverted PHI3 clock, from TIM9904 clock generator CRUCLK* > Inverted CRU clock, from TMS9900 CRUCLK pin DBIN > Active high = read memory. Drives the data bus buffers. WE* > Write Enable pulse (derived from TMS9900 WE* pin) CRUIN < CRU input bit to TMS9900 MEMEN* > Memory access enable (active low) The SENILx lines are somewhat obscure, since there have never been hardware or software that made practical use of them. The intended use can be guessed from some few traditional cards (like the TI RS232) which indeed have connections. With SENILA* asserted (low), a value shall be put on the data bus, representing the interrupt status bits. It can also be used to determine the source of the interrupt: The RS232 card (in its standard configuration) uses the data bus bits 0 and 1 for its two UARTs, while in the second configuration, it uses bits 4 and 5. SENILB* / INTB* was planned to be used with disk controllers. The PHP1240 disk controller puts the value of INTB* on D0 when SENILB* gets active (low) which reflects the INTRQ output pin of the WD1771. This signal is not used, however. Instead, the disk controller combines DRQ and IRQ and makes use of a READY/HOLD control of the CPU. Obviously, SENILA* and SENILB* should never be active at the same time, and neither should any memory access to a card be active at the same time, for in both cases, data bus lines may be set to different levels simultaneously. One possible application case is to turn off all cards in the box, assert SENILA*, and then do a read access in the memory area of any card in the P-Box (e.g. 0x4000-0x5fff). Another possiblity is that the currently active card simply does not respond to a certain memory access, and in this case the status bits can be read. Also note that the SENILx lines access all cards in parallel, meaning that there must be an agreement which cards may use which bits on the data bus. The lines do not depend on the card being active at that time. Emulation architecture console ---- peribox --+ [-- slot1 (always occupied by console connector) ] | +--- slot2 --- card | +--- slot3 --- card : +--- slot8 --- card (usually some floppy controller) We have an instance of peribox_device which contains 7 slots (peribox_slot_device) which are subclasses of device_slot_interface. Each slot may host one of several cards (ti_expansion_card_device), which are subclassed from device_slot_card_interface. For bus8z_device consult ti99defs.h --------------------- June 2010: Reimplemented using device structure (MZ) (obsoletes 99_peb.c) January 2012: Reimplemented as class (MZ) *****************************************************************************/ #include "emu.h" #include "peribox.h" // The cards #include "ti32kmem.h" #include "ti_fdc.h" #include "bwg.h" #include "hfdc.h" #include "p_code.h" #include "myarcmem.h" #include "samsmem.h" #include "tn_ide.h" #include "tn_usbsm.h" #include "evpc.h" #include "hsgpl.h" #include "ti_rs232.h" #include "spchsyn.h" #include "memex.h" #include "horizon.h" #include "formats/ti99_dsk.h" #define LOG logerror #define VERBOSE 1 #define PEBSLOT2 "slot2" #define PEBSLOT3 "slot3" #define PEBSLOT4 "slot4" #define PEBSLOT5 "slot5" #define PEBSLOT6 "slot6" #define PEBSLOT7 "slot7" #define PEBSLOT8 "slot8" // TODO: Connect other lines (think about how to propagate to the controller) static const floppy_interface ti99_4_floppy_interface = { DEVCB_DEVICE_LINE_MEMBER( DEVICE_SELF_OWNER, peribox_device, indexhole ), // Index hole (floppy out, line) DEVCB_NULL, // Motor (floppy in, line) DEVCB_NULL, // Track 0 (out, line) DEVCB_NULL, // Write protect (out, line) DEVCB_NULL, // Ready (out, line) FLOPPY_STANDARD_5_25_DSHD, // type LEGACY_FLOPPY_OPTIONS_NAME(ti99), // image formats NULL, // interface NULL // display info }; peribox_device::peribox_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : bus8z_device(mconfig, PERIBOX, "Peripheral expansion box", tag, owner, clock) { for (int i=2; i <= 8; i++) m_slot[i] = NULL; } READ8Z_MEMBER(peribox_device::readz) { for (int i=2; i <= 8; i++) { if (m_slot[i]!=NULL) m_slot[i]->readz(space, offset | m_address_prefix, value, mem_mask); } } WRITE8_MEMBER(peribox_device::write) { for (int i=2; i <= 8; i++) { if (m_slot[i]!=NULL) m_slot[i]->write(space, offset | m_address_prefix, data, mem_mask); } } void peribox_device::crureadz(offs_t offset, UINT8 *value) { for (int i=2; i <= 8; i++) { if (m_slot[i]!=NULL) m_slot[i]->crureadz(offset, value); } } void peribox_device::cruwrite(offs_t offset, UINT8 data) { for (int i=2; i <= 8; i++) { if (m_slot[i]!=NULL) m_slot[i]->cruwrite(offset, data); } } /* And here are finally the two mythical lines SENILA* and SENILB*; mythical since there is no report of any software that ever used them. */ WRITE_LINE_MEMBER(peribox_device::senila) { for (int i=2; i <= 8; i++) { if (m_slot[i]!=NULL) m_slot[i]->senila(state); } } WRITE_LINE_MEMBER(peribox_device::senilb) { for (int i=2; i <= 8; i++) { if (m_slot[i]!=NULL) m_slot[i]->senilb(state); } } /* The Genmod modification is only of interest for the Geneve. It requires to modify the decoding of each single card. */ INPUT_CHANGED_MEMBER( peribox_device::genmod_changed ) { set_genmod(newval==1); } void peribox_device::set_genmod(bool set) { for (int i=2; i <= 8; i++) { if (m_slot[i]!=NULL) m_slot[i]->set_genmod(set); } } /* The INTA*, INTB*, and READY* lines are connected to each PEB card and are pulled up when inactive. If any card asserts the line (pulling down), the line state goes down. So we must keep a record which cards pull down the line. */ void peribox_device::inta_join(int slot, int state) { if (VERBOSE>7) LOG("Peribox propagating INTA from slot %d to console: %d\n", slot, state); if (state==ASSERT_LINE) m_inta_flag |= (1 << slot); else m_inta_flag &= ~(1 << slot); m_console_inta((m_inta_flag != 0)? ASSERT_LINE : CLEAR_LINE); } void peribox_device::intb_join(int slot, int state) { if (VERBOSE>7) LOG("Peribox propagating INTB from slot %d to console: %d\n", slot, state); if (state==ASSERT_LINE) m_intb_flag |= (1 << slot); else m_intb_flag &= ~(1 << slot); m_console_intb((m_intb_flag != 0)? ASSERT_LINE : CLEAR_LINE); } /* When any device pulls down READY, READY goes down. */ void peribox_device::ready_join(int slot, int state) { if (VERBOSE>7) LOG("peribox: Incoming READY=%d from slot %d\n", state, slot); // We store the inverse state if (state==CLEAR_LINE) m_ready_flag |= (1 << slot); else m_ready_flag &= ~(1 << slot); m_console_ready((m_ready_flag != 0)? CLEAR_LINE : ASSERT_LINE); } void peribox_device::set_slot_loaded(int slot, peribox_slot_device* slotdev) { if (VERBOSE>6) { if (slotdev!=NULL) LOG("Setting slot %d to device %s\n", slot, slotdev->tag()); else LOG("Setting slot %d to EMPTY\n", slot); } m_slot[slot] = slotdev; } void peribox_device::device_start(void) { if (VERBOSE>7) LOG("Peribox started\n"); floppy_drive_set_rpm(subdevice(FLOPPY_0), 300.); floppy_drive_set_rpm(subdevice(FLOPPY_1), 300.); floppy_drive_set_rpm(subdevice(FLOPPY_2), 300.); floppy_drive_set_rpm(subdevice(FLOPPY_3), 300.); } void peribox_device::device_config_complete() { // Resolve the callback lines to the console const peribox_config *intf = reinterpret_cast(static_config()); assert (intf != NULL); m_console_inta.resolve(intf->inta, *this); m_console_intb.resolve(intf->intb, *this); m_console_ready.resolve(intf->ready, *this); m_inta_flag = 0; m_intb_flag = 0; m_ready_flag = 0; // The TI-99/4(A) Flex Cable Interface (slot 1) pulls up the AMA/AMB/AMC lines to 1/1/1. m_address_prefix = intf->prefix; } SLOT_INTERFACE_START( peribox_slot ) SLOT_INTERFACE("32kmem", TI_32KMEM) SLOT_INTERFACE("myarcmem", TI99_MYARCMEM) SLOT_INTERFACE("samsmem", TI99_SAMSMEM) SLOT_INTERFACE("pcode", TI99_P_CODE) SLOT_INTERFACE("hsgpl", TI99_HSGPL) SLOT_INTERFACE("tirs232", TI99_RS232) SLOT_INTERFACE("speech", TI99_SPEECH) SLOT_INTERFACE("horizon", TI99_HORIZON) SLOT_INTERFACE_END SLOT_INTERFACE_START( peribox_slot6 ) SLOT_INTERFACE("ide", TI99_IDE) SLOT_INTERFACE("usbsm", TI99_USBSM) SLOT_INTERFACE("tirs232", TI99_RS232) SLOT_INTERFACE("speech", TI99_SPEECH) SLOT_INTERFACE_END SLOT_INTERFACE_START( peribox_slot7 ) SLOT_INTERFACE("ide", TI99_IDE) SLOT_INTERFACE("usbsm", TI99_USBSM) SLOT_INTERFACE("bwg", TI99_BWG) SLOT_INTERFACE("hfdc", TI99_HFDC) SLOT_INTERFACE_END SLOT_INTERFACE_START( peribox_slot8 ) SLOT_INTERFACE("tifdc", TI99_FDC) SLOT_INTERFACE("bwg", TI99_BWG) SLOT_INTERFACE("hfdc", TI99_HFDC) SLOT_INTERFACE_END MACHINE_CONFIG_FRAGMENT( peribox_device ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT2, peribox_slot ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT3, peribox_slot ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT4, peribox_slot ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT5, peribox_slot ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT6, peribox_slot6 ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT7, peribox_slot7 ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT8, peribox_slot8 ) MCFG_LEGACY_FLOPPY_4_DRIVES_ADD(ti99_4_floppy_interface) MCFG_MFMHD_3_DRIVES_ADD() MACHINE_CONFIG_END machine_config_constructor peribox_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( peribox_device ); } /**************************************************************************** A variant of the box used for the Geneve. *****************************************************************************/ peribox_gen_device::peribox_gen_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : peribox_device(mconfig, tag, owner, clock) { }; SLOT_INTERFACE_START( peribox_slotg ) SLOT_INTERFACE("memex", TI99_MEMEX) SLOT_INTERFACE("myarcmem", TI99_MYARCMEM) SLOT_INTERFACE("samsmem", TI99_SAMSMEM) SLOT_INTERFACE("pcode", TI99_P_CODE) SLOT_INTERFACE("tirs232", TI99_RS232) SLOT_INTERFACE("speech", TI99_SPEECH) SLOT_INTERFACE("horizon", TI99_HORIZON) SLOT_INTERFACE_END MACHINE_CONFIG_FRAGMENT( peribox_gen_device ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT2, peribox_slotg ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT3, peribox_slotg ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT4, peribox_slotg ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT5, peribox_slotg ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT6, peribox_slot6 ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT7, peribox_slot7 ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT8, peribox_slot8 ) MCFG_LEGACY_FLOPPY_4_DRIVES_ADD(ti99_4_floppy_interface) MCFG_MFMHD_3_DRIVES_ADD() MACHINE_CONFIG_END machine_config_constructor peribox_gen_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( peribox_gen_device ); } /**************************************************************************** A variant of the box used for the SGCPU (aka TI-99/4P). *****************************************************************************/ peribox_sg_device::peribox_sg_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : peribox_device(mconfig, tag, owner, clock) { }; SLOT_INTERFACE_START( peribox_slotp ) SLOT_INTERFACE("pcode", TI99_P_CODE) SLOT_INTERFACE("tirs232", TI99_RS232) SLOT_INTERFACE("speech", TI99_SPEECH) SLOT_INTERFACE("horizon", TI99_HORIZON) SLOT_INTERFACE_END SLOT_INTERFACE_START( peribox_ev_slot ) SLOT_INTERFACE("evpc", TI99_EVPC) SLOT_INTERFACE_END SLOT_INTERFACE_START( peribox_hs_slot ) SLOT_INTERFACE("hsgpl", TI99_HSGPL) SLOT_INTERFACE_END MACHINE_CONFIG_FRAGMENT( peribox_sg_device ) MCFG_PERIBOX_SLOT_ADD_DEF( PEBSLOT2, peribox_ev_slot, "evpc" ) MCFG_PERIBOX_SLOT_ADD_DEF( PEBSLOT3, peribox_hs_slot, "hsgpl" ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT4, peribox_slotp ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT5, peribox_slotp ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT6, peribox_slot6 ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT7, peribox_slot7 ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT8, peribox_slot7 ) MCFG_LEGACY_FLOPPY_4_DRIVES_ADD(ti99_4_floppy_interface) MCFG_MFMHD_3_DRIVES_ADD() MACHINE_CONFIG_END machine_config_constructor peribox_sg_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( peribox_sg_device ); } /**************************************************************************** Another variant of the box; used for the TI with EVPC. The EVPC is obviously required. *****************************************************************************/ peribox_ev_device::peribox_ev_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : peribox_device(mconfig, tag, owner, clock) { }; MACHINE_CONFIG_FRAGMENT( peribox_ev_device ) MCFG_PERIBOX_SLOT_ADD_DEF( PEBSLOT2, peribox_ev_slot, "evpc" ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT3, peribox_slot ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT4, peribox_slot ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT5, peribox_slot ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT6, peribox_slot6 ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT7, peribox_slot7 ) MCFG_PERIBOX_SLOT_ADD( PEBSLOT8, peribox_slot8 ) MCFG_LEGACY_FLOPPY_4_DRIVES_ADD(ti99_4_floppy_interface) MCFG_MFMHD_3_DRIVES_ADD() MACHINE_CONFIG_END machine_config_constructor peribox_ev_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( peribox_ev_device ); } /*************************************************************************** Floppy interface ****************************************************************************/ // TODO: won't be called unless motor_on is triggered WRITE_LINE_MEMBER( peribox_device::indexhole ) { if (VERBOSE>4) LOG("peribox_device: indexhole\n"); } /*************************************************************************** Implementation of a slot within the box. ****************************************************************************/ int peribox_slot_device::get_index_from_tagname() { const char *mytag = tag(); int maxlen = strlen(mytag); int i; for (i=maxlen-1; i >=0; i--) if (mytag[i] < 48 || mytag[i] > 57) break; return atoi(mytag+i+1); } peribox_slot_device::peribox_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : bus8z_device(mconfig, PERIBOX_SLOT, "TI P-Box slot", tag, owner, clock), device_slot_interface(mconfig, *this) { } READ8Z_MEMBER(peribox_slot_device::readz) { m_card->readz(space, offset, value, mem_mask); } WRITE8_MEMBER(peribox_slot_device::write) { m_card->write(space, offset, data, mem_mask); } void peribox_slot_device::crureadz(offs_t offset, UINT8 *value) { m_card->crureadz(offset, value); } void peribox_slot_device::cruwrite(offs_t offset, UINT8 data) { m_card->cruwrite(offset, data); } void peribox_slot_device::senila(int state) { m_card->set_senila(state); } void peribox_slot_device::senilb(int state) { m_card->set_senilb(state); } /* Genmod support */ void peribox_slot_device::set_genmod(bool set) { m_card->m_genmod = set; } void peribox_slot_device::device_start(void) { if (VERBOSE>7) LOG("Peribox slot started\n"); } void peribox_slot_device::device_config_complete() { m_slotnumber = get_index_from_tagname(); device_t *carddev = first_subdevice(); peribox_device *peb = static_cast(owner()); if (carddev != NULL) { peb->set_slot_loaded(m_slotnumber, this); m_card = static_cast(carddev); } else { peb->set_slot_loaded(m_slotnumber, NULL); m_card = NULL; } } /* Delivers the drives that are installed in the box. Called from a card. */ device_t* peribox_slot_device::get_drive(const char* name) { return owner()->subdevice(name); } /* These methods are called from the expansion cards. They add the slot number to identify the slot to the box. */ WRITE_LINE_MEMBER( peribox_slot_device::set_inta ) { peribox_device *peb = static_cast(owner()); peb->inta_join(m_slotnumber, state); } WRITE_LINE_MEMBER( peribox_slot_device::set_intb ) { peribox_device *peb = static_cast(owner()); peb->intb_join(m_slotnumber, state); } WRITE_LINE_MEMBER( peribox_slot_device::set_ready ) { peribox_device *peb = static_cast(owner()); peb->ready_join(m_slotnumber, state); } /***************************************************************************/ const device_type PERIBOX = &device_creator; const device_type PERIBOX_SLOT = &device_creator; const device_type PERIBOX_EV = &device_creator; const device_type PERIBOX_SG = &device_creator; const device_type PERIBOX_GEN = &device_creator;