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https://github.com/holub/mame
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New machines marked as NOT_WORKING
---------------------------------- Space Byte 8085 [AJR, S100Computers.com]
This commit is contained in:
AJR
parent
d1e92898e4
commit
c968f79282
@ -4035,6 +4035,7 @@ files {
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MAME_DIR .. "src/mame/drivers/rvoice.cpp",
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MAME_DIR .. "src/mame/drivers/sacstate.cpp",
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MAME_DIR .. "src/mame/drivers/sartorius.cpp",
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MAME_DIR .. "src/mame/drivers/sb8085.cpp",
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MAME_DIR .. "src/mame/drivers/sbrain.cpp",
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MAME_DIR .. "src/mame/drivers/seattlecmp.cpp",
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MAME_DIR .. "src/mame/drivers/sh4robot.cpp",
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312
src/mame/drivers/sb8085.cpp
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312
src/mame/drivers/sb8085.cpp
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@ -0,0 +1,312 @@
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// license:BSD-3-Clause
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// copyright-holders:AJR
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/***************************************************************************
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Preliminary driver for Space Byte 8085 CPU.
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This is an early Intel 8085-based single-board computer whose onboard
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I/O consists of RS232 ports for a CRT and serial printer and a parallel
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interface intended for use with ICOM's FD 3700 or Frugal Floppy disk
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controller. The resident monitor program also supports the Tarbell
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cassette tape interface and the PolyMorphic Systems Video Terminal
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Interface.
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The bus connector is only somewhat S-100 compatible. Anticipating the
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draft IEEE standard, no clock signal is placed on pin 25 or 49 (though
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documentation recommends jumpering pin 49 to the 3.072 MHz clock on pin
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24 for the VTI). The conventional INT and VI0-7 pins are disregarded in
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favor of collecting the four 8085-specific interrupts on pins 12-15 in
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ascending order of priority. SDSB/CDSB/ASDB/DODSB are also disregarded,
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and there is an alternate PHOLD input on pin 16.
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Space Byte also advertised a 16K static RAM board and a 2708/2716
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EPROM programmer for use in this system.
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***************************************************************************/
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#include "emu.h"
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#include "cpu/i8085/i8085.h"
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#include "bus/rs232/rs232.h"
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#include "bus/s100/s100.h"
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#include "bus/s100/polyvti.h"
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#include "bus/s100/seals8k.h"
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#include "machine/i8155.h"
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#include "machine/i8251.h"
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class sb8085_state : public driver_device
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{
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public:
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sb8085_state(const machine_config &config, device_type type, const char *tag)
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: driver_device(config, type, tag)
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, m_maincpu(*this, "maincpu")
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, m_i8155(*this, "i8155")
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, m_usart(*this, "usart")
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, m_crt(*this, "crt")
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, m_printer(*this, "printer")
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, m_s100(*this, "s100")
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, m_program(*this, "program")
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, m_config_select(*this, "SELECT")
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, m_portd(*this, "PORTD")
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{
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}
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static constexpr feature_type unemulated_features() { return feature::DISK | feature::TAPE; }
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void sb8085(machine_config &config);
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protected:
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virtual void machine_start() override;
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virtual void machine_reset() override;
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private:
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bool board_selected(offs_t offset);
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u8 mem_r(offs_t offset);
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void mem_w(offs_t offset, u8 data);
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u8 in_r(offs_t offset);
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void out_w(offs_t offset, u8 data);
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DECLARE_WRITE_LINE_MEMBER(phantom_disable_w);
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DECLARE_WRITE_LINE_MEMBER(printer_select_w);
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DECLARE_WRITE_LINE_MEMBER(usart_txd_w);
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DECLARE_WRITE_LINE_MEMBER(crt_rts_w);
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DECLARE_WRITE_LINE_MEMBER(printer_rts_w);
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void mem_map(address_map &map);
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void io_map(address_map &map);
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required_device<i8085a_cpu_device> m_maincpu;
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required_device<i8155_device> m_i8155;
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required_device<i8251_device> m_usart;
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required_device<rs232_port_device> m_crt;
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required_device<rs232_port_device> m_printer;
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required_device<s100_bus_device> m_s100;
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required_region_ptr<u8> m_program;
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required_ioport m_config_select;
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required_ioport m_portd;
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bool m_phantom;
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bool m_printer_select;
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bool m_usart_txd;
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bool m_crt_rts;
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bool m_printer_rts;
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};
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void sb8085_state::machine_start()
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{
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m_printer_select = false;
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m_usart_txd = true;
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m_crt_rts = true;
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m_printer_rts = true;
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// Pins 6, 8, 5 (printer) are tied to +12
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m_crt->write_dtr(0);
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m_printer->write_rts(0);
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m_printer->write_dtr(0);
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save_item(NAME(m_phantom));
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save_item(NAME(m_printer_select));
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save_item(NAME(m_usart_txd));
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save_item(NAME(m_crt_rts));
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save_item(NAME(m_printer_rts));
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}
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void sb8085_state::machine_reset()
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{
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m_phantom = false;
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}
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bool sb8085_state::board_selected(offs_t offset)
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{
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if (!m_phantom)
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return true;
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ioport_value config = m_config_select->read();
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return !BIT(config, 1) || (offset & 0xe000) == (BIT(config, 0) ? 0xe000 : 0xc000);
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}
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u8 sb8085_state::mem_r(offs_t offset)
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{
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if (board_selected(offset))
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{
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if ((offset & 0x1c00) < 0x0c00)
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return m_program[offset & 0xfff];
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else if ((offset & 0x1c00) >= 0x1800)
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return m_i8155->memory_r(offset & 0xff);
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else
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return 0xff;
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}
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else
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return m_s100->smemr_r(offset);
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}
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void sb8085_state::mem_w(offs_t offset, u8 data)
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{
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if (board_selected(offset))
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{
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if ((offset & 0x1c00) >= 0x1800)
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m_i8155->memory_w(offset & 0xff, data);
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}
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else
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m_s100->mwrt_w(offset, data);
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}
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u8 sb8085_state::in_r(offs_t offset)
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{
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offset |= offset << 8;
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if (board_selected(offset))
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{
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if ((offset & 0x1c00) == 0x0000)
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return m_usart->read(BIT(offset, 8));
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else if ((offset & 0x1c00) == 0x0c00)
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return m_portd->read() ^ 0xff;
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else if ((offset & 0x1c00) >= 0x1800)
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return m_i8155->io_r(offset & 7);
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else
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return 0xff;
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}
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else
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return m_s100->sinp_r(offset);
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}
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void sb8085_state::out_w(offs_t offset, u8 data)
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{
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offset |= offset << 8;
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if (board_selected(offset))
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{
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if ((offset & 0x1c00) == 0x0000)
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m_usart->write(BIT(offset, 8), data);
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else if ((offset & 0x1c00) >= 0x1800)
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m_i8155->io_w(offset & 7, data);
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}
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else
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m_s100->sout_w(offset, data);
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}
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WRITE_LINE_MEMBER(sb8085_state::phantom_disable_w)
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{
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if (!state)
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m_phantom = true;
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}
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WRITE_LINE_MEMBER(sb8085_state::printer_select_w)
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{
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if (state && m_printer_select)
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{
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m_printer_select = false;
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m_crt->write_txd(m_usart_txd);
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m_printer->write_txd(1);
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m_usart->write_cts(m_crt_rts);
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}
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else if (!state && !m_printer_select)
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{
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m_printer_select = true;
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m_crt->write_txd(1);
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m_printer->write_txd(m_usart_txd);
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m_usart->write_cts(m_printer_rts);
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}
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}
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WRITE_LINE_MEMBER(sb8085_state::usart_txd_w)
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{
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m_usart_txd = state;
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if (m_printer_select)
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m_printer->write_txd(state);
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else
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m_crt->write_txd(state);
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}
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WRITE_LINE_MEMBER(sb8085_state::crt_rts_w)
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{
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m_crt_rts = state;
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if (!m_printer_select)
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m_usart->write_cts(state);
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}
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WRITE_LINE_MEMBER(sb8085_state::printer_rts_w)
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{
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m_printer_rts = state;
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if (m_printer_select)
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m_usart->write_cts(state);
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}
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void sb8085_state::mem_map(address_map &map)
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{
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map(0x0000, 0xffff).rw(FUNC(sb8085_state::mem_r), FUNC(sb8085_state::mem_w));
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}
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void sb8085_state::io_map(address_map &map)
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{
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map(0x00, 0xff).rw(FUNC(sb8085_state::in_r), FUNC(sb8085_state::out_w));
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}
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INPUT_PORTS_START(sb8085)
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PORT_START("SELECT")
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PORT_CONFNAME(3, 2, "Board select")
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PORT_CONFSETTING(0, "Single board")
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PORT_CONFSETTING(2, "C000-DFFFH")
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PORT_CONFSETTING(3, "E000-FFFFH")
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PORT_START("PORTD")
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PORT_BIT(0xff, IP_ACTIVE_LOW, IPT_UNKNOWN) // from disk connector
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INPUT_PORTS_END
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static void sb8085_s100_devices(device_slot_interface &device)
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{
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device.option_add("vti", S100_POLY_VTI);
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device.option_add("8ksc", S100_8K_SC);
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device.option_add("8kscbb", S100_8K_SC_BB);
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}
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static DEVICE_INPUT_DEFAULTS_START(terminal)
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DEVICE_INPUT_DEFAULTS("RS232_RXBAUD", 0xff, RS232_BAUD_9600)
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DEVICE_INPUT_DEFAULTS("RS232_TXBAUD", 0xff, RS232_BAUD_9600)
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DEVICE_INPUT_DEFAULTS("RS232_STARTBITS", 0xff, RS232_STARTBITS_1)
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DEVICE_INPUT_DEFAULTS("RS232_DATABITS", 0xff, RS232_DATABITS_7)
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DEVICE_INPUT_DEFAULTS("RS232_PARITY", 0xff, RS232_PARITY_EVEN)
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DEVICE_INPUT_DEFAULTS("RS232_STOPBITS", 0xff, RS232_STOPBITS_2)
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DEVICE_INPUT_DEFAULTS_END
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void sb8085_state::sb8085(machine_config &config)
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{
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I8085A(config, m_maincpu, 6.144_MHz_XTAL);
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m_maincpu->set_addrmap(AS_PROGRAM, &sb8085_state::mem_map);
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m_maincpu->set_addrmap(AS_IO, &sb8085_state::io_map);
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m_maincpu->in_sid_func().set(m_crt, FUNC(rs232_port_device::rxd_r));
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I8155(config, m_i8155, 6.144_MHz_XTAL / 2);
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m_i8155->out_pc_callback().set(FUNC(sb8085_state::phantom_disable_w)).bit(5);
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m_i8155->out_to_callback().set(m_usart, FUNC(i8251_device::write_txc));
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m_i8155->out_to_callback().append(m_usart, FUNC(i8251_device::write_rxc));
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I8251(config, m_usart, 6.144_MHz_XTAL / 2);
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m_usart->rts_handler().set(m_crt, FUNC(rs232_port_device::write_rts));
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m_usart->txd_handler().set(FUNC(sb8085_state::usart_txd_w));
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m_usart->dtr_handler().set(FUNC(sb8085_state::printer_select_w));
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RS232_PORT(config, m_crt, default_rs232_devices, nullptr);
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m_crt->rxd_handler().set(m_usart, FUNC(i8251_device::write_rxd));
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m_crt->cts_handler().set(FUNC(sb8085_state::crt_rts_w));
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m_crt->set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal));
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RS232_PORT(config, m_printer, default_rs232_devices, nullptr);
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m_printer->cts_handler().set(FUNC(sb8085_state::printer_rts_w));
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S100_BUS(config, m_s100, 6.144_MHz_XTAL / 2);
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S100_SLOT(config, "s100:1", sb8085_s100_devices, "vti");
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S100_SLOT(config, "s100:2", sb8085_s100_devices, nullptr);
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S100_SLOT(config, "s100:3", sb8085_s100_devices, nullptr);
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S100_SLOT(config, "s100:4", sb8085_s100_devices, nullptr);
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}
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ROM_START(sb8085)
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ROM_REGION(0xc00, "program", 0)
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// From manual listing titled "SPACE BYTE 8085 PROM MONITOR 11-14-77" to be programmed on 3 TMS2708JL
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ROM_LOAD("1.u19", 0x000, 0x400, CRC(9e1f11dd) SHA1(4c4482baa133dd6d437aaf749e31b72c9718eb97))
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ROM_LOAD("2.u20", 0x400, 0x400, CRC(2426af98) SHA1(b6e37041f997aeea13be79df10dc410f4b0c51a6))
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ROM_LOAD("3.u21", 0x800, 0x400, CRC(088ad01b) SHA1(6832e63dc1769db09107bc09f4c2cfb158dd8d33))
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ROM_END
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COMP(1977, sb8085, 0, 0, sb8085, sb8085, sb8085_state, empty_init, "Space Byte", "Space Byte 8085", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW)
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@ -34383,6 +34383,9 @@ savia84 //
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@source:savquest.cpp
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savquest //
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@source:sb8085.cpp
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sb8085 //
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@source:sbasketb.cpp
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sbasketb // GX405 (c) 1984 (Version I, Encrypted)
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sbaskete // GX405 (c) 1984 (Version E, Encrypted)
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@ -702,6 +702,7 @@ sapi1.cpp
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sartorius.cpp
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saturn.cpp
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savia84.cpp
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sb8085.cpp
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sbc6510.cpp
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sbrain.cpp
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sc2.cpp
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Block a user