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(nw) pimps : hooked up the uarts
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Robbbert
parent
03e6776950
commit
e52cfffebd
@ -6,74 +6,106 @@
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06/12/2009 Skeleton driver.
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No schematics or hardware info available.
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http://www.classiccmp.org/dunfield/pimps/index.htm
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Commands:
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A Assemble Code
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D Dump Memory
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E Enter the Text Editor
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F Full Duplex Host Operation
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G Go To
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H Half Duplex Host Operation
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M Memory
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P Port
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S Substitute
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T Transparent Mode
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U Usart Parameters for Host
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V Virtual Memory
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A xxxx xxxx - Assemble (from editor file): origin destination
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D xxxx,xxxx - Dump memory to host port
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E - Enter editor
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A - Append at end of file
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C - Clear memory file (reqires ESCAPE to confirm)
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D xx - Delete line number xx
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I xx - Insert at line xx
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L xx xx - List range of lines
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Q - Query: Display highest used address
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X - eXit editor (requires ESCAPE to confirm)
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$ xxxx xxxx - exit directly to assembler
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F - set for Full-duplex host operation
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G xxxx - Go (execute) at address
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H - set for Half-duplex host operation
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M xxxx,xxxx - Display a range of memory (hex dump)
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P xx xx-[xx.] - display/Edit I/O Port
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S xxxx - Substitute data into memory
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T - Transparent link to host (Ctrl-A exits)
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U - set host Uart parameters (8251 control registers)
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V - Virtual memory (Not used on PIMPS board)
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Notes:
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The 'D'ump command outputs memory to the host in some form of Intel
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HEX records, and waits for line-feed from the host before proceeding.
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The 'V'irtual memory function was to control an EPROM emulator which
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was part of the original design (see Chucks notes below) and was not
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used on the PIMPS board.
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Editor:
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Operates in HEXIDECIMAL line numbers. Only supports up to 256 lines
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(01-00). You must enter full two-digit number when prompted.
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You MUST 'C'lear the memory file before you begin, otherwise you will
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be editing random memory content.
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Assembler:
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Comment is an INSTRUCTION! - this means that you need to put at least
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one space before and after ';' when entering a line comment.
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Does not understand DECIMAL numbers. It understands character constants
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('c' and 'cc') and hex numbers ($xx or $xxxx).
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8-bit values MUST contain two hex digits or one quoted character. 16-bit
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constants MUST contain four hex digits or two quoted characters.
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Use 'S' instead if 'SP', eg: LXI S,$1000
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Only EQU, DB, DW and END directives are supported. An END statement is
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REQUIRED (otherwise you get the message '?tab-ful' as it fills the symbol
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table with garbage occuring in memory after the end of the file).
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RST instructions are implemented as 8 separate 'RST0'-'RST8' memonics.
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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 "machine/terminal.h"
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#include "machine/clock.h"
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#include "machine/i8251.h"
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#include "bus/rs232/rs232.h"
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#define TERMINAL_TAG "terminal"
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class pimps_state : public driver_device
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{
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public:
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pimps_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag),
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m_terminal(*this, TERMINAL_TAG),
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m_maincpu(*this, "maincpu")
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{
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}
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: driver_device(mconfig, type, tag)
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, m_maincpu(*this, "maincpu")
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, m_uart1(*this, "uart1")
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, m_uart2(*this, "uart2")
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{ }
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DECLARE_READ8_MEMBER(term_status_r);
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DECLARE_READ8_MEMBER(term_r);
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void kbd_put(u8 data);
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uint8_t m_term_data;
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DECLARE_WRITE_LINE_MEMBER( clock_tick );
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private:
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virtual void machine_reset() override;
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required_device<generic_terminal_device> m_terminal;
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required_device<cpu_device> m_maincpu;
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required_device<i8251_device> m_uart1;
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required_device<i8251_device> m_uart2;
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};
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// should be 8251 UART
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READ8_MEMBER( pimps_state::term_status_r )
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{
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return (m_term_data) ? 3 : 1;
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}
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READ8_MEMBER( pimps_state::term_r )
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{
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uint8_t ret = m_term_data;
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m_term_data = 0;
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return ret;
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}
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static ADDRESS_MAP_START(pimps_mem, AS_PROGRAM, 8, pimps_state)
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE(0x0000, 0xefff) AM_RAM
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AM_RANGE(0xf000, 0xffff) AM_ROM
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AM_RANGE(0xf000, 0xffff) AM_ROM AM_REGION("roms", 0)
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ADDRESS_MAP_END
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static ADDRESS_MAP_START(pimps_io, AS_IO, 8, pimps_state)
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE(0xf0, 0xf0) AM_READ(term_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
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AM_RANGE(0xf1, 0xf1) AM_READ(term_status_r)
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AM_RANGE(0xf0, 0xf0) AM_DEVREADWRITE("uart1", i8251_device, data_r, data_w)
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AM_RANGE(0xf1, 0xf1) AM_DEVREADWRITE("uart1", i8251_device, status_r, control_w)
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AM_RANGE(0xf2, 0xf2) AM_DEVREADWRITE("uart2", i8251_device, data_r, data_w)
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AM_RANGE(0xf3, 0xf3) AM_DEVREADWRITE("uart2", i8251_device, status_r, control_w)
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ADDRESS_MAP_END
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/* Input ports */
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@ -83,32 +115,64 @@ INPUT_PORTS_END
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void pimps_state::machine_reset()
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{
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m_term_data = 0;
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m_maincpu->set_pc(0xf000);
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}
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void pimps_state::kbd_put(u8 data)
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// source of baud frequency is not documented, so we invent a clock
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WRITE_LINE_MEMBER( pimps_state::clock_tick )
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{
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m_term_data = data;
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m_uart1->write_txc(state);
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m_uart1->write_rxc(state);
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}
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// baud is not documented, we will use 9600
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static DEVICE_INPUT_DEFAULTS_START( terminal ) // set up terminal to default to 9600, 7 bits, even parity
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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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static MACHINE_CONFIG_START( pimps )
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/* basic machine hardware */
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MCFG_CPU_ADD("maincpu",I8085A, XTAL_2MHz)
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MCFG_CPU_PROGRAM_MAP(pimps_mem)
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MCFG_CPU_IO_MAP(pimps_io)
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/* video hardware */
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MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0)
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MCFG_GENERIC_TERMINAL_KEYBOARD_CB(PUT(pimps_state, kbd_put))
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MCFG_DEVICE_ADD("uart_clock", CLOCK, 153600)
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MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE(pimps_state, clock_tick))
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MCFG_DEVICE_ADD("uart1", I8251, 0)
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MCFG_I8251_TXD_HANDLER(DEVWRITELINE("rs232a", rs232_port_device, write_txd))
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MCFG_I8251_DTR_HANDLER(DEVWRITELINE("rs232a", rs232_port_device, write_dtr))
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MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232a", rs232_port_device, write_rts))
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MCFG_RS232_PORT_ADD("rs232a", default_rs232_devices, "terminal")
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MCFG_RS232_RXD_HANDLER(DEVWRITELINE("uart1", i8251_device, write_rxd))
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MCFG_RS232_DSR_HANDLER(DEVWRITELINE("uart1", i8251_device, write_dsr))
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MCFG_RS232_CTS_HANDLER(DEVWRITELINE("uart1", i8251_device, write_cts))
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MCFG_DEVICE_CARD_DEVICE_INPUT_DEFAULTS("terminal", terminal) // must be exactly here
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MCFG_DEVICE_ADD("uart2", I8251, 0)
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MCFG_I8251_TXD_HANDLER(DEVWRITELINE("rs232b", rs232_port_device, write_txd))
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MCFG_I8251_DTR_HANDLER(DEVWRITELINE("rs232b", rs232_port_device, write_dtr))
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MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232b", rs232_port_device, write_rts))
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MCFG_RS232_PORT_ADD("rs232b", default_rs232_devices, nullptr)
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MCFG_RS232_RXD_HANDLER(DEVWRITELINE("uart2", i8251_device, write_rxd))
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MCFG_RS232_DSR_HANDLER(DEVWRITELINE("uart2", i8251_device, write_dsr))
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MCFG_RS232_CTS_HANDLER(DEVWRITELINE("uart2", i8251_device, write_cts))
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MACHINE_CONFIG_END
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/* ROM definition */
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ROM_START( pimps )
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ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
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ROM_LOAD( "pimps.bin", 0xf000, 0x1000, CRC(5da1898f) SHA1(d20e31d0981a1f54c83186dbdfcf4280e49970d0))
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ROM_REGION( 0x1000, "roms", ROMREGION_ERASEFF )
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ROM_LOAD( "pimps.bin", 0x0000, 0x1000, CRC(5da1898f) SHA1(d20e31d0981a1f54c83186dbdfcf4280e49970d0))
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ROM_END
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/* Driver */
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/* YEAR NAME PARENT COMPAT MACHINE INPUT STATE INIT COMPANY FULLNAME FLAGS */
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COMP( 197?, pimps, 0, 0, pimps, pimps, pimps_state, 0, "Henry Colford", "P.I.M.P.S.", MACHINE_NO_SOUND_HW)
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COMP( 197?, pimps, 0, 0, pimps, pimps, pimps_state, 0, "Henry Colford", "P.I.M.P.S.", MACHINE_NO_SOUND_HW) // terminal beeps
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