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imds2: PIO added, seems OK

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This commit is contained in:
fulivi 2015-04-09 12:22:11 +02:00
parent 4945071946
commit 5f5b432cc6
2 changed files with 63 additions and 3 deletions
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54
src/mess/drivers/imds2.c
View File

@ -63,7 +63,6 @@
// ICs that are not emulated yet are marked with "*"
//
// TODO:
// - Improve keyboard mapping
// - Emulate PIO. No known dumps of its ROM are available, though.
// - Emulate line printer output on PIO
// - Emulate serial channels on IPC
@ -101,6 +100,9 @@
// FDC oscillator of IOC board: 8 MHz
#define IOC_XTAL_Y1 XTAL_8MHz
// PIO oscillator: 6 MHz
#define IOC_XTAL_Y3 XTAL_6MHz
// Frequency of beeper
#define IOC_BEEP_FREQ 3300
@ -112,12 +114,13 @@ static ADDRESS_MAP_START(ipc_io_map , AS_IO , 8 , imds2_state)
ADDRESS_MAP_UNMAP_LOW
AM_RANGE(0xc0 , 0xc0) AM_READWRITE(imds2_ipc_dbbout_r , imds2_ipc_dbbin_data_w)
AM_RANGE(0xc1 , 0xc1) AM_READWRITE(imds2_ipc_status_r , imds2_ipc_dbbin_cmd_w)
AM_RANGE(0xf8 , 0xf9) AM_DEVREADWRITE("iocpio" , i8041_device , upi41_master_r , upi41_master_w)
AM_RANGE(0xfa , 0xfb) AM_READWRITE(imds2_ipclocpic_r , imds2_ipclocpic_w)
AM_RANGE(0xfc , 0xfd) AM_READWRITE(imds2_ipcsyspic_r , imds2_ipcsyspic_w)
AM_RANGE(0xff , 0xff) AM_WRITE(imds2_ipc_control_w)
ADDRESS_MAP_END
static ADDRESS_MAP_START(ioc_mem_map , AS_PROGRAM , 8 , imds2_state)
static ADDRESS_MAP_START(ioc_mem_map , AS_PROGRAM , 8 , imds2_state)
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000 , 0x1fff) AM_ROM
AM_RANGE(0x4000 , 0x5fff) AM_RAM
@ -143,6 +146,11 @@ static ADDRESS_MAP_START(ioc_io_map , AS_IO , 8 , imds2_state)
AM_RANGE(0xf0 , 0xf8) AM_DEVREADWRITE("iocdma" , i8257_device , read , write)
ADDRESS_MAP_END
static ADDRESS_MAP_START(pio_io_map , AS_IO , 8 , imds2_state)
AM_RANGE(MCS48_PORT_P1 , MCS48_PORT_P1) AM_READWRITE(imds2_pio_port_p1_r , imds2_pio_port_p1_w)
AM_RANGE(MCS48_PORT_P2 , MCS48_PORT_P2) AM_READWRITE(imds2_pio_port_p2_r , imds2_pio_port_p2_w)
ADDRESS_MAP_END
static ADDRESS_MAP_START(kb_io_map , AS_IO , 8 , imds2_state)
AM_RANGE(MCS48_PORT_P1 , MCS48_PORT_P1) AM_WRITE(imds2_kb_port_p1_w)
AM_RANGE(MCS48_PORT_P2 , MCS48_PORT_P2) AM_READ(imds2_kb_port_p2_r)
@ -161,6 +169,7 @@ imds2_state::imds2_state(const machine_config &mconfig, device_type type, const
m_iocbeep(*this , "iocbeep"),
m_ioctimer(*this , "ioctimer"),
m_iocfdc(*this , "iocfdc"),
m_iocpio(*this , "iocpio"),
m_kbcpu(*this , "kbcpu"),
m_palette(*this , "palette"),
m_gfxdecode(*this, "gfxdecode"),
@ -370,7 +379,7 @@ WRITE8_MEMBER(imds2_state::imds2_ioc_reset_f1_w)
READ8_MEMBER(imds2_state::imds2_ioc_status_r)
{
return (~m_ipc_ioc_status & 0x0f) | 0xf0;
return ~m_ipc_ioc_status;
}
READ8_MEMBER(imds2_state::imds2_ioc_dbbin_r)
@ -428,6 +437,31 @@ WRITE8_MEMBER(imds2_state::imds2_ioc_mem_w)
return prog_space.write_byte(offset , data);
}
READ8_MEMBER(imds2_state::imds2_pio_port_p1_r)
{
// TODO
return 0;
}
WRITE8_MEMBER(imds2_state::imds2_pio_port_p1_w)
{
m_pio_port1 = data;
imds2_update_printer();
}
READ8_MEMBER(imds2_state::imds2_pio_port_p2_r)
{
return m_pio_port2;
}
WRITE8_MEMBER(imds2_state::imds2_pio_port_p2_w)
{
m_pio_port2 = data;
imds2_update_printer();
// Send INTR to IPC
m_ipclocpic->ir5_w(BIT(data , 7));
}
I8275_DRAW_CHARACTER_MEMBER(imds2_state::crtc_display_pixels)
{
unsigned i;
@ -538,6 +572,11 @@ void imds2_state::imds2_update_beeper(void)
m_iocbeep->set_state(m_beeper_timer == 0 && BIT(m_miscout , 0) == 0);
}
void imds2_state::imds2_update_printer(void)
{
// TODO
}
static INPUT_PORTS_START(imds2)
// See [1], pg 56 for key matrix layout
// See [1], pg 57 for keyboard layout
@ -727,6 +766,10 @@ static MACHINE_CONFIG_START(imds2 , imds2_state)
MCFG_LEGACY_FLOPPY_DRIVE_ADD(FLOPPY_0, imds2_floppy_interface)
MCFG_CPU_ADD("iocpio" , I8041 , IOC_XTAL_Y3)
MCFG_CPU_IO_MAP(pio_io_map)
MCFG_QUANTUM_TIME(attotime::from_hz(100))
MCFG_CPU_ADD("kbcpu", I8741, XTAL_3_579545MHz) /* 3.579545 MHz */
MCFG_CPU_IO_MAP(kb_io_map)
MCFG_QUANTUM_TIME(attotime::from_hz(100))
@ -743,6 +786,11 @@ ROM_START(imds2)
ROM_LOAD("ioc_a51.bin" , 0x0800 , 0x0800 , CRC(6aa2f86c) SHA1(d3a5314d86e3366545b4c97b29e323dfab383d5f))
ROM_LOAD("ioc_a52.bin" , 0x1000 , 0x0800 , CRC(b88a38d5) SHA1(934716a1daec852f4d1f846510f42408df0c9584))
ROM_LOAD("ioc_a53.bin" , 0x1800 , 0x0800 , CRC(c8df4bb9) SHA1(2dfb921e94ae7033a7182457b2f00657674d1b77))
// ROM definition of PIO controller (8041A)
ROM_REGION(0x400 , "iocpio" , 0)
ROM_LOAD("pio_a72.bin" , 0 , 0x400 , CRC(c1eabf25))
// ROM definition of keyboard controller (8741)
ROM_REGION(0x400 , "kbcpu" , 0)
ROM_LOAD("kbd511.bin" , 0 , 0x400 , CRC(ba7c4303) SHA1(19899af732d0ae1247bfc79979b1ee5f339ee5cf))

12
src/mess/includes/imds2.h
View File

@ -53,6 +53,10 @@ class imds2_state : public driver_device
DECLARE_READ8_MEMBER(imds2_ioc_mem_r);
DECLARE_WRITE8_MEMBER(imds2_ioc_mem_w);
DECLARE_READ8_MEMBER(imds2_pio_port_p1_r);
DECLARE_WRITE8_MEMBER(imds2_pio_port_p1_w);
DECLARE_READ8_MEMBER(imds2_pio_port_p2_r);
DECLARE_WRITE8_MEMBER(imds2_pio_port_p2_w);
I8275_DRAW_CHARACTER_MEMBER(crtc_display_pixels);
@ -71,6 +75,7 @@ class imds2_state : public driver_device
required_device<beep_device> m_iocbeep;
required_device<pit8253_device> m_ioctimer;
required_device<i8271_device> m_iocfdc;
required_device<i8041_device> m_iocpio;
required_device<i8741_device> m_kbcpu;
required_device<palette_device> m_palette;
required_device<gfxdecode_device> m_gfxdecode;
@ -90,6 +95,7 @@ class imds2_state : public driver_device
bool imds2_in_ipc_rom(offs_t offset) const;
void imds2_update_beeper(void);
void imds2_update_printer(void);
// IPC control port
UINT8 m_ipc_control;
@ -117,6 +123,12 @@ class imds2_state : public driver_device
// IPC/IOC status
UINT8 m_ipc_ioc_status;
// PIO port 1
UINT8 m_pio_port1;
// PIO port 2
UINT8 m_pio_port2;
};
#endif /* _IMDS2_H_ */