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nokia/mikromik: Implemented SASI bus interface. [Curt Coder]

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This commit is contained in:
Curt Coder 2024-05-04 13:43:48 +03:00
parent d4e47cf7df
commit be02f7040e
2 changed files with 132 additions and 10 deletions
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132
src/mame/nokia/mikromik.cpp
View File

@ -50,16 +50,19 @@
M6G: 2x 640KB floppy + GDC
M7G: 1x 640KB floppy + 5MB hard disk + GDC
./chdman createhd -chs 306,2,32 -ss 256 -o st406.chd
*/
/*
TODO:
- M7 boot floppy
- accurate video timing
- PCB layouts
- NEC uPD7201 MPSC
- model M7 5MB hard disk
*/
@ -191,28 +194,128 @@ void mm1_state::switch_w(int state)
if (m_switch)
{
// winchester
m_io->space().install_readwrite_handler(0x50, 0x50, read8sm_delegate(*this, FUNC(mm1_state::sasi_status_r)), write8sm_delegate(*this, FUNC(mm1_state::sasi_cmd_w)));
m_io->space().install_readwrite_handler(0x51, 0x51, emu::rw_delegate(*m_sasi, FUNC(nscsi_callback_device::read)), emu::rw_delegate(*m_sasi, FUNC(nscsi_callback_device::write)));
m_io->space().install_readwrite_handler(0x51, 0x51, emu::rw_delegate(*this, FUNC(mm1_state::sasi_data_r)), write8sm_delegate(*this, FUNC(mm1_state::sasi_data_w)));
}
else
{
// floppy
m_io->space().install_device(0x50, 0x51, *m_fdc, &upd765a_device::map);
}
m_floppy[0]->mon_w(state);
}
uint8_t mm1_state::sasi_status_r(offs_t offset)
{
LOG("SASI STATUS\n");
return 0xff;
uint8_t data = 0;
data |= m_sasi->bsy_r();
data |= m_sasi->msg_r() << 2;
data |= m_sasi->cd_r() << 3;
data |= m_sasi->req_r() << 4;
data |= m_sasi->io_r() << 5;
//LOG("%s SASI STATUS %02x\n",machine().describe_context(),data);
return data;
}
void mm1_state::sasi_cmd_w(offs_t offset, uint8_t data)
{
LOG("SASI CMD %02x\n", data);
LOG("%s SASI CMD %02x\n", machine().describe_context(), data);
m_sasi->sel_w(BIT(data, 0));
m_sasi->rst_w(BIT(data, 1));
}
uint8_t mm1_state::sasi_data_r(offs_t offset)
{
uint8_t data = m_sasi->read();
LOG("%s SASI DATA R %02x\n", machine().describe_context(), data);
if (m_sasi->req_r())
{
m_sasi->ack_w(1);
}
return data;
}
void mm1_state::sasi_data_w(offs_t offset, uint8_t data)
{
m_sasi_data = data;
if (!m_sasi->io_r())
{
m_sasi->write(data);
}
LOG("%s SASI DATA W %02x\n", machine().describe_context(), data);
if (m_sasi->req_r())
{
m_sasi->ack_w(1);
}
}
uint8_t mm1_state::sasi_ior3_r(offs_t offset)
{
uint8_t data = 0;
if (m_switch)
{
data = sasi_data_r(0);
}
else
{
data = m_fdc->dma_r();
}
return data;
}
void mm1_state::sasi_iow3_w(offs_t offset, uint8_t data)
{
if (m_switch)
{
sasi_data_w(0, data);
}
else
{
m_fdc->dma_w(data);
}
}
void mm1_state::sasi_bsy_w(int state)
{
if (state)
{
m_sasi->sel_w(0);
}
}
void mm1_state::sasi_req_w(int state)
{
if (!state)
{
m_sasi->ack_w(0);
}
m_dmac->dreq3_w(state);
}
void mm1_state::sasi_io_w(int state)
{
if (state)
{
m_sasi->write(0);
}
else
{
m_sasi->write(m_sasi_data);
}
}
//**************************************************************************
@ -406,6 +509,7 @@ void mm1_state::machine_start()
save_item(NAME(m_tc));
save_item(NAME(m_fdc_tc));
save_item(NAME(m_switch));
save_item(NAME(m_sasi_data));
}
@ -548,9 +652,17 @@ void mm1_state::mm1_640k_winchester(machine_config &config)
NSCSI_BUS(config, "sasi");
NSCSI_CONNECTOR(config, "sasi:0", default_scsi_devices, "s1410");
NSCSI_CONNECTOR(config, "sasi:7", default_scsi_devices, "scsicb", true)
.option_add_internal("scsicb", NSCSI_CB);
.option_add_internal("scsicb", NSCSI_CB)
.machine_config([this](device_t* device) {
downcast<nscsi_callback_device&>(*device).bsy_callback().set(*this, FUNC(mm1_state::sasi_bsy_w));
downcast<nscsi_callback_device&>(*device).req_callback().set(*this, FUNC(mm1_state::sasi_req_w));
downcast<nscsi_callback_device&>(*device).io_callback().set(*this, FUNC(mm1_state::sasi_io_w));
});
m_outlatch->q_out_cb<7>().set(FUNC(mm1_state::switch_w));
m_dmac->in_ior_callback<3>().set(*this, FUNC(mm1_state::sasi_ior3_r));
m_dmac->out_iow_callback<3>().set(*this, FUNC(mm1_state::sasi_iow3_w));
}
void mm1_state::mm1m7(machine_config &config)
@ -635,5 +747,5 @@ COMP( 1981, mm1m4, 0, 0, mm1m4, mm1, mm1_state, empty_init, "Nokia
COMP( 1981, mm1m4g, mm1m4, 0, mm1m4g, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M4G", MACHINE_SUPPORTS_SAVE )
COMP( 1981, mm1m6, 0, 0, mm1m6, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M6", MACHINE_SUPPORTS_SAVE )
COMP( 1981, mm1m6g, mm1m6, 0, mm1m6g, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M6G", MACHINE_SUPPORTS_SAVE )
COMP( 1981, mm1m7, 0, 0, mm1m7, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M7", MACHINE_NOT_WORKING )
COMP( 1981, mm1m7g, mm1m7, 0, mm1m7g, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M7G", MACHINE_NOT_WORKING )
COMP( 1981, mm1m7, 0, 0, mm1m7, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M7", MACHINE_SUPPORTS_SAVE )
COMP( 1981, mm1m7g, mm1m7, 0, mm1m7g, mm1, mm1_state, empty_init, "Nokia Data", "MikroMikko 1 M7G", MACHINE_SUPPORTS_SAVE )

10
src/mame/nokia/mikromik.h
View File

@ -134,7 +134,10 @@ private:
bool m_dack3;
bool m_tc;
bool m_fdc_tc;
// SASI state
bool m_switch;
uint8_t m_sasi_data;
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
@ -151,6 +154,13 @@ private:
void switch_w(int state);
uint8_t sasi_status_r(offs_t offset);
void sasi_cmd_w(offs_t offset, uint8_t data);
uint8_t sasi_data_r(offs_t offset);
void sasi_data_w(offs_t offset, uint8_t data);
uint8_t sasi_ior3_r(offs_t offset);
void sasi_iow3_w(offs_t offset, uint8_t data);
void sasi_bsy_w(int state);
void sasi_req_w(int state);
void sasi_io_w(int state);
void dma_hrq_w(int state);
uint8_t mpsc_dack_r();
void mpsc_dack_w(uint8_t data);