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Merge pull request #5792 from JoakimLarsson/epc_4

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Workaround for #5776 and some minor cleanups/features
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Joakim Larsson Edström 2019-10-24 10:37:08 +02:00 committed by GitHub
commit 4a810c9080
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2 changed files with 55 additions and 28 deletions
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80
src/mame/drivers/eispc.cpp
View File

@ -21,13 +21,13 @@
* On board ports: Beeper,
* Ports: serial, parallel
* Internal Options: Up to 640K RAM through add-on RAM card
* Misc: The hardware was not 100% PC compatible so non BIOS based software would not run. 50.000+ units sold
* Misc: The hardware was not 100% PC compatible so non BIOS based software would not always run. 50.000+ units sold
*
* TODO:
* - Add keyboard, first HLE as in pc.cpp and then LLE when the keyboard controller is dumped
* - Add the on-board FDC and boot DOS 1.xx
* - Complete the Ericsson 1070 MDA ISA board and test all the graphics modes inclusing 640x400 (aka HR)
* TODO:s in selection
* - Complete the Ericsson 1070 MDA ISA board and test all the graphics modes including 640x400 (aka HR)
* - Add the Ericsson 1065 HDC and boot from a hard drive
* - Implement the descrete baudrate generator
* - Implement logic around enabling/resetting NMI and ISA bus I/O CHK
*
* Credits: The driver code is inspired from m24.cpp, myb3k.cpp and genpc.cpp. Information about the EPC has
* been contributed by many, mainly the people at Dalby Computer museum http://www.datormuseum.se/
@ -175,8 +175,8 @@ private:
DECLARE_WRITE_LINE_MEMBER(int_w);
uint8_t m_nmi_enabled;
uint8_t m_8087_int = 0;
const uint8_t m_parer_int = 0;
const uint8_t m_iochck_int = 0;
uint8_t m_parer_int = 0;
uint8_t m_iochck_int = 0;
void update_nmi();
// Timer
@ -185,6 +185,8 @@ private:
// Speaker
DECLARE_WRITE_LINE_MEMBER(speaker_ck_w);
required_device<speaker_sound_device> m_speaker;
bool m_pc4;
bool m_pc5;
void epc_map(address_map &map);
void epc_io(address_map &map);
@ -429,33 +431,53 @@ void epc_state::machine_start()
m_maincpu->space(AS_PROGRAM).install_ram(0, m_ram->size() - 1, m_ram->pointer());
std::fill_n(&m_dma_segment[0], 4, 0);
m_dma_active = 0;
m_tc = false;
m_int = 1;
m_txd = false;
m_rxrdy = false;
m_dreq0_ck = true;
m_rxtx_clk_state = 0;
save_item(NAME(m_dma_segment));
save_item(NAME(m_dma_active));
save_item(NAME(m_tc));
save_item(NAME(m_int));
save_item(NAME(m_txd));
save_item(NAME(m_rxrdy));
save_item(NAME(m_ocr));
m_ocr = 0x00;
save_item(NAME(m_ppi_portb));
save_item(NAME(m_int));
save_item(NAME(m_dreq0_ck));
save_item(NAME(m_ppi_portb));
save_item(NAME(m_rxtx_clk_state));
save_item(NAME(m_nmi_enabled));
save_item(NAME(m_8087_int));
save_item(NAME(m_parer_int));
save_item(NAME(m_iochck_int));
save_item(NAME(m_pc4));
save_item(NAME(m_pc5));
save_item(NAME(m_ocr));
save_item(NAME(m_irq));
save_item(NAME(m_drq));
save_item(NAME(m_fdc_irq));
save_item(NAME(m_fdc_drq));
}
void epc_state::machine_reset()
{
m_dma_active = 0;
m_tc = false;
m_txd = false;
m_rxrdy = false;
m_int = 1;
m_dreq0_ck = true;
m_ppi_portb = 0;
m_keyboard->rst_line_w(ASSERT_LINE);
m_rxtx_clk_state = 0;
m_nmi_enabled = 0;
m_kbd8251->write_cts(0); // Held low always
m_8087_int = 0;
m_parer_int = 0;
m_iochck_int = 0;
m_pc4 = 0;
m_pc5 = 0;
m_ocr = 0;
m_irq = 0;
m_drq = 0;
m_fdc_irq = 0;
m_fdc_drq = 0;
m_keyboard->rst_line_w(ASSERT_LINE);
m_kbd8251->write_cts(0); // Tied to GND
}
void epc_state::init_epc()
@ -550,7 +572,9 @@ WRITE_LINE_MEMBER(epc_state::dreq0_ck_w)
WRITE_LINE_MEMBER(epc_state::speaker_ck_w)
{
m_speaker->level_w((m_ppi_portb & 0x02) && state ? 1 : 0);
m_pc5 = state;
m_pc4 = (m_ppi_portb & 0x02) && state ? 1 : 0;
m_speaker->level_w(m_pc4);
}
/**********************************************************
@ -614,7 +638,8 @@ READ8_MEMBER( epc_state::ppi_portc_r )
// Read 4 configurations dip switches depending on PB3
data = (m_io_dsw->read() >> ((m_ppi_portb & 0x08) ? 4 : 0) & 0x0f);
// TODO: verify what PC4-PC7 is used for, if anything
data |= (m_pc4 ? 1U << 4 : 0); // Feedback from gated speaker beep
data |= (m_pc5 ? 1U << 5 : 0); // Feedback from timer source for speaker beep
LOGPPI("PPI Port C read: %02x\n", data);
@ -785,7 +810,7 @@ void epc_state::epc(machine_config &config)
ISA8(config, m_isabus, XTAL(14'318'181) / 3.0); // TEW crystal marked X1 verified
m_isabus->set_memspace(m_maincpu, AS_PROGRAM);
m_isabus->set_iospace(m_maincpu, AS_IO);
//m_isabus->irq2_callback().set(m_pic8259, FUNC(pic8259_device::ir2_w)); // Reserved in service manual
m_isabus->irq2_callback().set(m_pic8259, FUNC(pic8259_device::ir2_w)); // Reserved in service manual
m_isabus->irq3_callback().set(m_pic8259, FUNC(pic8259_device::ir3_w));
m_isabus->irq4_callback().set(m_pic8259, FUNC(pic8259_device::ir4_w));
m_isabus->irq5_callback().set(m_pic8259, FUNC(pic8259_device::ir5_w));
@ -794,7 +819,6 @@ void epc_state::epc(machine_config &config)
m_isabus->drq1_callback().set(m_dma8237a, FUNC(am9517a_device::dreq1_w));
m_isabus->drq2_callback().set(m_dma8237a, FUNC(am9517a_device::dreq2_w));
m_isabus->drq3_callback().set(m_dma8237a, FUNC(am9517a_device::dreq3_w));
//m_isabus->iochck_callback().set(FUNC(epc_state::chck_w)); // TODO: Check schematics
m_isabus->iochck_callback().set([this] (int state)
{
if (m_nmi_enabled && !state && 0)
@ -814,8 +838,10 @@ void epc_state::epc(machine_config &config)
// System board has 128kB memory with parity, expansion can be achieved through the
// 128kB Memory Expansion Board 1090 and/or the 128kB Multifunction Board MB1080-001
// and/or the 384kB MB1080-002. The MB1080 DRAM might need to be dynamically added as
// base address and also a video memory hole is configuarable.
RAM(config, m_ram).set_default_size("128K").set_extra_options("256K, 384K, 512K, 640K");
// base address and also a video memory hole is configurable.
// Some RAM sizes are disabled because they trigger issue #5776, just until that is sorted out
//RAM(config, m_ram).set_default_size("128K").set_extra_options("256K, 384K, 512K, 640K");
RAM(config, m_ram).set_default_size("128K").set_extra_options("384K");
// FDC
I8272A(config, m_fdc, XTAL(16'000'000) / 2, false); // TEW crystal marked X3 verified
@ -853,7 +879,7 @@ void epc_state::update_nmi()
(m_parer_int != 0) || // Parity error is always false as it is an emulator, at least for now
(m_iochck_int != 0))) // Same goes for ISA board errors
{
LOGNMI(" NMI asserted\n");
LOGNMI(" NMI Asserted\n");
m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
}
else

3
src/mame/machine/eispc_kb.cpp
View File

@ -267,6 +267,7 @@ WRITE_LINE_MEMBER(eispc_keyboard_device::hold_w)
m_hold = CLEAR_LINE == state;
}
// TODO: Fix proper HOLD of reset line for MCU until released by hist CPU
WRITE_LINE_MEMBER(eispc_keyboard_device::rst_line_w)
{
if (state == CLEAR_LINE)
@ -278,7 +279,7 @@ WRITE_LINE_MEMBER(eispc_keyboard_device::rst_line_w)
else
{
// set_input_line suspends with a true argument which causes "Keyboard error"
m_mcu->suspend(SUSPEND_REASON_RESET, false);
m_mcu->suspend(SUSPEND_REASON_RESET, false); // This causes an assert later when DEBUG==1
//m_mcu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE);
LOGRST("KBD: Keyboard mcu reset line is asserted\n");
}