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lbpc: Add keyboard interface

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This commit is contained in:
AJR 2020-12-22 20:01:18 -05:00
parent a93c606377
commit a58ecc28ee
2 changed files with 93 additions and 1 deletions
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2
src/devices/video/crtc_ega.cpp
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@ -13,7 +13,7 @@
#include "screen.h"
#define VERBOSE 1
#define VERBOSE 0
#include "logmacro.h"

92
src/mame/drivers/lbpc.cpp
View File

@ -17,6 +17,8 @@
#include "bus/isa/isa.h"
#include "bus/isa/isa_cards.h"
#include "bus/nscsi/devices.h"
#include "bus/pc_kbd/keyboards.h"
#include "bus/pc_kbd/pc_kbdc.h"
#include "bus/rs232/rs232.h"
#include "cpu/nec/v5x.h"
#include "formats/pc_dsk.h"
@ -28,6 +30,9 @@
#include "softlist_dev.h"
#include "speaker.h"
#define VERBOSE 0
#include "logmacro.h"
class lbpc_state : public driver_device
{
public:
@ -37,11 +42,16 @@ public:
, m_expbus(*this, "expbus")
, m_fdc(*this, "fdc")
, m_scsic(*this, "scsi:7:ncr")
, m_kbd(*this, "kbd")
, m_speaker(*this, "speaker")
, m_dma_channel(0xff)
, m_eop_active(false)
, m_port61(0xff)
, m_speaker_data(false)
, m_kbd_clock(true)
, m_kbd_data(true)
, m_kbd_irq(false)
, m_kbd_input(0xff)
{
}
@ -59,6 +69,11 @@ private:
DECLARE_WRITE_LINE_MEMBER(iochck_w);
template <int Line> DECLARE_WRITE_LINE_MEMBER(dmaak_w);
DECLARE_WRITE_LINE_MEMBER(eop_w);
void keyboard_shift_in();
DECLARE_WRITE_LINE_MEMBER(kbd_clock_w);
DECLARE_WRITE_LINE_MEMBER(kbd_data_w);
u8 keyboard_r();
u8 port61_r();
void port61_w(u8 data);
u8 port62_r();
@ -73,12 +88,17 @@ private:
required_device<isa8_device> m_expbus;
required_device<wd37c65c_device> m_fdc;
required_device<ncr53c80_device> m_scsic;
required_device<pc_kbdc_device> m_kbd;
required_device<speaker_sound_device> m_speaker;
u8 m_dma_channel;
bool m_eop_active;
u8 m_port61;
bool m_speaker_data;
bool m_kbd_clock;
bool m_kbd_data;
bool m_kbd_irq;
u8 m_kbd_input;
};
@ -88,6 +108,9 @@ void lbpc_state::machine_start()
save_item(NAME(m_eop_active));
save_item(NAME(m_port61));
save_item(NAME(m_speaker_data));
save_item(NAME(m_kbd_clock));
save_item(NAME(m_kbd_irq));
save_item(NAME(m_kbd_input));
}
void lbpc_state::machine_reset()
@ -154,6 +177,44 @@ WRITE_LINE_MEMBER(lbpc_state::eop_w)
}
}
void lbpc_state::keyboard_shift_in()
{
if (BIT(m_port61, 7) || m_kbd_irq)
return;
if (BIT(m_kbd_input, 0))
{
m_kbd_irq = true;
m_maincpu->set_input_line(INPUT_LINE_IRQ1, 1);
}
m_kbd_input >>= 1;
if (m_kbd_data)
{
m_kbd_input |= 0x80;
LOG("%s: Shifting in 1 bit (%02X)\n", machine().describe_context(), m_kbd_input);
}
else
LOG("%s: Shifting in 0 bit (%02X)\n", machine().describe_context(), m_kbd_input);
}
WRITE_LINE_MEMBER(lbpc_state::kbd_clock_w)
{
if (m_kbd_clock && !state)
keyboard_shift_in();
m_kbd_clock = state;
}
WRITE_LINE_MEMBER(lbpc_state::kbd_data_w)
{
m_kbd_data = state;
}
u8 lbpc_state::keyboard_r()
{
return m_kbd_input;
}
u8 lbpc_state::port61_r()
{
return m_port61;
@ -167,6 +228,32 @@ void lbpc_state::port61_w(u8 data)
m_speaker->level_w(m_speaker_data);
m_maincpu->tctl2_w(BIT(data, 0));
if (BIT(m_port61, 3) != BIT(data, 3))
{
LOG("%s: PB3 changed to %d\n", machine().describe_context(), BIT(data, 3));
m_kbd->data_write_from_mb(BIT(data, 3));
}
if (BIT(m_port61, 6) != BIT(data, 6))
{
LOG("%s: PB6 changed to %d\n", machine().describe_context(), BIT(data, 6));
m_kbd->clock_write_from_mb(BIT(data, 6));
}
if (BIT(m_port61, 7) != BIT(data, 7))
{
LOG("%s: PB7 changed to %d\n", machine().describe_context(), BIT(data, 7));
if (BIT(data, 7))
{
m_kbd_input = 0;
if (m_kbd_irq)
{
m_kbd_irq = false;
m_maincpu->set_input_line(INPUT_LINE_IRQ1, 0);
}
}
}
if (BIT(m_port61, 2) != BIT(data, 2))
LOG("%s: PB2 changed to %d\n", machine().describe_context(), BIT(data, 2));
m_port61 = data;
}
@ -198,6 +285,7 @@ void lbpc_state::mem_map(address_map &map)
void lbpc_state::io_map(address_map &map)
{
map(0x0060, 0x0060).r(FUNC(lbpc_state::keyboard_r));
map(0x0061, 0x0061).rw(FUNC(lbpc_state::port61_r), FUNC(lbpc_state::port61_w));
map(0x0062, 0x0062).r(FUNC(lbpc_state::port62_r));
map(0x0330, 0x0337).rw(m_scsic, FUNC(ncr53c80_device::read), FUNC(ncr53c80_device::write));
@ -269,6 +357,10 @@ void lbpc_state::lbpc(machine_config &config)
m_maincpu->in_ior_cb<2>().set(m_scsic, FUNC(ncr53c80_device::dma_r));
m_maincpu->out_iow_cb<2>().set(m_scsic, FUNC(ncr53c80_device::dma_w));
PC_KBDC(config, m_kbd, pc_xt_keyboards, STR_KBD_IBM_PC_XT_83);
m_kbd->out_clock_cb().set(FUNC(lbpc_state::kbd_clock_w));
m_kbd->out_data_cb().set(FUNC(lbpc_state::kbd_data_w));
SPEAKER(config, "mono").front_center();
SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.5);