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archimedes_keyb.cpp: Improved quadrature mouse accuracy, and added notes on keyboard variants.

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This commit is contained in:
Nigel Barnes 2021-12-21 13:52:24 +00:00
parent d7b79ad22c
commit 9a72f4594d
2 changed files with 103 additions and 57 deletions
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110
src/mame/machine/archimedes_keyb.cpp
View File

@ -2,7 +2,23 @@
// copyright-holders:Angelo Salese, Sandro Ronco
/**********************************************************************
Acorn Archimedes keyboard
Acorn Archimedes keyboard (A5000)
Keyboard variants:
A500 (external) 6500/11 MCU w/ 2732 ROM (dumped), see A500 Hardware Guide.
A3x0 (external) 8031 MCU w/ 2764 ROM (dumped), not documented.
A4x0 (external) 8031 MCU w/ 2764 ROM (dumped), same as A3x0.
A680 (external) unknown.
A3000 (internal) 8051 MCU (part 0280,022) w/ internal ROM (dumped), see A3000TRM.
A540 (external) 8051 MCU (part 0280,022) w/ internal ROM, see A500/R200TRM, same as A3000.
A5000 (external) 8051 MCU (part 0280,022) w/ internal ROM, see A5000TRM, same as A3000.
A4 (internal) 8051 MCU (part 0290,031) w/ internal ROM, see A4TRM. Supports PS/2 keyboard.
A30x0 (internal) 8051 MCU (part 0294,031) w/ internal ROM, see A3010TRM.
A4000 (external) likely same as A30x0, but not confirmed.
TODO:
- convert to slot device and move to bus/archimedes/keyboard.
- add other variants.
*********************************************************************/
@ -188,10 +204,10 @@ static INPUT_PORTS_START( archimedes_keyboard )
PORT_BIT(0xfeff, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("MOUSE.0")
PORT_BIT(0xffff, IP_ACTIVE_HIGH, IPT_MOUSE_X) PORT_SENSITIVITY(50) PORT_KEYDELTA(0) PORT_RESET PORT_CODE(MOUSECODE_X) PORT_CHANGED_MEMBER(DEVICE_SELF, archimedes_keyboard_device, update_mouse_input, 0)
PORT_BIT(0xffff, IP_ACTIVE_HIGH, IPT_MOUSE_X) PORT_SENSITIVITY(100)
PORT_START("MOUSE.1")
PORT_BIT(0xffff, IP_ACTIVE_HIGH, IPT_MOUSE_Y) PORT_SENSITIVITY(50) PORT_KEYDELTA(0) PORT_RESET PORT_CODE(MOUSECODE_Y) PORT_CHANGED_MEMBER(DEVICE_SELF, archimedes_keyboard_device, update_mouse_input, 1) PORT_REVERSE
PORT_BIT(0xffff, IP_ACTIVE_HIGH, IPT_MOUSE_Y) PORT_SENSITIVITY(100)
PORT_START("MOUSE.2")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(MOUSECODE_BUTTON1) PORT_NAME("Mouse Left")
@ -242,7 +258,8 @@ void archimedes_keyboard_device::device_start()
save_item(NAME(m_mouse_x));
save_item(NAME(m_mouse_y));
save_item(NAME(m_mouse_phase));
save_item(NAME(m_mouse_xphase));
save_item(NAME(m_mouse_yphase));
save_item(NAME(m_mouse_xref));
save_item(NAME(m_mouse_xdir));
save_item(NAME(m_mouse_yref));
@ -258,9 +275,10 @@ void archimedes_keyboard_device::device_reset()
{
m_mouse_x = 0;
m_mouse_y = 0;
m_mouse_phase = 1;
m_mouse_xphase = 1;
m_mouse_xref = 1;
m_mouse_xdir = 1;
m_mouse_yphase = 1;
m_mouse_yref = 1;
m_mouse_ydir = 1;
m_mux = 0;
@ -329,35 +347,72 @@ void archimedes_keyboard_device::device_timer(emu_timer &timer, device_timer_id
// 0 0 0 0
// 0 1 1 0
switch (m_mouse_phase)
int16_t x = m_mouse[0]->read();
int16_t y = m_mouse[1]->read();
int16_t dx = x - m_mouse_x;
int16_t dy = y - m_mouse_y;
if (dx)
{
// Set the output pins according to the current phase
switch (m_mouse_xphase)
{
case 0:
m_mouse_xdir = m_mouse_xref = 1;
m_mouse_ydir = m_mouse_yref = 1;
m_mouse_xref = 1;
break;
case 1:
m_mouse_xref = m_mouse_x < 0 ? 0 : 1;
m_mouse_xdir = m_mouse_x > 0 ? 0 : 1;
m_mouse_yref = m_mouse_y < 0 ? 0 : 1;
m_mouse_ydir = m_mouse_y > 0 ? 0 : 1;
m_mouse_xdir = 1;
break;
case 2:
m_mouse_xdir = m_mouse_xref = m_mouse_x != 0 ? 0 : 1;
m_mouse_ydir = m_mouse_yref = m_mouse_y != 0 ? 0 : 1;
m_mouse_xref = 0;
break;
case 3:
m_mouse_xref = m_mouse_x > 0 ? 0 : 1;
m_mouse_xdir = m_mouse_x < 0 ? 0 : 1;
m_mouse_yref = m_mouse_y > 0 ? 0 : 1;
m_mouse_ydir = m_mouse_y < 0 ? 0 : 1;
if (m_mouse_x > 0) m_mouse_x--;
if (m_mouse_x < 0) m_mouse_x++;
if (m_mouse_y > 0) m_mouse_y--;
if (m_mouse_y < 0) m_mouse_y++;
m_mouse_xdir = 0;
break;
}
m_mouse_phase = (m_mouse_phase + 1) & 3;
// Change phase
if (dx > 0)
m_mouse_xphase--;
else
m_mouse_xphase++;
// Range check the phase
m_mouse_xphase &= 3;
}
if (dy)
{
// Set the output pins according to the current phase
switch (m_mouse_yphase)
{
case 3:
m_mouse_yref = 0;
break;
case 2:
m_mouse_ydir = 0;
break;
case 1:
m_mouse_yref = 1;
break;
case 0:
m_mouse_ydir = 1;
break;
}
// Change phase
if (dy > 0)
m_mouse_yphase--;
else
m_mouse_yphase++;
// Range check the phase
m_mouse_yphase &= 3;
}
m_mouse_x = x;
m_mouse_y = y;
}
void archimedes_keyboard_device::leds_w(uint8_t data)
@ -381,12 +436,3 @@ void archimedes_keyboard_device::tx_w(uint8_t data)
if (is_transmit_register_empty())
transmit_register_setup(data);
}
INPUT_CHANGED_MEMBER(archimedes_keyboard_device::update_mouse_input)
{
if (param == 0)
m_mouse_x = (int16_t)m_mouse[0]->read();
if (param == 1)
m_mouse_y = (int16_t)m_mouse[1]->read();
}

6
src/mame/machine/archimedes_keyb.h
View File

@ -30,7 +30,6 @@ public:
auto kout() { return m_kout.bind(); }
DECLARE_WRITE_LINE_MEMBER(kin_w) { rx_w(state); }
DECLARE_INPUT_CHANGED_MEMBER(update_mouse_input);
protected:
// device-level overrides
@ -60,10 +59,11 @@ private:
required_ioport_array<3> m_mouse;
output_finder<3> m_leds;
emu_timer * m_mouse_timer;
uint8_t m_mouse_phase;
emu_timer *m_mouse_timer;
uint8_t m_mouse_xphase;
uint8_t m_mouse_xdir;
uint8_t m_mouse_xref;
uint8_t m_mouse_yphase;
uint8_t m_mouse_ydir;
uint8_t m_mouse_yref;
int16_t m_mouse_x;