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prschess: they are not reed switches (nw)

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This commit is contained in:
hap 2020-03-14 21:26:42 +01:00
parent 5875c3d549
commit ab5640b7f5
1 changed files with 5 additions and 13 deletions
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18
src/mame/drivers/saitek_president.cpp
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@ -7,7 +7,7 @@ SciSys President Chess (model 231)
The ROMs are inside a module, at the top-right. No known upgrades were released.
Apparently the chessboard was not that reliable. The manual even says to flip the
computer and shake it when one of the reed sensors is malfunctioning.
computer and shake it when one of the sensors is malfunctioning.
Hardware notes:
- 6502A @ 2MHz
@ -67,8 +67,7 @@ private:
// I/O handlers
void update_display();
DECLARE_WRITE8_MEMBER(leds0_w);
DECLARE_WRITE8_MEMBER(leds1_w);
DECLARE_WRITE8_MEMBER(leds_w);
DECLARE_WRITE8_MEMBER(control_w);
DECLARE_READ8_MEMBER(input_r);
@ -95,15 +94,9 @@ void president_state::update_display()
m_display->matrix(1 << m_inp_mux, led_data);
}
WRITE8_MEMBER(president_state::leds0_w)
WRITE8_MEMBER(president_state::leds_w)
{
m_led_data[0] = ~data;
update_display();
}
WRITE8_MEMBER(president_state::leds1_w)
{
m_led_data[1] = ~data;
m_led_data[offset >> 8] = ~data;
update_display();
}
@ -143,8 +136,7 @@ READ8_MEMBER(president_state::input_r)
void president_state::main_map(address_map &map)
{
map(0x0000, 0x07ff).ram();
map(0x4000, 0x4000).w(FUNC(president_state::leds0_w));
map(0x4100, 0x4100).w(FUNC(president_state::leds1_w));
map(0x4000, 0x4000).select(0x0100).w(FUNC(president_state::leds_w));
map(0x4200, 0x4200).w(FUNC(president_state::control_w));
map(0x4300, 0x4300).r(FUNC(president_state::input_r));
map(0xc000, 0xffff).rom();