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i8279: Remove timing hack; make sure SL3 gets output (Pied Piper needs it)

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This commit is contained in:
AJR 2020-02-20 16:29:33 -05:00
parent 21e19cecd2
commit d143f4f43d
1 changed files with 3 additions and 8 deletions
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11
src/devices/machine/i8279.cpp
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@ -167,15 +167,10 @@ void i8279_device::device_reset()
void i8279_device::timer_adjust()
{
// Real device runs at about 100kHz internally, clock divider is chosen so that
// this is the case. We do not need such speed, 2000Hz is enough.
// If this is too long, the sensor mode doesn't work correctly.
// this is the case. If this is too long, the sensor mode doesn't work correctly.
#if 0
u8 divider = (m_cmd[1]) ? m_cmd[1] : 1;
u32 new_clock = clock() / divider;
#else
u32 new_clock = 2000;
#endif
if (m_scanclock != new_clock)
{
@ -360,7 +355,7 @@ void i8279_device::timer_mainloop()
else
m_scanner++;
m_scanner &= scanner_mask; // 4-bit port
m_scanner &= 15; // 4-bit port
if ( !m_out_sl_cb.isnull() )
m_out_sl_cb((offs_t)0, m_scanner);
@ -368,7 +363,7 @@ void i8279_device::timer_mainloop()
// output a digit
if ( !m_out_disp_cb.isnull() )
m_out_disp_cb((offs_t)0, m_d_ram[m_scanner] );
m_out_disp_cb((offs_t)0, m_d_ram[m_scanner & scanner_mask] );
}