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author AJR <ajrhacker@users.noreply.github.com>2019-06-01 16:59:12 -0400
committer AJR <ajrhacker@users.noreply.github.com>2019-06-01 16:59:12 -0400
commit48a79e58c068c1e262ebd7e99cb0c7453c8225f8 (patch)
tree98b9a50651d6d0737032ce433abcd25ab0ae14dd
parent5b68b8ac057647962b318781d5cf3e0ea5b87e52 (diff)
systel100: Correct clocks (nw)
-rw-r--r--src/mame/drivers/systel1.cpp10
1 files changed, 5 insertions, 5 deletions
diff --git a/src/mame/drivers/systel1.cpp b/src/mame/drivers/systel1.cpp
index c816079c138..39c47ab85f8 100644
--- a/src/mame/drivers/systel1.cpp
+++ b/src/mame/drivers/systel1.cpp
@@ -187,12 +187,12 @@ static void systel1_floppies(device_slot_interface &device)
}
static DEVICE_INPUT_DEFAULTS_START(keyboard)
- DEVICE_INPUT_DEFAULTS("RS232_TXBAUD", 0xff, RS232_BAUD_9600)
+ DEVICE_INPUT_DEFAULTS("RS232_TXBAUD", 0xff, RS232_BAUD_1200)
DEVICE_INPUT_DEFAULTS_END
void systel1_state::systel1(machine_config &config)
{
- Z80(config, m_maincpu, 2_MHz_XTAL); // Z8400A; clock not verified
+ Z80(config, m_maincpu, 10.8864_MHz_XTAL / 4); // Z8400A; clock verified
m_maincpu->set_addrmap(AS_PROGRAM, &systel1_state::mem_map);
m_maincpu->set_addrmap(AS_OPCODES, &systel1_state::m1_map);
m_maincpu->set_addrmap(AS_IO, &systel1_state::io_map);
@@ -200,7 +200,7 @@ void systel1_state::systel1(machine_config &config)
input_merger_device &mainint(INPUT_MERGER_ANY_HIGH(config, "mainint"));
mainint.output_handler().set_inputline(m_maincpu, INPUT_LINE_IRQ0);
- I8257(config, m_dmac, 2_MHz_XTAL); // P8257-5
+ I8257(config, m_dmac, 10.8864_MHz_XTAL / 4); // P8257-5
m_dmac->out_hrq_cb().set(FUNC(systel1_state::hrq_w));
m_dmac->in_memr_cb().set(FUNC(systel1_state::memory_r));
m_dmac->out_memw_cb().set(FUNC(systel1_state::memory_w));
@@ -208,12 +208,12 @@ void systel1_state::systel1(machine_config &config)
m_dmac->out_iow_cb<1>().set(m_fdc, FUNC(fd1797_device::data_w));
m_dmac->out_iow_cb<2>().set("crtc", FUNC(i8276_device::dack_w));
- i8251_device &usart(I8251(config, "usart", 2_MHz_XTAL)); // AMD P8251A
+ i8251_device &usart(I8251(config, "usart", 10.8864_MHz_XTAL / 4)); // AMD P8251A
usart.rxrdy_handler().set("mainint", FUNC(input_merger_device::in_w<0>));
usart.rts_handler().set(FUNC(systel1_state::rts_w));
usart.dtr_handler().set(FUNC(systel1_state::dtr_w));
- clock_device &baudclock(CLOCK(config, "baudclock", 2_MHz_XTAL / 13)); // rate not verified, but also probably fixed
+ clock_device &baudclock(CLOCK(config, "baudclock", 2_MHz_XTAL / 104)); // 19.23 kHz verified; rate probably fixed
baudclock.signal_handler().set("usart", FUNC(i8251_device::write_rxc));
baudclock.signal_handler().append("usart", FUNC(i8251_device::write_txc));