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Diffstat (limited to 'src/devices/bus/bbc/fdc/ams.cpp')
-rw-r--r--src/devices/bus/bbc/fdc/ams.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/bus/bbc/fdc/ams.cpp b/src/devices/bus/bbc/fdc/ams.cpp
index ef9cb63a46a..02af01be5c5 100644
--- a/src/devices/bus/bbc/fdc/ams.cpp
+++ b/src/devices/bus/bbc/fdc/ams.cpp
@@ -43,7 +43,7 @@ ROM_END
void bbc_ams3_device::device_add_mconfig(machine_config &config)
{
- I8271(config, m_fdc, 16_MHz_XTAL / 8);
+ I8271(config, m_fdc, DERIVED_CLOCK(1, 4));
m_fdc->intrq_wr_callback().set(DEVICE_SELF_OWNER, FUNC(bbc_fdc_slot_device::intrq_w));
m_fdc->hdl_wr_callback().set(FUNC(bbc_ams3_device::motor_w));
m_fdc->opt_wr_callback().set(FUNC(bbc_ams3_device::side_w));