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author AJR <ajrhacker@users.noreply.github.com>2018-12-26 21:43:11 -0500
committer AJR <ajrhacker@users.noreply.github.com>2018-12-26 23:12:52 -0500
commit876302d2cf482a23eccf7545809c059676152a1d (patch)
tree220d914469f7f769ae047060efd7eea09fedf7de
parent9ef591849e1ef6882ea247de900026c2758dd597 (diff)
ddi1: Clock source and explanation (nw)
-rw-r--r--src/devices/bus/cpc/ddi1.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/bus/cpc/ddi1.cpp b/src/devices/bus/cpc/ddi1.cpp
index 788eab1a211..0202f9374ae 100644
--- a/src/devices/bus/cpc/ddi1.cpp
+++ b/src/devices/bus/cpc/ddi1.cpp
@@ -42,7 +42,7 @@ const tiny_rom_entry *cpc_ddi1_device::device_rom_region() const
// device machine config
void cpc_ddi1_device::device_add_mconfig(machine_config &config)
{
- UPD765A(config, m_fdc, 4'000'000, true, true);
+ UPD765A(config, m_fdc, DERIVED_CLOCK(1, 1), true, true); // pin 50 clock multiplied to 8 MHz, then divided back down through SMC FDC9229BT
FLOPPY_CONNECTOR(config, m_connector, ddi1_floppies, "3ssdd", floppy_image_device::default_floppy_formats);
SOFTWARE_LIST(config, "flop_list").set_original("cpc_flop");