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-rw-r--r--src/emu/xtal.cpp8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/emu/xtal.cpp b/src/emu/xtal.cpp
index aa58705baf2..2679feaae80 100644
--- a/src/emu/xtal.cpp
+++ b/src/emu/xtal.cpp
@@ -31,9 +31,11 @@
tolerance so be sure to reference existing parts only and not just
accept direct readings as 100% true.
- MAME doesn't yet support fractions in crystal frequencies. For example,
- XTAL(3'579'545) should actually be 3579545.454545...Hz (39375000/11).
- This is no problem though: see above note about tolerance.
+ MAME supports fractions in crystal frequencies, but for historical
+ and readability reasons we tend to write the closest integer
+ value. For example, XTAL(3'579'545) should actually be
+ 3579545.454545...Hz (39375000/11). This is no problem though: see
+ above note about tolerance.
In the "Examples" column, please don't add 1000 examples, this is just
for interest, so two or three examples is enough.