diff options
Diffstat (limited to 'src/mame/drivers/aim65.cpp')
-rw-r--r-- | src/mame/drivers/aim65.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/mame/drivers/aim65.cpp b/src/mame/drivers/aim65.cpp index d9c34e4688b..5a37b2f1758 100644 --- a/src/mame/drivers/aim65.cpp +++ b/src/mame/drivers/aim65.cpp @@ -33,6 +33,15 @@ Bugs #include "aim65.lh" +/** R6502 Clock. + * + * The R6502 on AIM65 operates at 1 MHz. The frequency reference is a 4 MHz + * crystal controlled oscillator. Dual D-type flip-flop Z10 divides the 4 MHz + * signal by four to drive the R6502 phase 0 (O0) input with a 1 MHz clock. + */ +static constexpr XTAL AIM65_CLOCK(4_MHz_XTAL / 4); + + /*************************************************************************** ADDRESS MAPS ***************************************************************************/ |