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--- x68000:h.a.r.p_for_mc68000_-_cpu_accelerator_board [2012/01/26 03:11] – eidis
+++ x68000:h.a.r.p_for_mc68000_-_cpu_accelerator_board [2019/08/27 20:45] (current) – external edit 127.0.0.1
@@ Line 9: / Line 9: @@
 {{:x68000:harp_2.jpg|}}
-There is a red dipswitch in the center of the photo labeled SW1 which must be set to 2 (OFF) for normal operation and 1 (ON) when used along with a Jast made memory expansion.
+There is a red dipswitch in the center of the photo labeled SW1. Both switches must be set to OFF for normal operation. Switch 1 must be set to ON when this device is used along with a Jast made memory expansion.
 ☆ ☆ ☆ Oh!X Information ☆ ☆ ☆
-H.A.R.P will accelerate the CPU and double its internal clock speed 2x up to 20MHz. But the built-in factory default will remain at 10MHz because it is needed for arbitration. That is, it is working in full-20MHZ when CPU calculates and !!!!! when accessing the external bus is considerably 落Tosane do not have to 10MHz.
+H.A.R.P will accelerate the CPU and double its internal clock from 10MHz to 20MHz. However the factory default system bus speed will remain at 10MHz because it is needed for arbitration. That is, it will work in 20MHz when CPU calculates and in 10MHz when accessing external bus. Therefore, the actual speed increase is only about 10%.
-Therefore, the actual rate of say what happens, "We have only about 10% faster!" Is that it is not.