x68000:h.a.r.p_for_mc68000_-_cpu_accelerator_board
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x68000:h.a.r.p_for_mc68000_-_cpu_accelerator_board [2012/01/26 02:27] – eidis | x68000:h.a.r.p_for_mc68000_-_cpu_accelerator_board [2012/02/05 05:08] – eidis | ||
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- | H.A.R.P for mc68000 was manufactured and sold by Jast Inc from 1994 and is accelerator | + | H.A.R.P for mc68000 was manufactured and sold by Jast Inc from 1994 and is accelerator |
- | This is a replacement board from the body of X68000 in the CPU, the CPU socket | + | |
- | The adaptive model, the first (except those that are soldered | + | |
{{: | {{: | ||
- | There are red in the center | + | There is a red dipswitch |
- | SW1 when used with Memory Co., Ltd. - It is said that just made to ON 1. | + | |
- | ☆ ☆ ☆ Oh! ☆ ☆ ☆ X Information | + | ☆ ☆ ☆ Oh!X Information |
- | H.A.R.P will be doubled to 20MHz internal clock of the CPU, 2x accelerator. But the body remains at 10MHz from the street now, I needed it to arbitration. | + | |
- | That is, when calculated in the CPU is even moving into full-20MHZ, when accessing the external bus is considerably 落Tosane do not have to 10MHz. | + | |
- | Therefore, the actual rate of say what happens, "We have only about 10% faster!" | + | |
+ | 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%. |
x68000/h.a.r.p_for_mc68000_-_cpu_accelerator_board.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1