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14MHz Osc Chip Question
All Apple II, II+, //e, and //c use 14MHz osc chip. I understand that
it is only 14MHz that it can divide into 7MHz, 3.5MHz, 2MHz, and 1MHz. 1MHz
can be used for 6502 CPU only.
My question is: If 14MHz osc chip is replaced to 25MHz osc chip, will
14MHz, 7MHz, 3.5MHz AND 2MHz be REMAINED THE SAME for RAM, Video Scanner,
Video Monitor, and ETC, BUT 10MHz will be REPLACED from 1MHz for 6502 CPU to
increase the speed? Correct?
(For 1MHz only) I understand that approx 17000 cycles can be executed
every one second. I suspect that it is approx 10 to 16 opcode instructions
can be executed each one second WHILE approx 16500 cycles are TAKEN for RAM
and Video Generator. I am confused that only million opcode instructions
can be executed each one second that is opposite to 12-16 opcode
instructions. Can you please explain more. If it is the case that 1/65
cycle can be done with opcode instruction each one second while 64/65 cycles
can be done with RAM and Video Generator.
I am happy that I won on eBay to purchase the Understanding the Apple II
manual and Understanding the Apple //e manual. They do provide the
information about timing scheme. I am not sure that I understand what the
manual meant. I hope that David can be able to tell more on the newsgroups.
I am willing to copy from page to page on both manuals and convert them
into electronic text that will be available, but a problem is that Copyright
noted in the first page states: Do not reproduce via electronic text, but
Copyright 1984 has been dropped. It is out of publisher that it is harder
to find. It will never be available to the public that Apple II users and
Emulator users want to view them. Do I have to ask the author/publisher
permission or do I have to do with law enforcement?
Other option is that electronic text will be developed in the software
that will prevent users from copying each words. (Like using ctrl-c and
ctrl-v) All the text in the documents will be encrypted. It may be
possible to be legal.
I will be very pleased that David will be willing to provide the
information about cycles that I want to learn.
--
Yours Truly,
Bryan Parkoff
BParkoff@satx.rr.com