From: Tom Rauchenwald <its.sec@...>
Date: 2006-08-01T05:01:47+09:00
Subject: Re: [QUIZ SOLUTION] #88 Chip-8

James Edward Gray II <james@grayproductions.net> writes:

> On Jul 30, 2006, at 12:17 PM, Tom Rauchenwald wrote:
>
>> Hi,
>>
>> Here is my solution to the current quiz. It has a few flaws, and it
>> uses a method call for each statement (which is probably quite slow).
>> The nice thing is that you can dump a program and view it in an
>> assembler-like way.
>> The implementation is quite simple, I don't think i need to explain it
>> in detail. I hope i haven't screwed up somewhere :)
>
> Sure looks good to me.  Here's one trivial suggestion though:

What bugs me a little bit is that the jmp-code isn't quite right. If i
read the spec right, it would be possible to jump to any byte in the
source-file, even if it's in the middle of an opcode. With my solution
this is not possible. But I realized that after I finished it, and I
didn't want to rewrite it.

>> if ARGV[0]==nil
>>   STDERR.puts "Usage: #{$0} <program file>\n"
>>   exit 1
>> end
>> if !File.exist? ARGV[0]
>>   STDERR.puts "Error: File not found.\n"
>>   exit 1
>> end
>> emu = Emulator.new
>> emu.scan(ARGV[0])
>> print "Program read: \n"
>> print "============= \n"
>> emu.dump_prog
>> print "\nRunning... \n\n"
>> emu.run
>> print "Done! Registers: \n"
>> print "================ \n"
>> emu.dump
>
> puts() will add a newline character, if it's not already at the end of
> the String you pass to it, so you could lose a lot of \n's above  if
> you like.

Thanks, and thanks that you manage this whole quiz-thing and do the
summaries and everything.

> James Edward Gray II

Tom