Author Topic: js - Relative Jump Calculator  (Read 5379 times)

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Offline Keoni29

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js - Relative Jump Calculator
« on: July 11, 2014, 05:06:37 am »

It does exactely what you think it'd do. Enter the start and end address and it calculates the offset for you. It takes the 2 byte offset in account required for most branch instructions (eg. z80 or 6502 branch instructions)
http://jsfiddle.net/4h5YD/22/
« Last Edit: August 19, 2014, 06:04:54 am by Keoni29 »
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Offline Streetwalrus

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Re: js - Relative Jump Calculator
« Reply #1 on: July 11, 2014, 05:10:26 am »
Nice app Keoni, as always ! :D

Offline Sorunome

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Re: js - Relative Jump Calculator
« Reply #2 on: July 11, 2014, 09:54:12 am »
Haha, nice one!
Luckily assemblers do this for you, though :P
Still useful if you are xeda program in hex :)

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Offline Xeda112358

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Re: js - Relative Jump Calculator
« Reply #3 on: July 11, 2014, 09:56:49 am »
Pssh, I just either memorize how many bytes there are between jumps or quickly add it up >_>
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EDIT: Oh, this was @Sorunome


@Keoni: Honestly, this can be handy at times.

Offline Keoni29

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Re: js - Relative Jump Calculator
« Reply #4 on: July 11, 2014, 12:44:46 pm »
I wrote this for myself because the assembler on the power cartridge for my commodore64 does not support labels. It's a one-line assembler: assembles a line after you type it and hit return.
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Offline Keoni29

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Re: js - Relative Jump Calculator
« Reply #5 on: July 12, 2014, 10:31:55 am »
Oops there was a typo in that jsfiddle. Updated version: http://jsfiddle.net/4h5YD/20/
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Offline Sorunome

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Re: js - Relative Jump Calculator
« Reply #6 on: July 12, 2014, 11:39:29 am »
Suggestion: allow the $ prefix

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Offline Keoni29

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Re: js - Relative Jump Calculator
« Reply #7 on: July 12, 2014, 12:17:12 pm »
Good idea. I was thinking about that actually. I am going to implement it in the regex which will also get rid of inputs like: Derp and asdf, cause javascript just parses the hexadecimal number until it sees a character that is not valid and spits out the result.
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Offline Keoni29

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Re: js - Relative Jump Calculator
« Reply #8 on: August 18, 2014, 10:13:29 am »
Just fixed a tiny bug. I want to host this on my server if enough people find this useful.
http://jsfiddle.net/4h5YD/22/
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Offline Sorunome

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Re: js - Relative Jump Calculator
« Reply #9 on: August 18, 2014, 07:38:31 pm »
It are just a few KB, so why not host it on your server anyways so that you have all your stuff centralized?

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Offline Keoni29

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Re: js - Relative Jump Calculator
« Reply #10 on: August 19, 2014, 06:16:58 am »
There you go:
http://8times8.eeems.me:81/app/jump/
The /app directory will contain all of my applications soon.
http://8times8.eeems.me:81/app will have a list of links to all applications.
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Offline Sorunome

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Re: js - Relative Jump Calculator
« Reply #11 on: August 19, 2014, 01:17:33 pm »
Also, it's awesome to see how far you got with js in such a short time :)

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Offline Keoni29

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Re: js - Relative Jump Calculator
« Reply #12 on: August 19, 2014, 01:19:16 pm »
Thank you :)
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