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Search found 9 matches

by javacardx
Wed Apr 18, 2018 11:58 pm
Forum: Other Tools
Topic: I want a tool to get bytecode speed time
Replies: 4
Views: 1752

Re: I want a tool to get bytecode speed time

Sorry,the PDF file was blocked. If you need it, you can send me a private message.
by javacardx
Wed Apr 18, 2018 11:57 pm
Forum: Other Tools
Topic: I want a tool to get bytecode speed time
Replies: 4
Views: 1752

Re: I want a tool to get bytecode speed time

In the early years of my research on java card,I have used a java card performance software named Mesure(yes,it's not "measure").But I have no bin release files or source code now. I remember this software tool have some function about byte code speed of java card. There are two pictures a...
by javacardx
Tue Mar 20, 2018 5:54 am
Forum: Algorithm School
Topic: How to generate random data?
Replies: 2
Views: 493

Re: How to generate random data?

You can reference this first,maybe it is useful.
viewtopic.php?f=31&t=1265&p=4068&hilit=random#p4068
by javacardx
Tue Feb 27, 2018 11:35 pm
Forum: Questions & Answers
Topic: About Get Data Command
Replies: 3
Views: 474

Re: About Get Data Command

I copied some paragraph from GP211 and emphasized some words. I think that maybe you are right.But I am still puzzled about "It does not mandate".Is there anybody to explain it? The following meanings apply to SHALL , SHOULD , and MAY in this document: • SHALL indicates that the statement ...
by javacardx
Mon Feb 26, 2018 2:18 am
Forum: Questions & Answers
Topic: Is there any way to find out how much memory size has my applet taken up?
Replies: 6
Views: 584

Re: Is there any way to find out how much memory size has my applet taken up?

There are two API functions relating with MEMORY SIZE in following (which is v1 and v2 that copy from package javacard.framework.JCSystem ). v1:public static short getAvailableMemory(byte memoryType) throws SystemException //javacard 2.2.2 v2:public static void getAvailableMemory(short[] buffer, sho...
by javacardx
Wed Nov 22, 2017 11:29 pm
Forum: Reader
Topic: The Square card reader
Replies: 2
Views: 618

Re: The Square card reader

Maybe the new version firmware program of the reader has some bugs when it has been releaseed.
by javacardx
Thu Oct 19, 2017 5:50 am
Forum: Communication
Topic: How to get source code from the cap file
Replies: 4
Views: 1941

Re: How to get source code from the cap file

It's possible in theory.
If the cap file without the DEBUG component,the decompiling source(.java) files will lost many informations.
It will be difficult to read or understand.
by javacardx
Thu Oct 19, 2017 5:37 am
Forum: Questions & Answers
Topic: Change ATR value
Replies: 4
Views: 651

Re: Change ATR value

There is a simple way without reading any SPEC :mrgreen:
https://www.javacardos.com/tools/atr.html
by javacardx
Thu Sep 28, 2017 12:01 am
Forum: Questions & Answers
Topic: APDU generation
Replies: 3
Views: 467

Re: APDU generation

Maybe you should notice the setting about the baud rate of serial communication. If you give more detail about your current test environment, it will more easily for others to help you.
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