Search found 166 matches

by NekoNoNiaow
Tue Feb 19, 2019 2:19 am
Forum: Cross development tools
Topic: Better code generation (for CC65)
Replies: 2
Views: 94

Better code generation (for CC65)

Hello kitties, I am creating this topic to document my research regarding better code generation for CC65 as mentioned in other recently active threads on the topic. As a first and simple approach I am focusing on fixing/enhancing opt65, which is a simple 6502 peephole optimizer which is apparently ...
by NekoNoNiaow
Tue Feb 19, 2019 1:06 am
Forum: Demos
Topic: OricExos - making the impossible
Replies: 112
Views: 9141

Re: OricExos - making the impossible

Ahahah, this is fantastic work @ISS!
Keep up the effort, I cannot wait to see what can be produced with such a monster setup. ;)
by NekoNoNiaow
Tue Feb 19, 2019 1:03 am
Forum: C programming
Topic: A new well-known compiler
Replies: 32
Views: 18225

Re: A new well-known compiler

I will not answer to all the comments, but I want to start by two things: - I don't think Opt65 has anything to do with CC65, it's something written by a C64 guy many years ago, that's why it's old style C. And yes, if we could get that thing to work (and play nice with auto-modified code, etc...) ...
by NekoNoNiaow
Tue Feb 19, 2019 12:49 am
Forum: C programming
Topic: A new well-known compiler
Replies: 32
Views: 18225

Re: A new well-known compiler

Yeah, I know. But nasty things start happening with automatic int promotions, such as: unsigned char a=200, b=200,c; c=(a+b)/2; You are absolutely right and I just got bitten by that issue: while debugging opt65, I noticed that some additions of 8 bit values were actually compiled into 16 bit value...
by NekoNoNiaow
Tue Feb 12, 2019 1:24 am
Forum: Cross development tools
Topic: OSDK bugs
Replies: 10
Views: 14308

Re: OSDK bugs

Example: If you go on http://www.osdk.org/index.php?page=issues and click on the "Ym2MYM" component name at the end of the page, it links to http://www.osdk.org/index.php?page=documentation&subpage=ym2mym and at the end of the page you have the list of all opened and closed issues, including which ...
by NekoNoNiaow
Tue Feb 12, 2019 1:13 am
Forum: Tape and floppy disk converters
Topic: Novalight - very fast tape loading
Replies: 36
Views: 818

Re: Novalight - very fast tape loading

How long is the loader (in bytes)?
Could you store it in a darkened part of graphic memory and then wipe it entirely once the loading is done?
by NekoNoNiaow
Tue Feb 12, 2019 1:09 am
Forum: C programming
Topic: A new well-known compiler
Replies: 32
Views: 18225

Re: A new well-known compiler

@NekoNoNiaow : Well, we talking about two different Makefiles. 1. Makefiles to compile the OSDK sources from DF SVN repository to native executable for Linux. I'm using the Jylam's Makefiles found in OSDK sub-directories (they are good), but I've created my version of the 'rules.mak' to suit some m...
by NekoNoNiaow
Tue Feb 12, 2019 12:17 am
Forum: Tape and floppy disk converters
Topic: Novalight - very fast tape loading
Replies: 36
Views: 818

Re: Novalight - very fast tape loading

Good job! I am eager to have a look at the sources to see what magic you had to resort to. ;)
by NekoNoNiaow
Tue Feb 05, 2019 1:20 am
Forum: Cross development tools
Topic: Questions to CC65 users
Replies: 7
Views: 480

Re: Questions to CC65 users

polluks wrote:
Mon Jan 21, 2019 12:11 am
cc65 uses

Code: Select all

#pragma zpsym (<name>)
Thanks!
by NekoNoNiaow
Tue Feb 05, 2019 1:19 am
Forum: C programming
Topic: A new well-known compiler
Replies: 32
Views: 18225

Re: A new well-known compiler

What I did is: I've created Makefiles with the same build rules for CC65 and for OSDK's compiler, so I can easy include them in a local Makefile (call it 'Project makefile', which contains the names of source files and some per project parameters) and compile with both compilers. I made this mainly...
by NekoNoNiaow
Tue Feb 05, 2019 12:09 am
Forum: Cross development tools
Topic: OSDK bugs
Replies: 10
Views: 14308

Re: OSDK bugs

By the way, are there now light weight bug/issue tracking systems which could be used for the OSDK? I agree that a full fledged system would be overkill but on the other hand, having to send emails instead of going to a well know web page with proper editing/linking/referencing tools also reduces mo...
by NekoNoNiaow
Mon Feb 04, 2019 11:57 pm
Forum: General Discussion
Topic: Announcing 8bit-Unity: Cross-platform SDK for 8bit games
Replies: 3
Views: 232

Re: Announcing 8bit-Unity: Cross-platform SDK for 8bit games

Great initiative. This looks like an effort intensive project indeed given how varied the 8 bit ecosystem was/is. Have you had a look at the existing similar setups (the OSDK obviously comes to mind) so as to evaluate what kind of features you would have to add in order to keep users happy? I know t...
by NekoNoNiaow
Fri Feb 01, 2019 5:53 am
Forum: 6502 assembly coding
Topic: How to create random number with machine code?
Replies: 8
Views: 469

Re: How to create random number with machine code?

How are you using the generated random numbers? I ask because if you are generating them inside a loop there is a high chance that they will repeat if the timing of the loop is more or less constant. What I would recommend actually is to use a simple modulo based random generator (*) and initialize ...
by NekoNoNiaow
Fri Feb 01, 2019 5:31 am
Forum: Tape and floppy disk converters
Topic: Experimental very fast tape loading
Replies: 138
Views: 29423

Re: Experimental very fast tape loading

Ok, back to it. Currently working at a version that saves 4 bytes in the stack (it's the 10th release candidate...). The optimization quest is a never ending one. :D After this, unless another new idea springs to mind, I'll release it and leave it to others to find if anything can be optimized ;) I...
by NekoNoNiaow
Fri Feb 01, 2019 5:12 am
Forum: C programming
Topic: A new well-known compiler
Replies: 32
Views: 18225

Re: A new well-known compiler

What I did is: I've created Makefiles with the same build rules for CC65 and for OSDK's compiler, so I can easy include them in a local Makefile (call it 'Project makefile', which contains the names of source files and some per project parameters) and compile with both compilers. I made this mainly...