Search found 511 matches

by Jarhmander
Wed Dec 16, 2020 5:57 am
Forum: General Stuff
Topic: What is with indie games and procedural generation?
Replies: 16
Views: 2984

Re: What is with indie games and procedural generation?

Aren't Diablo's levels procedurally generated? They were very well made.
by Jarhmander
Sat Dec 12, 2020 7:35 am
Forum: NESdev
Topic: Vs System Shared Memory
Replies: 48
Views: 6428

Re: Vs System Shared Memory

The self-assignment itself looks incredibly stupid. Never, ever did I have to resort to a workaround that stupid (yes, I *did* have to use stupid workarounds at times, because for example the XC8 compiler did *really* stupid things). Yes, depending on the compiler/platform, I saw the generated code ...
by Jarhmander
Thu Dec 10, 2020 4:40 am
Forum: NESdev
Topic: Vs System Shared Memory
Replies: 48
Views: 6428

Re: Vs System Shared Memory

I developed professionally various embedded systems with different microcontrollers from various vendors (STMicroelectronics, Microchip, NXP, TI, ...), and I can guarantee that for all peripheral register definitions, they all use the volatile keyword for qualifying the storage, either with an exter...
by Jarhmander
Tue Dec 08, 2020 5:42 am
Forum: NESdev
Topic: Vs System Shared Memory
Replies: 48
Views: 6428

Re: Vs System Shared Memory

How is the port pin $4016.2 wired between the CPUs? Is the one from the primary CPU directly wired to the IRQ line of the second CPU, and the $4016.2 port pin of the second CPU somehow connected to the primary CPU's IRQ line?
by Jarhmander
Mon Nov 30, 2020 5:22 am
Forum: Newbie Help Center
Topic: Question about NMI / displaying new background
Replies: 29
Views: 9128

Re: Question about NMI / displaying new background

Can the lack of back up CPU status in the NMI (PHP, PLP) cause errors when using the NMI interrupt along with the code in the CPU loop? I have not used it before and I do not see any mention of it here: https://wiki.nesdev.com/w/index.php/The_frame_and_NMIs NMI: PHP ;add? pha ;protect the registers...
by Jarhmander
Thu Oct 01, 2020 6:32 pm
Forum: NES Hardware and Flash Equipment
Topic: Eccentric pedantic "monochrome" glitch
Replies: 15
Views: 6033

Re: Eccentric pedantic "monochrome" glitch

Huh? How it can be 17/24? I count 6 falling edges when M2 falls. And M2 changes *only* on falling edges of the master clock... For the duty cycle to be 17/24, M2 would have to change state on a raising and falling edges, wouldn't it? And sadly, I can't decipher die photographs (yet?), so I can't see...
by Jarhmander
Thu Oct 01, 2020 4:32 am
Forum: NES Hardware and Flash Equipment
Topic: Eccentric pedantic "monochrome" glitch
Replies: 15
Views: 6033

Re: Eccentric pedantic "monochrome" glitch

lidnariq wrote:
Wed Sep 30, 2020 3:59 pm
(Also: does anyone have a 2A03letterless and can test what the actual duty cycle of M2 is? It's not 3/4.)
Long ago, I took that measure and yes, it's ¾. Not the best measurements in the world, but it can clearly be seen.
by Jarhmander
Sun Sep 06, 2020 6:12 am
Forum: phpBB Issues
Topic: Preview after submitting posts?
Replies: 7
Views: 2274

Re: Preview after submitting posts?

Reproduced the preview thing. I just basically spam-clicked the "Submit" button, and saw my useless post in the preview. That's bad, it looks like the "submit" button just sends the post text and the server software either can't know if it has already processed the post, or just ignore/don't care th...
by Jarhmander
Sun Sep 06, 2020 6:00 am
Forum: phpBB Issues
Topic: Preview after submitting posts?
Replies: 7
Views: 2274

Re: Preview after submitting posts?

(testing double submit, ignore this/these post(s))
by Jarhmander
Fri Aug 21, 2020 6:32 pm
Forum: General Stuff
Topic: Strategies for implementing macro functionality in assemblers
Replies: 18
Views: 9373

Re: Strategies for implementing macro functionality in assemblers

It is "third". A C preprocessor just expands until 1) there's nothing left to expand, or 2) while expanding, it encounters a macro that was already expanded before (in the same expansion context), and let it as it is, to prevent any recursion. That means #define foo bar, baz #define bar foo, bar "fo...
by Jarhmander
Fri Aug 21, 2020 8:30 am
Forum: General Stuff
Topic: Strategies for implementing macro functionality in assemblers
Replies: 18
Views: 9373

Re: Strategies for implementing macro functionality in assemblers

the string substitution, just stack alloc the temp buffer, that should easily handle every thing a sane person would through at a 6502 assembler. So make a large buffer, then start from the back and expand as you need to doing find replaces. Keep the src and convert one into the buffer going forwar...
by Jarhmander
Thu Aug 20, 2020 2:46 pm
Forum: General Stuff
Topic: Strategies for implementing macro functionality in assemblers
Replies: 18
Views: 9373

Re: Strategies for implementing macro functionality in assemblers

You seem to worry too much about optimizations at this time; even worse, you're worrying about how to manage memory down to the macro-handling code. Your time will be much better spent on how to structure things and separate concerns. Strings, for instance, are best managed in objects with a minimal...
by Jarhmander
Wed Aug 19, 2020 4:39 am
Forum: NESdev
Topic: Questions about NES programming and architecture
Replies: 143
Views: 31634

Re: Questions about NES programming and architecture

Controllerhead wrote:
Tue Aug 18, 2020 7:39 pm
Image
Image
by Jarhmander
Sun Aug 02, 2020 6:29 am
Forum: General Stuff
Topic: Making "Good" Assembly Code
Replies: 73
Views: 25835

Re: Making "Good" Assembly Code

Two pages ago, someone asked for a CPU with a math-like syntax (or C-style syntax), instead of a "COBOL" like syntax (oops, mixing things up with the other thread). Here it is, my friends: CSR's Kalimba processor . Just look at the assembly code, it really looks like C at times. Not too surprisingly...