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Search: Posts Made By: zero
Forum: support.Hardware 23 August 2021, 10:15
Replies: 4
Views: 428
Posted By zero
Thanks, I was afraid you might say that. Couldn't...

Thanks, I was afraid you might say that. Couldn't find much documentation for this monitor so I'll have to just figure it out when I have time.
Forum: support.Hardware 22 August 2021, 23:18
Replies: 4
Views: 428
Posted By zero
Philips CM-8833-II monitor capacitors

I have an almost be CM-8833 mk II monitor. Guy bought it for a project that never happened so it's got about 1 hour of use on it, mostly me testing it out.

Everything looks perfect but I have not...
Forum: support.Hardware 10 June 2021, 12:41
Replies: 20
Views: 1,771
Posted By zero
Yes, the problem is that not all DMA is equal....

Yes, the problem is that not all DMA is equal. Most of the time it's "best effort", so if something else is competing for bandwidth it can get delayed by a cycle or two.

To an extent some delay...
Forum: support.Hardware 08 June 2021, 16:02
Replies: 20
Views: 1,771
Posted By zero
I mean you need to be able to have a timer...

I mean you need to be able to have a timer running in the MCU that samples a port periodically and saves the data into a buffer, which is then send over USB.

On an XMEGA it's really easy, you just...
Forum: support.Hardware 03 June 2021, 14:01
Replies: 20
Views: 1,771
Posted By zero
I looked at it but there was an issue... Maybe...

I looked at it but there was an issue... Maybe something to do with being able to synchronously sample a port?

At the moment I think the best option would be a SAM3 micro, which should be able to...
Forum: support.Hardware 21 May 2021, 11:47
Replies: 20
Views: 1,771
Posted By zero
I've been thinking about this a bit more. There...

I've been thinking about this a bit more. There is a SAM3 ARM MCU that has USB 2.0 and an external RAM interface which could do this using an external high speed ADC.

It's still a bit bandwidth...
Forum: support.Hardware 10 May 2021, 16:28
Replies: 20
Views: 1,771
Posted By zero
That ST part is a beast. Would make sense to use...

That ST part is a beast. Would make sense to use something like that, but as a hobby thing I just don't have to time to work with it I think. Well, maybe I should look, perhaps I could just rip-off...
Forum: support.Hardware 10 May 2021, 10:56
Replies: 20
Views: 1,771
Posted By zero
Well I was planning to just use USB to interface...

Well I was planning to just use USB to interface to the computer. You could just use SPI or something though, as long as it is reasonably fast. For this kind of data recovery application you need to...
Forum: support.Hardware 10 May 2021, 09:28
Replies: 20
Views: 1,771
Posted By zero
I thought about using a USB scope like the Hantek...

I thought about using a USB scope like the Hantek or Picoscope. The goal was to produce something low cost that can be set up and used to churn out disk images.

I see Hantek offer an SDK. I have...
Forum: support.Hardware 09 May 2021, 21:46
Replies: 20
Views: 1,771
Posted By zero
Thanks Jeff, that's really helpful and...

Thanks Jeff, that's really helpful and interesting. So it looks like having an analogue capture would be of some use.

Question is if this idea will be adequate. pandy71, the part I am looking at...
Forum: support.Hardware 09 May 2021, 12:47
Replies: 20
Views: 1,771
Posted By zero
Hmm, so it seems that KF works because the "weak"...

Hmm, so it seems that KF works because the "weak" bit are actually just very short bits. Same signal level, just a signal that is right on the limit of what the Amiga FDC can read and combined with...
Forum: support.Hardware 09 May 2021, 11:51
Replies: 20
Views: 1,771
Posted By zero
Analogue floppy disk reader project

I've started work on a project to read floppy disks at the analogue level.

Stuff like Kryoflux uses the digital output of the drive only. I want to capture the analogue waveform, as you would see...
Forum: Coders. Asm / Hardware 04 April 2021, 12:40
Replies: 84
Views: 11,503
Posted By zero
Great, efficient use of the blitter by pink. ...

Great, efficient use of the blitter by pink.

I wonder how many games from the 80s and 90s came anywhere close to being this efficient. On the one hand the tools we have now to check things like...
Forum: Coders. C/C++ 29 March 2021, 17:37
Replies: 20
Views: 3,059
Posted By zero
I didn't have much time to work on this lately...

I didn't have much time to work on this lately but I have build the "speedcode":

bset d0,3920(a0)
bset d0,6970(a0)
rts

I build the code on the Amiga, not pre-calc, so I can later add some...
Forum: Coders. C/C++ 12 March 2021, 16:17
Replies: 11
Views: 1,636
Posted By zero
It just makes it run the C preprocessor over the...

It just makes it run the C preprocessor over the .s file before compiling it, so you can use C preprocessor directives like #define and #if.

I am only just getting back into 68k assembler and...
Forum: Coders. C/C++ 12 March 2021, 14:52
Replies: 11
Views: 1,636
Posted By zero
I haven't used vasm, and only done a tiny bit of...

I haven't used vasm, and only done a tiny bit of 68k in the GNU assembler. I've done a lot of AVR asm in the GNU assembler though and it's been fine... What is the advantage of vasm?
Forum: Coders. C/C++ 11 March 2021, 18:38
Replies: 20
Views: 3,059
Posted By zero
That's what I did initially, but then I realized...

That's what I did initially, but then I realized that I need to scale the logo on the X axis as well. So sometimes I want to repeat columns, sometimes I want to skip them.

I will work on this a...
Forum: Coders. C/C++ 09 March 2021, 21:54
Replies: 20
Views: 3,059
Posted By zero
Is it any faster though? Usually by the time you...

Is it any faster though? Usually by the time you did a table lookup you might as well just have used MULS.
Forum: Coders. C/C++ 09 March 2021, 17:36
Replies: 20
Views: 3,059
Posted By zero
I meant if it was 32 words wide, with the modulo...

I meant if it was 32 words wide, with the modulo for 20 word wide display... So yes :-)
Forum: Coders. C/C++ 09 March 2021, 17:34
Replies: 20
Views: 3,059
Posted By zero
Yeah, you are right. I don't know why I did that...

Yeah, you are right. I don't know why I did that in my original 90s code, maybe it was an enhancement for A1200...

In which case Jobbo's method should work fine.
Forum: Coders. C/C++ 09 March 2021, 17:31
Replies: 20
Views: 3,059
Posted By zero
Ah, I see... The problem is that it doesn't...

Ah, I see... The problem is that it doesn't account for scaling. The y coordinates will change every frame.

For the same reason I can't just multiple lut_voffset[] by 20 either, it gets messed up...
Forum: Coders. C/C++ 09 March 2021, 16:48
Replies: 20
Views: 3,059
Posted By zero
Thanks, that was a slight improvement, nearly...

Thanks, that was a slight improvement, nearly down to 1 frame now.
Forum: Coders. C/C++ 09 March 2021, 16:44
Replies: 20
Views: 3,059
Posted By zero
I'm not sure what you are getting at here. What...

I'm not sure what you are getting at here. What is the pre-compiled offset?
Forum: Coders. C/C++ 09 March 2021, 16:19
Replies: 20
Views: 3,059
Posted By zero
Lightbulb Optimizing a plot routine

I'm trying to recreate the classic Crystal Crack intro:

https://youtu.be/EctVBg4Ndks

I had this working back in the 90s in assembler, but only on an A1200. My current code isn't fast enough for...
Forum: News 09 March 2021, 12:29
Replies: 172
Views: 30,242
Posted By zero
I'm with mrupp actually, I used to play some...

I'm with mrupp actually, I used to play some games with trainers because I just wanted to have some fun and the huge setbacks made me want to give up.

Most Japanese games are about memorizing the...
Forum: Coders. C/C++ 07 March 2021, 20:45
Replies: 1,313
Views: 216,381
Posted By zero
Thanks, that works.

Thanks, that works.
Forum: Coders. C/C++ 07 March 2021, 18:03
Replies: 1,313
Views: 216,381
Posted By zero
Is it me or does KPrintF formatting not work? I...

Is it me or does KPrintF formatting not work? I tried this:

KPrintF("Right: %d\n", 112);

And the output is

"Right: 0"
Forum: Coders. C/C++ 03 March 2021, 20:37
Replies: 11
Views: 1,636
Posted By zero
Thanks Ernst, that fixed it! I hate...

Thanks Ernst, that fixed it!

I hate makefiles, not because they are terrible but because I only do them occasionally and always forget how to debug them in-between.
Forum: Coders. C/C++ 02 March 2021, 21:32
Replies: 11
Views: 1,636
Posted By zero
Assembler files and C in GCC / bartman's amiga-debug

I'm using bartman's amiga-debug VScode extension and I want to include some assembler files in my project.

I tried to modify the makefile like this:

s_sources := $(wildcard *.s) $(wildcard...
Forum: support.Apps 02 March 2021, 11:47
Replies: 6
Views: 657
Posted By zero
I just made a change to print "??XXXX??" for...

I just made a change to print "??XXXX??" for unknown tokens, where XXXX is the hexadecimal code.
Forum: support.Apps 01 March 2021, 23:57
Replies: 6
Views: 657
Posted By zero
I don't know, it's years since I've done any...

I don't know, it's years since I've done any Blitz code... Apparently there is a tool called "stripper" that can do it, available from http://www.blitz-2000.co.uk/

If you can send over the .bb and...
Forum: support.Apps 01 March 2021, 22:49
Replies: 6
Views: 657
Posted By zero
I used Richard's token list, if you can suggest...

I used Richard's token list, if you can suggest what any of the others are and add them, or just make a list and I'll do it.

It's enough to get my sources readable anyway :-)
Forum: support.Apps 01 March 2021, 11:29
Replies: 6
Views: 657
Posted By zero
Blitz Basic to ASCII converter

Sorry if this is the wrong place to post this...

I made a Blitz Basic to ASCII converter in C. I know there are some already but none seemed to meet my requirements of being simple and portable....
Forum: Coders. Asm / Hardware 19 February 2021, 10:28
Replies: 84
Views: 11,503
Posted By zero
Type punning is the most common one for me I...

Type punning is the most common one for me I think. Yeah you can do it in C++ but it just ends up polluting the code to do what is easy in C.
Forum: Coders. Asm / Hardware 18 February 2021, 11:44
Replies: 84
Views: 11,503
Posted By zero
This hurts my brain :-) Please everyone use...

This hurts my brain :-)

Please everyone use uint8_t, it's so much more precise and descriptive!

Then again I can't really get on board with C++ for this kind of work. I suppose it makes...
Forum: Coders. Asm / Hardware 16 February 2021, 17:10
Replies: 84
Views: 11,503
Posted By zero
Surprising how good GCC is for 68k. I didn't...

Surprising how good GCC is for 68k. I didn't think 68k got much love which usually means poor optimization.
Forum: Coders. Asm / Hardware 15 February 2021, 12:27
Replies: 84
Views: 11,503
Posted By zero
That's how I do it too, although not in games, on...

That's how I do it too, although not in games, on embedded systems.

Usually trade memory for performance, 16 bit alignment etc... But I wonder how that works out on the Amiga? Maybe two memory...
Forum: Coders. Asm / Hardware 14 February 2021, 20:22
Replies: 84
Views: 11,503
Posted By zero
It feels like this is one of the most important...

It feels like this is one of the most important parts of the code, the reason why you are able to get so much on screen. The blitter can do so much if handled right, but I don't think many games came...
Forum: News 11 February 2021, 00:13
Replies: 172
Views: 30,242
Posted By zero
I often wonder how things would have been...

I often wonder how things would have been different if instead of doing 1 meg chip in the A500+ they had gone with 512k chip and 512k fast. It really unlocks a lot of performance.
Forum: Coders. Asm / Hardware 10 February 2021, 20:29
Replies: 84
Views: 11,503
Posted By zero
Interesting, thanks. I guess it will depend on...

Interesting, thanks. I guess it will depend on the game, if there is a decent scripting system for doing enemy attack patterns then you might as well use that data.

In other games I've seen code...
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