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Forum: Coders. System 26 June 2022, 20:58
Replies: 11
Views: 939
Posted By Mathesar
Thanks all for the helpful comments so far. A...

Thanks all for the helpful comments so far. A small update:
I have managed to install vbcc on my A3000. It compiles Niklas's version of the driver just fine after adding a missing header define. I...
Forum: Coders. System 12 June 2022, 20:49
Replies: 11
Views: 939
Posted By Mathesar
I am pretty sure that Mike's driver and all it's...

I am pretty sure that Mike's driver and all it's derivatives like the SDbox driver do not use any semaphores (or any other mechanism) to prevent multiple IO requests from corrupting the data...
Forum: Coders. System 12 June 2022, 20:17
Replies: 11
Views: 939
Posted By Mathesar
The line is here: ...

The line is here:
https://github.com/mikestir/k1208-drivers/blob/master/sd/device.c#L205
To me it suggest this Macro is used to generate the romtag table, but I can't find where the macro comes...
Forum: Coders. System 12 June 2022, 11:03
Replies: 11
Views: 939
Posted By Mathesar
Now that I think of it, the SD card driver would...

Now that I think of it, the SD card driver would be called by DOS right? Maybe that is the reason it works as maybe DOS will make sure BeginIO is not called from multiple processes?
Forum: Coders. System 12 June 2022, 10:58
Replies: 11
Views: 939
Posted By Mathesar
Thanks for your reply. I think this is exactly...

Thanks for your reply.
I think this is exactly what the Mike's driver does. As does the A500IDE driver from Mika. But then there should be some mechanism in the driver to prevent recurring calls...
Forum: Coders. System 12 June 2022, 08:44
Replies: 11
Views: 939
Posted By Mathesar
Some questions about devices and compilers

I have finally started work in this idea I had for a super simple Amiga 500 SPI controller. The hardware for this is now done so I am turning my attention to the software. The SPI controller has two...
Forum: Hardware mods 28 May 2022, 18:13
Replies: 44
Views: 4,227
Posted By Mathesar
;) Exciting! But we can speculate right? It must...

;) Exciting! But we can speculate right? It must be a microcontroller then. But it uses an external crystal oscillator which is unusual (in my book) as most chips have an accurate enough rc...
Forum: Hardware mods 28 May 2022, 15:52
Replies: 44
Views: 4,227
Posted By Mathesar
@kipper2k What chip is on the CIA...

@kipper2k

What chip is on the CIA replacement? Given there is a crystal oscillator on there I would guess it is a microcontroller. Would make sense, the E clock is so slow that almost anything can...
Forum: Hardware mods 26 May 2022, 10:00
Replies: 184
Views: 40,429
Posted By Mathesar
The SE edition

I have designed a new version of the 14MHz accelerator, the "SE" edition.
SE stands for "sidecar edition", "special edition", "snail edition" or whatever you like to call it. ;)

The big new...
Forum: News 22 May 2022, 17:51
Replies: 86
Views: 5,700
Posted By Mathesar
Cool! Will try it out asap.

Cool! Will try it out asap.
Forum: Amiga scene 15 May 2022, 18:03
Replies: 1,345
Views: 290,752
Posted By Mathesar
My first reaction was "Eye monsters??? Reminds me...

My first reaction was "Eye monsters??? Reminds me of some of the lesser doom clones imho."
Then I saw them moving! Wow :great
Great level! And all the new effects are nice as well. This game looks...
Forum: Hardware mods 09 May 2022, 08:44
Replies: 44
Views: 4,227
Posted By Mathesar
Impressive stuff!!!!! :great

Impressive stuff!!!!!
:great
Forum: Hardware mods 05 May 2022, 07:14
Replies: 184
Views: 40,429
Posted By Mathesar
There is this one: http://irixlabs.com/hc508 ...

There is this one: http://irixlabs.com/hc508
and this one: https://amigastore.eu/597-wicher-508i-accelerator.html
and this one for A500 available as open source...
Forum: Amiga scene 24 April 2022, 08:00
Replies: 1,345
Views: 290,752
Posted By Mathesar
A sunday morning surprise. Gonna watch...

A sunday morning surprise. Gonna watch immediately !
Forum: Hardware mods 15 April 2022, 20:38
Replies: 184
Views: 40,429
Posted By Mathesar
:great You fixed it! Yeah, 220pf is definitely...

:great You fixed it! Yeah, 220pf is definitely too much and will make the PLL loop unstable. I am very happy to hear that your card now works as it should.

Also, you're right, C15 must be 100pf....
Forum: Hardware mods 15 April 2022, 14:38
Replies: 184
Views: 40,429
Posted By Mathesar
I still suspect some other component having the...

I still suspect some other component having the wrong value. C10 should be 100n (C10 is not very critical though), C11 and C15 should both be 22p (pico!).
The NXP parts are generally high quality....
Forum: News 14 April 2022, 19:49
Replies: 311
Views: 26,102
Posted By Mathesar
My only concern regarding this thread is that I...

My only concern regarding this thread is that I am out of popcorn.
Forum: support.Hardware 09 April 2022, 08:33
Replies: 6
Views: 493
Posted By Mathesar
Mine get hot as well. I use the Microchip/Atmel...

Mine get hot as well. I use the Microchip/Atmel 'C' types.
Forum: support.Hardware 09 April 2022, 08:30
Replies: 53
Views: 7,797
Posted By Mathesar
I think I used a DS1000Z-20. Each tap is 4ns so...

I think I used a DS1000Z-20. Each tap is 4ns so by using the second tap you get 8ns. However, it didn't solve my issue completely.
At first, back in 2019, after all the debugging with the...
Forum: News 09 April 2022, 08:00
Replies: 311
Views: 26,102
Posted By Mathesar
Hitachi! H8S by any chance? I actually liked that...

Hitachi! H8S by any chance? I actually liked that CPU a lot. 8 32bit register that could be reused as 16 16bit registers or 8 16bit registers + 16 8bit registers. Plenty of room thus to store your...
Forum: News 05 April 2022, 13:58
Replies: 311
Views: 26,102
Posted By Mathesar
I hear what you are saying. I'm in the same boat....

I hear what you are saying. I'm in the same boat. I don't do ANY assembly code anymore nowadays. The compiler is doing a good enough job in 99.9% of the cases. It's just that, on occasion, I do had...
Forum: News 05 April 2022, 12:24
Replies: 311
Views: 26,102
Posted By Mathesar
of course, we are talking about optimizing code...

of course, we are talking about optimizing code for a 060 or 080 chip here. But these are all "microcontroller" class cpu's in today's world.

Does anyone know Lofar? operated by Astron in the...
Forum: News 05 April 2022, 10:30
Replies: 311
Views: 26,102
Posted By Mathesar
But isn't that a problem of the fact that 68K...

But isn't that a problem of the fact that 68K compilers are kinda old now? Compilers for ARM and X86 are actively being developed and they have become much better over the years. Although one still...
Forum: News 05 April 2022, 09:49
Replies: 311
Views: 26,102
Posted By Mathesar
point in case: int8_t Mul_8 (int8_t a,...

point in case:

int8_t Mul_8 (int8_t a, int8_t b)
{
return (a*b);
}

Compiles to:

26:main.c **** int8_t Mul_8 (int8_t a, int8_t b)
Forum: News 05 April 2022, 09:26
Replies: 311
Views: 26,102
Posted By Mathesar
When's the last time you looked at compiled code,...

When's the last time you looked at compiled code, again? A compiler will typically eliminate the upconversion and downconversion.

[/QUOTE]
Meynaf is right in some cases, but it is more of a...
Forum: News 03 April 2022, 20:36
Replies: 311
Views: 26,102
Posted By Mathesar
In some way he is right, the multiple memory...

In some way he is right, the multiple memory banks are a pain to work with on the typical DSP processor. On the other hand, 56/64 bit accumulators, fast MAC instructions, bit reverse adressing, pre...
Forum: News 03 April 2022, 02:39
Replies: 311
Views: 26,102
Posted By Mathesar
Agreed, please go on. Both gentlemen clearly know...

Agreed, please go on. Both gentlemen clearly know a thing or two about processors, coding and instruction sets and such which makes the discussion very interesting on a technical level.
Forum: Hardware mods 02 April 2022, 20:58
Replies: 184
Views: 40,429
Posted By Mathesar
It is true that the timing of the clock doubler...

It is true that the timing of the clock doubler is very dependent on the tolerance of the VCO in the 4046 chip. The VCO needs to run at 7MHz when the VCO control voltage is around half the supply...
Forum: Amiga scene 02 April 2022, 20:37
Replies: 50
Views: 5,585
Posted By Mathesar
O yeah, those were nice!

O yeah, those were nice!
Forum: Amiga scene 02 April 2022, 08:24
Replies: 50
Views: 5,585
Posted By Mathesar
Looking forward to it. :great Show us what...

Looking forward to it. :great

Show us what our old miggy's can do!
Forum: Amiga scene 30 March 2022, 20:08
Replies: 26
Views: 1,791
Posted By Mathesar
I think my story is similar to yours. After...

I think my story is similar to yours. After Commodore's demise I kept using my Amiga as long as I could for "serious" stuff. The last switch I made was from an A1200 (bppc/bvision!) to a second-hand...
Forum: Amiga scene 19 March 2022, 07:27
Replies: 325
Views: 27,319
Posted By Mathesar
An Amiga (as we know it) is by design very much...

An Amiga (as we know it) is by design very much tied to it's chipram. A 14MHz 68000 on ECS makes absolutely no sense without any fastram.
If Commodore would have added a 14MHz 68000 to the A600 it...
Forum: support.Hardware 19 March 2022, 07:03
Replies: 32
Views: 3,847
Posted By Mathesar
I used the internal 2-pin connector.

I used the internal 2-pin connector.
Forum: support.Hardware 25 February 2022, 18:56
Replies: 40
Views: 2,873
Posted By Mathesar
Hmmm, I have also used those round pins a lot and...

Hmmm, I have also used those round pins a lot and never had any trouble with them. There exist very thin round pins but you have them solder correctly because they have a thick and a thin side. The...
Forum: support.Hardware 24 February 2022, 21:20
Replies: 20
Views: 1,593
Posted By Mathesar
Fwiw, I had SCSI problems as well with my A3000...

Fwiw, I had SCSI problems as well with my A3000 with the A3660. It manifested itself after a while as the system warmed up. In the end I replaced just Ramsey with a version 7 which fixed it. I am now...
Forum: Amiga scene 14 February 2022, 11:17
Replies: 127
Views: 9,942
Posted By Mathesar
I would also say forget about AAA. Just make an...

I would also say forget about AAA.
Just make an AA chipset with enormous bandwidth so that the CPU can access it as fast as it would access fast ram, superfast blitter, built-in scan doubler /...
Forum: Amiga scene 13 February 2022, 08:29
Replies: 78
Views: 5,679
Posted By Mathesar
Another factor is that Nintendo and Apple for...

Another factor is that Nintendo and Apple for example, still exist. So, there is still a modern user base who, in the future, might be interested in the history of their platform. And, there is still...
Forum: Amiga scene 11 February 2022, 08:28
Replies: 1,345
Views: 290,752
Posted By Mathesar
I like your map. Very creative use of the...

I like your map. Very creative use of the capabilities of the engine, especially toward the exit of the level with the corridor around the open area.

I also agree with Tsak, although the full Doom...
Forum: Amiga scene 07 February 2022, 15:58
Replies: 1,345
Views: 290,752
Posted By Mathesar
Unbelievable! :shocked

Unbelievable! :shocked
Forum: support.Hardware 24 January 2022, 12:25
Replies: 2
Views: 268
Posted By Mathesar
My plastic liner has no slots at all. Probably a...

My plastic liner has no slots at all. Probably a "bug" from Commodore.
The bottom ventilation slots are basically for show. :)
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