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Forum: support.Hardware 29 May 2020, 12:04
Replies: 16
Views: 570
Posted By hooverphonique
The resistor is probably ok, but in parallel with...

The resistor is probably ok, but in parallel with something else that provides a similar resistance relative to +5V. I suspect you either have a direct short to GND somewhere, or a component is...
Forum: support.Hardware 28 May 2020, 16:12
Replies: 16
Views: 570
Posted By hooverphonique
Did you fix the reset line? If it's floating, it...

Did you fix the reset line? If it's floating, it can cause excessive power consumption in the input circuitry of chips relying on this signal. Also, your computer won't work properly.
Forum: support.Hardware 23 May 2020, 16:59
Replies: 4
Views: 230
Posted By hooverphonique
I think the TF uses proper auto-config, so you...

I think the TF uses proper auto-config, so you shouldn't get an overlap - some of the TF's support using an address range outside 24 bits for its onboard ram (so you could keep all 8MB of SCRAM) ,...
Forum: Coders. Asm / Hardware 22 May 2020, 21:06
Replies: 11
Views: 443
Posted By hooverphonique
You can do conditional stuff in a makefile based...

You can do conditional stuff in a makefile based on host OS (https://stackoverflow.com/questions/714100/os-detecting-makefile).
Forum: Retrogaming General Discussion 19 May 2020, 12:05
Replies: 312
Views: 18,219
Posted By hooverphonique
IIRC, a lot of demoscene productions use this...

IIRC, a lot of demoscene productions use this kind of interleaving for performance - basically you do stuff while waiting for a write to chipmem to complete.
Forum: Retrogaming General Discussion 18 May 2020, 17:12
Replies: 312
Views: 18,219
Posted By hooverphonique
I'm not sure.. Does an Amiga with an 030 have...

I'm not sure.. Does an Amiga with an 030 have RTG? Even if it does, doing bytewise accesses over the Zorro bus to adjacent addresses will slow things down significantly compared to pairing the data.
Forum: Retrogaming General Discussion 18 May 2020, 16:03
Replies: 312
Views: 18,219
Posted By hooverphonique
On an Amiga, you wouldn't use move.b, but move.l...

On an Amiga, you wouldn't use move.b, but move.l for this.
Forum: support.Games 18 May 2020, 10:46
Replies: 25
Views: 886
Posted By hooverphonique
What else do you have in your startup-sequence?...

What else do you have in your startup-sequence? Could be something related to AGA screen modes/registers.
Forum: Coders. System 18 May 2020, 10:44
Replies: 3
Views: 262
Posted By hooverphonique
Yes, you can use graphics.library operations to...

Yes, you can use graphics.library operations to write directly to a RastPort.
Forum: Retrogaming General Discussion 17 May 2020, 17:27
Replies: 26
Views: 1,538
Posted By hooverphonique
http://www.pouet.net/prod.php?which=81051

http://www.pouet.net/prod.php?which=81051
Forum: support.Other 15 May 2020, 15:22
Replies: 9
Views: 399
Posted By hooverphonique
The block number of the root block (normally 880)...

The block number of the root block (normally 880) is in the bootblock though - is this not honoured by AmigaDOS, so you could put the root block on track 0?
Forum: support.Other 14 May 2020, 11:16
Replies: 2
Views: 183
Posted By hooverphonique
As far as I've understood, SMR shouldn't be a...

As far as I've understood, SMR shouldn't be a problem unless you're rebuilding a RAID array. I don't have any personal experience with this though.
Forum: support.Hardware 13 May 2020, 15:39
Replies: 6
Views: 351
Posted By hooverphonique
Regarding 2. I think it is usable as actual chip...

Regarding 2. I think it is usable as actual chip ram, but the OS will not allocate it as such because it is detected (via cpu) to sit at C00000, thus addresses in this range will never be used as...
Forum: support.Hardware 11 May 2020, 16:07
Replies: 29
Views: 755
Posted By hooverphonique
They would most likely be programmed differently,...

They would most likely be programmed differently, so don't swap them!
Forum: support.Hardware 11 May 2020, 14:06
Replies: 29
Views: 755
Posted By hooverphonique
Of course I would be eager to try it out as well...

Of course I would be eager to try it out as well :)

My point was, don't go making mods/upgrades when troubleshooting, because they may cause additional issues, making it harder to diagnose.


...
Forum: support.Hardware 11 May 2020, 12:18
Replies: 4
Views: 244
Posted By hooverphonique
There's plenty of options for 20 ohm @ 1W in 2512...

There's plenty of options for 20 ohm @ 1W in 2512 package - they're even available as 3.5W.

I can't tell you what wattage the original A4000 part is though - that would require the OEM BOM.
Forum: Hardware mods 11 May 2020, 12:11
Replies: 24
Views: 1,247
Posted By hooverphonique
I'm not sure, but the file extension and the...

I'm not sure, but the file extension and the 'PIN..' syntax could indicate that the source file is for atmel WinCUPL.

Sprint PLDASM also uses a .pld extension, but I couldn't verify the language...
Forum: support.Hardware 11 May 2020, 12:00
Replies: 29
Views: 755
Posted By hooverphonique
I don't understand why you would mess with...

I don't understand why you would mess with installing a new fpu if the card isn't working at 50MHz without it - don't complicate things when troubleshooting :-)

Also, it doesn't matter whether the...
Forum: support.Hardware 09 May 2020, 12:59
Replies: 10
Views: 343
Posted By hooverphonique
The thing is, there will be voltage drop across...

The thing is, there will be voltage drop across the pcb inside the Amiga, and the input voltage needs to be high enough so the lowest voltage anywhere on the pcb is enough for the logic to function...
Forum: Hardware mods 09 May 2020, 12:18
Replies: 24
Views: 1,247
Posted By hooverphonique
The 20 pin PALs (20xy) all have 10 inputs and 8...

The 20 pin PALs (20xy) all have 10 inputs and 8 outputs. "R4" means that 4 of the outputs are registered (has a flipflop). An "L8" has no registered outputs.


All common DRAMs work in this...
Forum: support.Hardware 09 May 2020, 12:10
Replies: 10
Views: 343
Posted By hooverphonique
5.14V (5V+3%) will be fine. I would be more...

5.14V (5V+3%) will be fine.
I would be more suspicious of the 4.85V on the Meanwell - if that gets any lower, it might cause issues..
Forum: Coders. Asm / Hardware 06 May 2020, 11:15
Replies: 16
Views: 1,034
Posted By hooverphonique
The kickstart will try to detect up to 4 floppy...

The kickstart will try to detect up to 4 floppy drives, if that's what you meant. For DF1+, it pulses the corresponding SEL and listens for a pulse train returned from the drive on RDY - this...
Forum: Hardware mods 06 May 2020, 11:08
Replies: 301
Views: 33,600
Posted By hooverphonique
Paula takes care of floppy data I/O, so I don't...

Paula takes care of floppy data I/O, so I don't understand why a reimplementation of Gary would help there.

Also, where would you get the extra DMA slots needed for increased floppy bandwidth?
Forum: Coders. Asm / Hardware 05 May 2020, 13:18
Replies: 16
Views: 1,034
Posted By hooverphonique
The CIA doesn't form any pulses. As mentioned...

The CIA doesn't form any pulses. As mentioned above, it's just simple GPIO controlled by the CPU.

Paula is not involved in anything regarding selecting, stepping, motor control, etc.
Forum: support.Hardware 22 April 2020, 17:35
Replies: 52
Views: 3,212
Posted By hooverphonique
It's different for each system how much delay the...

It's different for each system how much delay the CLK90 signal actually needs for the system to be stable (it doesn't have to be exactly 90 degress).
My A4000 w/ A3640 can run @ 35 MHz with the...
Forum: support.Hardware 21 April 2020, 14:55
Replies: 52
Views: 3,212
Posted By hooverphonique
the delay line does not set the clock speed, it...

the delay line does not set the clock speed, it skews the clock 90 degrees for the CLK90 signal - how much 90 degrees is, depends on the clock; for A3640/A4000 mobo (25MHz), it's 10ns.


The delay...
Forum: support.Hardware 21 April 2020, 12:31
Replies: 52
Views: 3,212
Posted By hooverphonique
The chip next to the oscillator is the delay...

The chip next to the oscillator is the delay line, though, not the divider.
Forum: support.Hardware 20 April 2020, 13:01
Replies: 7
Views: 362
Posted By hooverphonique
If they are scrap boards, using a heat gun on the...

If they are scrap boards, using a heat gun on the back side is by far the quickest/easiest way of getting such connectors off - and by "heat gun" I don't mean a hot air soldering tool.
Forum: support.Hardware 20 April 2020, 10:36
Replies: 52
Views: 3,212
Posted By hooverphonique
Could you verify you have 25MHz clocks on the...

Could you verify you have 25MHz clocks on the center pin of both jumpers when set to int?
I'm wondering if the original tap 3 on the delay line is bad and that's why they used tap 2, and therefore...
Forum: Coders. C/C++ 17 April 2020, 11:49
Replies: 3
Views: 555
Posted By hooverphonique
As far as I know (with any of the official C= OS...

As far as I know (with any of the official C= OS releases, atleast), it isn't possible - you need to close the window and reopen it somewhere else.
Forum: support.Hardware 16 April 2020, 12:32
Replies: 52
Views: 3,212
Posted By hooverphonique
The mobo EP8700 does nothing when the jumpers are...

The mobo EP8700 does nothing when the jumpers are set to EXT, though. @25MHz, the period is 40ns, so to get a 90 degree skew, CLK90 should go to the 10ns (40ns/(360/90)) tap, but maybe somebody...
Forum: support.Hardware 15 April 2020, 16:52
Replies: 52
Views: 3,212
Posted By hooverphonique
Both jumpers need to be EXT for A3640. They have...

Both jumpers need to be EXT for A3640. They have nothing to do with FPU, but set whether the motherboard is clocked from its own oscillator or the cpu board in the cpu slot.
Forum: Coders. System 13 April 2020, 16:48
Replies: 7
Views: 657
Posted By hooverphonique
If you are doing this purely to get the "sound"...

If you are doing this purely to get the "sound" of the amiga narrator, maybe you could find an x86 implementation that generates the same sound, considering C= licensed the speech tech from a third...
Forum: Retrogaming General Discussion 30 March 2020, 13:30
Replies: 312
Views: 18,219
Posted By hooverphonique
Without looking at them, the victory "dance"...

Without looking at them, the victory "dance" might just be playback of static data, thus allowing more processor time for rendering more polygons..
Forum: Coders. Asm / Hardware 17 March 2020, 17:47
Replies: 26
Views: 1,755
Posted By hooverphonique
I didn't mean the same type of chip by a...

I didn't mean the same type of chip by a different manufacturer, but any chip using the I2C protocol (and not necessarily an eeprom either) :)
Forum: Coders. Asm / Hardware 17 March 2020, 17:35
Replies: 26
Views: 1,755
Posted By hooverphonique
If you think the explanation is bad, just find...

If you think the explanation is bad, just find one for a different I2C part, the protocol is always the same.

Read the I2C wiki page (https://en.wikipedia.org/wiki/I%C2%B2C), it has a specific...
Forum: Coders. Asm / Hardware 11 March 2020, 10:03
Replies: 11
Views: 720
Posted By hooverphonique
V36 is kickstart 2.0 (or unfinished versions of...

V36 is kickstart 2.0 (or unfinished versions of 1.4).
Forum: Coders. Asm / Hardware 08 March 2020, 12:48
Replies: 10
Views: 689
Posted By hooverphonique
You're right, and then it will be 16 bytes...

You're right, and then it will be 16 bytes "wasted".. 8 as actual available storage, and 8 for the size and next pointer.
Forum: Coders. Asm / Hardware 07 March 2020, 20:43
Replies: 10
Views: 689
Posted By hooverphonique
Except it would be 12 bytes ;)

Except it would be 12 bytes ;)
Forum: Nostalgia & memories 05 March 2020, 22:43
Replies: 33
Views: 1,728
Posted By hooverphonique
Why am I in confinement? Was I infected with...

Why am I in confinement? Was I infected with COVID-19?
Showing results 1 to 40 of 1095

 
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