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Search: Posts Made By: Krashan
Forum: support.Hardware 14 September 2020, 16:44
Replies: 9
Views: 399
Posted By Krashan
68020 processor has 32-bit data bus. It means it...

68020 processor has 32-bit data bus. It means it can read/write 4 bytes at once. This bus physically is just 32 wires. Older A1200s (rev 1D) have four chips of 16-bit data bus (256k × 16 bits). Two...
Forum: support.Hardware 11 September 2020, 13:49
Replies: 9
Views: 399
Posted By Krashan
It can't. A1200 has either 256k×16 bit memory...

It can't. A1200 has either 256k×16 bit memory chips (so it needs at least two to run, with 1 MB chip RAM then) or 512k×8 (in this case four chips are needed).
Forum: support.Hardware 10 September 2020, 21:57
Replies: 8
Views: 255
Posted By Krashan
True. 32-bit interface is also explicitly...

True. 32-bit interface is also explicitly mentioned in the specification.
Forum: support.Hardware 09 September 2020, 17:15
Replies: 13
Views: 545
Posted By Krashan
If not UNC 4/40, then probably M3.

If not UNC 4/40, then probably M3.
Forum: Hardware mods 06 September 2020, 12:12
Replies: 41
Views: 1,493
Posted By Krashan
Shorten the cable between PSU and Amiga and/or...

Shorten the cable between PSU and Amiga and/or use one with thicker wires. My PSUs have just 50 cm of shielded 4×1.0 mm² cable.
Forum: Hardware mods 01 September 2020, 07:54
Replies: 41
Views: 1,493
Posted By Krashan
I would adjust the voltage under load (with Amiga...

I would adjust the voltage under load (with Amiga connected) and in the Amiga itself, so voltage drop along the cable between PSU and Amiga is compensated.
Forum: support.Hardware 22 August 2020, 10:19
Replies: 13
Views: 545
Posted By Krashan
3 mm is external diameter of the thread. 6 mm is...

3 mm is external diameter of the thread. 6 mm is screw length excluding the head. An example: https://www.tme.eu/en/details/b3x6_bn82428/screws/bossard/3160639/
Forum: support.Hardware 21 August 2020, 08:21
Replies: 13
Views: 545
Posted By Krashan
In original A1200, two screws are self-tapping...

In original A1200, two screws are self-tapping for plastic and they are 3×6 mm. They are inserted from the top and go into lower half of the enclosure.

The third screw near PCMCIA slot is another...
Forum: Amiga scene 18 August 2020, 19:24
Replies: 20
Views: 1,464
Posted By Krashan
I agree, also antialiasing only makes sense on...

I agree, also antialiasing only makes sense on direct pixel-color screens, which excludes all the Amiga chipsets and 8-bit screens on RTG.
Forum: Amiga scene 18 August 2020, 08:54
Replies: 20
Views: 1,464
Posted By Krashan
No. Subpixel rendering may be used to improve...

No. Subpixel rendering may be used to improve antialiasing, but is not a requirement. Moreover, subpixel rendering only makes things worse, when logical pixels are not identical to physical LCD...
Forum: Amiga scene 15 August 2020, 14:45
Replies: 11
Views: 875
Posted By Krashan
Start looking for 68060 accelerator...

Start looking for 68060 accelerator...
Forum: Hardware mods 05 August 2020, 13:19
Replies: 36
Views: 2,472
Posted By Krashan
But still a new PCB is better than repaired one....

But still a new PCB is better than repaired one. And, in most cases, also less expensive.
Forum: support.Hardware 12 July 2020, 22:40
Replies: 4
Views: 336
Posted By Krashan
The problem is not in their size. Multilayer...

The problem is not in their size. Multilayer ceramic capacitors of this capacity are made of X7R material, which is highly nonlinear to temperature and voltage across the element. When MLCC capacitor...
Forum: support.Hardware 11 July 2020, 20:26
Replies: 8
Views: 365
Posted By Krashan
I have a similar one and it is working without...

I have a similar one and it is working without any problems. However it only accepts cards up to 2 GB. 4 GB and bigger ones are not recognized.
Forum: support.Hardware 21 June 2020, 20:08
Replies: 1
Views: 200
Posted By Krashan
Just select 60 Hz output modes in Indivision...

Just select 60 Hz output modes in Indivision prefs for all Amiga modes you use.
Forum: support.Hardware 10 June 2020, 18:11
Replies: 8
Views: 669
Posted By Krashan
Audio outputs from Paula are present on the turbo...

Audio outputs from Paula are present on the turbo card slot of Amiga 1200, so there is no need for piggybacking.
Forum: support.Hardware 11 March 2020, 19:43
Replies: 4
Views: 472
Posted By Krashan
It can be harmed (or rather data on it, not the...

It can be harmed (or rather data on it, not the card itself) if you manage to switch off the Amiga during pending write operation.
Forum: Coders. General 07 March 2020, 20:33
Replies: 2
Views: 622
Posted By Krashan
One can use datatype system on AmigaOS 3.0+.

One can use datatype system on AmigaOS 3.0+.
Forum: support.Hardware 04 March 2020, 12:10
Replies: 3
Views: 382
Posted By Krashan
I doubt it will help in this case. Looks like...

I doubt it will help in this case. Looks like some serious hardware fault, maybe broken one bit of chipset data path.
Forum: support.Hardware 16 February 2020, 22:03
Replies: 24
Views: 1,147
Posted By Krashan
You can try with poor man's degaussing loop. Get...

You can try with poor man's degaussing loop. Get a transformer soldering gun and fit a "tip" in a shape of small circle (diameter about 3 cm). Then use it as normal loop, just remember it is very...
Forum: Hardware mods 19 January 2020, 20:58
Replies: 10
Views: 928
Posted By Krashan
I have outsourced printing to specialists in...

I have outsourced printing to specialists in printing on plastics. So this is kind of printing, all I can say.
Forum: Hardware mods 19 January 2020, 18:49
Replies: 10
Views: 928
Posted By Krashan
Yes, I have decided to go with 7U spacebar and...

Yes, I have decided to go with 7U spacebar and alter layout a bit. On the other hand I can get whatever legends I want on the keycaps as well.

http://cdn.rastport.com/var/keycaps.jpg
Forum: Hardware mods 18 January 2020, 18:07
Replies: 10
Views: 928
Posted By Krashan
My bet is they are not cheap. I have started my...

My bet is they are not cheap. I have started my design in March 2019, now working on fifth version (rev. E) of the prototype. I do have working and fully usable rev. D prototype in my A1200, but it...
Forum: Hardware mods 18 January 2020, 15:30
Replies: 10
Views: 928
Posted By Krashan
Things are being worked on at rastport.com, but...

Things are being worked on at rastport.com, but it is a bit too early for official announcement. I prefer to have everything ready and tested, before going public.
Forum: Coders. Scripting 18 December 2019, 14:59
Replies: 2
Views: 1,295
Posted By Krashan
ShowConfig?

ShowConfig?
Forum: Amiga scene 08 December 2019, 12:54
Replies: 41
Views: 5,829
Posted By Krashan
Just wanted to check if my first place still...

Just wanted to check if my first place still holds ;-), but there is Network Error reported. Other network apps like AmIRC or FTP work, so I suspect some problem on the server side.
Forum: Hardware mods 05 December 2019, 07:48
Replies: 163
Views: 74,832
Posted By Krashan
Anything that will rise high level on pin 39...

Anything that will rise high level on pin 39 (ACTIVE) from 3.3 to 5.0 V. MOS transistor, LS or HCT non-inverting logic gate... Example schematic diagram here: https://rastport.com/products/KA47/
Forum: support.Hardware 27 November 2019, 08:52
Replies: 7
Views: 603
Posted By Krashan
VGA Modes is just a window of Indivision Prefs...

VGA Modes is just a window of Indivision Prefs tool. One opens it via menu item.

The best mode to use depends on your personal preferences. Amiga cannot produce 1920×1080 video, so there has to be...
Forum: Hardware mods 05 November 2019, 14:31
Replies: 30
Views: 5,220
Posted By Krashan
In case of A1200 there is only one free...

In case of A1200 there is only one free connection in the matrix (matrix is 15 columns by 6 rows). However it seems the MPU does not generate any code for it.
Forum: support.Hardware 27 October 2019, 20:33
Replies: 7
Views: 542
Posted By Krashan
As two KA60 gave the same negative result (and...

As two KA60 gave the same negative result (and each piece is tested before shipping to distributors), one should consider two other possibilities:
1. Damaged SD2IDE converter.
2. Damaged LED...
Forum: support.Hardware 25 October 2019, 22:56
Replies: 7
Views: 542
Posted By Krashan
Can you provide a photo how it is mounted in your...

Can you provide a photo how it is mounted in your Amiga (also with SD2IDE adapter connected)?
Forum: support.Hardware 22 September 2019, 10:42
Replies: 26
Views: 1,746
Posted By Krashan
I see two problems here. 1. Using very high...

I see two problems here.

1. Using very high resolutions you can easily run out of chip memory. For example, for 1280×1024 each screen bitplane takes 160 kB. So 8 color screen eats almost ¼ of the...
Forum: support.Hardware 12 September 2019, 10:13
Replies: 26
Views: 1,746
Posted By Krashan
Indi AGA has no sync to Amiga vertical blanking,...

Indi AGA has no sync to Amiga vertical blanking, so getting 50 Hz is moot point. I've done some experiments. For example managed to get 50.014 Hz refresh, but then scroll tearing was more noticeable...
Forum: support.Hardware 09 September 2019, 09:38
Replies: 26
Views: 1,746
Posted By Krashan
If you want to have full size image, pixel exact,...

If you want to have full size image, pixel exact, without borders, go for 1280×1024 display. It means 17" or 19" with 5:4 ratio. DVI input is a must, as it gives you full control over image...
Forum: support.Hardware 31 August 2019, 21:21
Replies: 18
Views: 678
Posted By Krashan
My way to do it: 1. Hot air handle mounted...

My way to do it:

1. Hot air handle mounted in retort stand, set to 160°C, heating the PCB from the bottom side (mainboard placed upside down), preheating for 5 minutes.
2. Apply gel flux to the...
Forum: Hardware mods 31 August 2019, 21:12
Replies: 4
Views: 901
Posted By Krashan
This usually won't help, or just make artifacts...

This usually won't help, or just make artifacts to appear a few minutes later. This is my story of fixing this problem: https://rastport.com/techblog/removing-aga-display-trashes/
Forum: Hardware mods 05 August 2019, 08:18
Replies: 6
Views: 816
Posted By Krashan
It does, at least v 2.3. A few notes from some...

It does, at least v 2.3. A few notes from some octave below ProTracker range are mapped to "Play Song", "Play Pattern", "Pause", "Stop" and "Record".
Forum: Hardware mods 17 July 2019, 17:26
Replies: 11
Views: 1,694
Posted By Krashan
One can buy all of these on AliExpress. Price...

One can buy all of these on AliExpress. Price highly depends on quantity and buyer location.
Forum: Hardware mods 16 July 2019, 12:50
Replies: 11
Views: 1,694
Posted By Krashan
From my tests it turns out that maximum cable...

From my tests it turns out that maximum cable length depends on kind and model of PCMCIA card connected. For example my PCMCIA to SD card adapter worked on 25 cm cable, while network card didn't. The...
Forum: Hardware mods 16 July 2019, 09:52
Replies: 11
Views: 1,694
Posted By Krashan
PCMCIA plug, for example Molex 146749-4. Note...

PCMCIA plug, for example Molex 146749-4. Note that regular female pin header 2×34, 1.27 mm pitch won't work, due to different pin diameter. Checked it for myself.
PCMCIA socket, I use Molex...
Showing results 1 to 40 of 73

 
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