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Forum: Hardware pics 11 February 2010, 04:23
Replies: 7
Views: 3,066
Posted By narmi
The Rev 6a schematics I have list R401 as a 4.7...

The Rev 6a schematics I have list R401 as a 4.7 ohm 1/2 watt part. Could someone with a 6a board can confirm? R401, R405, R406, and R408 are all the same in my schematic, so you could look at those...
Forum: Hardware pics 24 January 2010, 00:13
Replies: 75
Views: 30,594
Posted By narmi
Thank you for that information. I had not...

Thank you for that information. I had not realized that the LMH6722 did not operate on +/-12V supplies, so it looks like the EL2045 (http://www.intersil.com/products/deviceinfo.asp?pn=EL2045) is...
Forum: Hardware pics 21 January 2010, 04:30
Replies: 75
Views: 30,594
Posted By narmi
Can we keep this thread on topic please? ...

Can we keep this thread on topic please?

@pbareges: I haven't yet figured out how much these will cost to build. When I do I'll post that here. I'm willing to build and sell them provided that...
Forum: Hardware pics 20 January 2010, 06:27
Replies: 75
Views: 30,594
Posted By narmi
If you want to build it yourself, here is the...

If you want to build it yourself, here is the schematic I copied from my notebook. The only difference between this and the prototype is the op-amp. The prototype uses four single op-amps while I...
Forum: Hardware pics 20 January 2010, 05:45
Replies: 75
Views: 30,594
Posted By narmi
The output from this adapter has the same timing...

The output from this adapter has the same timing as the input from the Amiga. The only change is a color space conversion from RGB to YPrPb. It's purely mathematical. Here are the equations I have...
Forum: support.Hardware 18 January 2010, 00:58
Replies: 9
Views: 3,594
Posted By narmi
The images are still up, here are the links from...

The images are still up, here are the links from the a.org post:

http://www3.telus.net/narmi/a1000piggyback/1mbA10001.jpg

http://www3.telus.net/narmi/a1000piggyback/1mbA10002.jpg
...
Forum: Hardware pics 12 January 2010, 06:45
Replies: 75
Views: 30,594
Posted By narmi
A520? That would be freaking huge :). This is...

A520? That would be freaking huge :). This is the board layout I finished yesterday.

http://www3.telus.net/narmi/yprpb-brd1.png

It's about 2x2" in size. I'm still waiting for parts so that I...
Forum: Hardware pics 31 December 2009, 06:24
Replies: 39
Views: 5,035
Posted By narmi
Hot glue can be removed with rubbing (isopropyl)...

Hot glue can be removed with rubbing (isopropyl) alcohol. Just pour some on, wait a minute, and peel off the glue. The glue comes off very easily, and the alcohol will evaporate on it's own.
Forum: Hardware pics 31 December 2009, 04:28
Replies: 75
Views: 30,594
Posted By narmi
No, this circuit won't convert between PAL and...

No, this circuit won't convert between PAL and NTSC, but if you had a TV which would sync to a PAL signal fed in via the component inputs, this would allow you to connect your Amiga io it.

That...
Forum: Hardware pics 31 December 2009, 02:47
Replies: 75
Views: 30,594
Posted By narmi
Amiga RGB to YPrPb convertor

I started this project a long time ago, around the time I built my other adaptor (http://eab.abime.net/showthread.php?t=30752). But this one is better. Finally, I can connect my Miggy to my lovely...
Forum: Hardware pics 16 August 2009, 01:55
Replies: 432
Views: 141,437
Posted By narmi
Nice work! I'm amazed that this thread is still...

Nice work! I'm amazed that this thread is still alive. I never did get around to finishing the second adapter I made. The PCB is all soldiered, but the case is not finished - I still need to buy a...
Forum: support.Hardware 27 January 2008, 07:11
Replies: 33
Views: 3,563
Posted By narmi
I'm tempted to buy one of these for my A600: ...

I'm tempted to buy one of these for my A600:

http://www.dealextreme.com/details.dx/sku.10310

It looks like it could be mounted to the HD cradle and connected with the original cable. Neat and...
Forum: support.Hardware 28 November 2007, 01:49
Replies: 9
Views: 3,594
Posted By narmi
A1000 1MB piggyback hack

Earlier today I posted scans of an article in Amazing Computing (from 1987) that details how to upgrade a stock A1000 to 1MB of RAM. I posted the links in a thread over at a.org...
Forum: Hardware pics 23 November 2007, 21:15
Replies: 100
Views: 33,042
Posted By narmi
I suspect the pinout would be similar to the...

I suspect the pinout would be similar to the expansion port of the A1200. It might be easier to make an adapter board to allow A1200 accelerators to be attached.
Forum: support.Hardware 21 November 2007, 07:09
Replies: 717
Views: 193,495
Posted By narmi
The cheapest adapter I could find is this one for...

The cheapest adapter I could find is this one for only $2 shipped (http://www.dealextreme.com/details.dx/sku.711). I made a 44-pin to 40-pin adapter cable and installed it in my A600. Works great.
Forum: Amiga scene 14 November 2007, 21:42
Replies: 13
Views: 2,007
Posted By narmi
I had the same problem with my A600, so I drilled...

I had the same problem with my A600, so I drilled new holes into the bracket to match the screw holes in the HD. The original holes don't match up with newer drives.

I really do like your guide,...
Forum: Hardware pics 01 November 2007, 04:27
Replies: 432
Views: 141,437
Posted By narmi
@zetr0 The AD8073 is available at Digikey...

@zetr0

The AD8073 is available at Digikey (AD8073JRZ (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=AD8073JRZ-ND) and AD8073JNZ...
Forum: support.Hardware 29 October 2007, 20:44
Replies: 15
Views: 1,674
Posted By narmi
PayPal is easiest. If you PM me your address, I...

PayPal is easiest. If you PM me your address, I can figure out how much postage will be.
Forum: support.Hardware 28 October 2007, 19:00
Replies: 15
Views: 1,674
Posted By narmi
I have 8 caddies, but nothing to use them with (I...

I have 8 caddies, but nothing to use them with (I used to have a drive in my PC that used them). If you want them, I'll let you have them for the cost of postage.
Forum: Hardware pics 28 October 2007, 18:54
Replies: 432
Views: 141,437
Posted By narmi
The Atari video port has seperate HSYNC and VSYNC...

The Atari video port has seperate HSYNC and VSYNC outputs, which the AD724 will happily accept and combine into CSYNC internally (my original design did this). The only thing missing is a 5V supply...
Forum: Hardware pics 28 October 2007, 01:27
Replies: 432
Views: 141,437
Posted By narmi
Nice work Zetr0! I just got around to etching two...

Nice work Zetr0! I just got around to etching two boards myself today. This time I used glossy photo paper for the transfer and it turned out really well. If you need any more parts, PM me soon...
Forum: support.Hardware 14 October 2007, 02:41
Replies: 41
Views: 4,794
Posted By narmi
Unfortunately I've been very busy for the last...

Unfortunately I've been very busy for the last few weeks, so I don't have anything working yet. All I have is this teaser picture (http://www3.telus.net/narmi/fastram_teaser.jpg) :). It's going to...
Forum: Hardware pics 03 October 2007, 04:36
Replies: 432
Views: 141,437
Posted By narmi
No problem, just send a PM. I'm looking foward...

No problem, just send a PM. I'm looking foward to the pics!

I've also been juggling projects, and a new job, so I've been pretty busy lately. I hope to post something new this weekend.
Forum: support.Hardware 25 September 2007, 04:56
Replies: 674
Views: 219,762
Posted By narmi
Have you tested the rom file with WinUAE? I have...

Have you tested the rom file with WinUAE? I have a few 40.63 roms from various sources, but I could only get one to work with my Kickflash. The bad roms didn't work with WinUAE either.
Forum: Hardware pics 25 September 2007, 02:25
Replies: 432
Views: 141,437
Posted By narmi
@nujack: I think you'll need a PAL version, but...

@nujack: I think you'll need a PAL version, but I'm not sure. I don't know what clock frequency (/CCK) a German A4000 will output on the video port when it shows an NTSC screenmode. I'll have to...
Forum: support.Hardware 25 September 2007, 02:12
Replies: 2
Views: 945
Posted By narmi
The signal for the activity LED comes from the...

The signal for the activity LED comes from the drive (or CF card in your case). Your adapter card might not have that pin connected from the CF card to the 44-pin connector. It's pin 39 on the IDE...
Forum: HOL suggestions and feedback 22 September 2007, 05:48
Replies: 10
Views: 2,538
Posted By narmi
I actually have this game. The disk label says...

I actually have this game. The disk label says "(C) 1984, 1986 Atari Games Corporation and Electronic Arts". The packaging is marked "Package design (C) 1986 by Electronic Arts.", and there are...
Forum: support.Hardware 21 September 2007, 19:45
Replies: 28
Views: 3,222
Posted By narmi
I should probably check my A600 as well, and its...

I should probably check my A600 as well, and its power supply. Commodore never paid extra for high quality components.
Forum: Hardware pics 19 September 2007, 02:30
Replies: 432
Views: 141,437
Posted By narmi
@alexh: do you have a link to get the board for...

@alexh: do you have a link to get the board for $40? I would pay $40 for an SD/FF.

@hurtz, and anybody else who wants an NTSC-only board:
PM me with the number of boards you want, and your...
Forum: Hardware pics 18 September 2007, 17:19
Replies: 432
Views: 141,437
Posted By narmi
The Amiga has digital outputs as well, the RGBI...

The Amiga has digital outputs as well, the RGBI outputs are on pins 7, 8, 9, & 6 of the 23-pin connector. The Amiga Hardware Reference Manual doesn't say what the voltage levels are, but it does say...
Forum: Hardware pics 18 September 2007, 07:07
Replies: 432
Views: 141,437
Posted By narmi
@mrodfr Heat is not an issue, the maximum...

@mrodfr

Heat is not an issue, the maximum current draw for the AD724 is only 42mA, at 5V that's only 0.21 watts. Also, that amount of current can easily be drawn from the video port, no external...
Forum: Hardware pics 14 September 2007, 04:18
Replies: 432
Views: 141,437
Posted By narmi
I think the H & V syncs need to be buffered...

I think the H & V syncs need to be buffered before they go to the VGA port. I don't know why, but C= did do so in their adapters (schematic...
Forum: Hardware mods 14 September 2007, 03:52
Replies: 106
Views: 31,868
Posted By narmi
You're missing a couple of connections, Zetro. ...

You're missing a couple of connections, Zetro. Pins 9 & 10 need to be joined, as well as 12 & 13. Those two gates are being used as inverters (saves adding another chip to the design). You also...
Forum: support.Hardware 14 September 2007, 03:23
Replies: 20
Views: 2,928
Posted By narmi
Very nice. If I had an A570 I would buy one.

Very nice. If I had an A570 I would buy one.
Forum: Hardware mods 10 September 2007, 19:28
Replies: 106
Views: 31,868
Posted By narmi
It's posted now, see my previous post.

It's posted now, see my previous post.
Forum: Hardware mods 09 September 2007, 20:45
Replies: 106
Views: 31,868
Posted By narmi
My explanation is not 100% correct. I was just...

My explanation is not 100% correct. I was just reading the Amiga Hardware Reference Manual which explains the correct way to take over the bus. I'll make a circuit and post it later on. The...
Forum: Hardware mods 09 September 2007, 20:28
Replies: 383
Views: 326,969
Posted By narmi
I use mine in my A500 to avoid wear and tear on...

I use mine in my A500 to avoid wear and tear on the original drive. Try it and let us know!
Forum: support.WinUAE 08 September 2007, 02:45
Replies: 3
Views: 1,802
Posted By narmi
Thanks Toni :great.

Thanks Toni :great.
Forum: Hardware mods 07 September 2007, 07:31
Replies: 10
Views: 1,992
Posted By narmi
I'm glad you can't see my desk :shocked.

I'm glad you can't see my desk :shocked.
Forum: support.Hardware 07 September 2007, 04:14
Replies: 23
Views: 2,219
Posted By narmi
I assume you are using a 2.5" drive, since 3.5"...

I assume you are using a 2.5" drive, since 3.5" drives require 5V and 12V power supplies (PS/2 port only has a 5V line). I don't think a PS/2 port is designed to source enough current to power a HD,...
Showing results 1 to 40 of 92

 
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