18 September 2007, 12:43 | #81 |
Amiga Games Database
Join Date: Jun 2006
Location: South West England
Posts: 1,240
|
|
18 September 2007, 12:48 | #82 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
@Angus
LOL, that indeed is a sound that will haunt me for some time!!! and the heavy footed steps! clack clack clack clack..... its not wonder every room was setup and ready for the hero.... they could here him running before he got into the lift!!! |
18 September 2007, 12:51 | #83 |
.
Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
|
recently it has come to my attention, that some technician here, used an EGA->VGA converter to display the aga output from a stock A1200 to a VGA monitor... although I did not see it in action, I did saw the board, it has a vga-out and an ega-in , and some chips and some adjustment screws. the friend that had the a1200 there, told me they managed to get it working and saw 3.1 on a vga monitor! I have no reason to doubt them... I will try to find a pic of that converter...
edit: I think it was a CGA to VGA converter... edit2: yep, here it is: http://www.alibaba.com/catalog/11462...Converter.html |
18 September 2007, 12:59 | #84 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
Thats an interesting find there Keropi-stah!
*(off to lookie at linkie)* |
18 September 2007, 13:03 | #85 |
.
Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
|
maybe Alexh can tell us if it is of any use...
|
18 September 2007, 13:07 | #86 |
Amiga Games Database
Join Date: Jun 2006
Location: South West England
Posts: 1,240
|
As an aside, when I last used my 1200's RGB output, I reached the conclusion that the Reds were much weaker than they should be. The Blues and Grens seemed fine. Is this something I can fix (or get fixed) or is it just a worn out motherboard issue?
Thanks. |
18 September 2007, 13:12 | #87 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
@keropi
hmmm i have just dropped an email asking if or how it handles interlaced screens @Angus Thats something i havent noticed on my sir..... is it quite a difference ? if so then there may be some trouble... |
18 September 2007, 13:15 | #88 |
.
Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
|
here is an eBay auction with 40 of them, costing ~110$ each.... the description is ancouraging!
there are high-res picks there too... Last edited by keropi; 18 September 2007 at 13:23. |
18 September 2007, 13:27 | #89 |
Posts: n/a
|
This auction looks even closer to the current project design http://cgi.ebay.com/eBayISAPI.dll?Vi...m=150159512792 doncha think?
|
18 September 2007, 13:34 | #90 |
.
Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
|
indeed...
|
18 September 2007, 13:50 | #91 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
indeedy indeed
kinda went round the houses though when you look at it.... two crystals (one pal and one ntsc) why 12vdc input, thats interesting... for end result it seems what it is doing... is a bit over complex... but still interesting indeed... |
18 September 2007, 14:38 | #92 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,337
|
1) CGA is TTL level digital (0 to 3-5v) Amiga output is Analog (0.7v p-p)
2) CGA is 4-bit, 16-colour AGA is 24-bit, 262,144-colour http://en.wikipedia.org/wiki/Color_Graphics_Adapter It aint going to work. Last edited by alexh; 18 September 2007 at 14:45. |
18 September 2007, 14:44 | #93 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
see you mention his name... and like a super Alexh soaring throught the board... he will appear (with small added fan fare)
@Alexh I couldn`t read much off those chips to be honest so they could be almost anything all i could make out was the 5v regulator... maybe i need new glasses... hrmmm. theres enough caps on the board to make 3 of the above boards i rekon LOL... |
18 September 2007, 14:47 | #94 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,337
|
I've just re-read the spec of these things. They are NOT CGA-VGA converters. They are traditional 15KHz analog video scandoublers / deinterlacers.
They are also only 16-bit input. Plus they sell for $40 elsewhere. This is an Averlogic AL875 and an Averlogic AL250 @Genghiz That is a video encoder, it goes from RGB to Composite / Svideo and so YES it does more fit the title of this post. Damn expensive though. Last edited by alexh; 18 September 2007 at 15:04. |
18 September 2007, 15:02 | #95 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
@Alexh
that wiki link brought back some memories..... colour artifacing.... i did this when i was 11 on the spectrum 48k....... i manage to obtain 128 distinctly different colours on screen.... .... man... a long time ago..... |
18 September 2007, 17:19 | #96 | |
Guru Meditation Error
Join Date: Jun 2007
Location: Vancouver, Canada
Posts: 92
|
Quote:
|
|
18 September 2007, 18:10 | #97 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,337
|
@Narmi
You didnt read my next post. These are not CGA -> VGA adapters afterall. |
18 September 2007, 19:32 | #98 | |
Registered User
Join Date: Sep 2007
Location: IA, USA
Posts: 28
|
Quote:
Thanks. |
|
18 September 2007, 19:58 | #99 |
Registered User
Join Date: Jan 2005
Location: 62-France
Age: 56
Posts: 413
|
@Zetr0 and @narmi
thanks for the technical informations. I post some questions about for all to know the range of possibility, the advantage and all related things interesting to know about this great hardware. I have just seen there are svga, svideo and comp on the board :-) sorry but the design move and with the english sometime I lost/remember don't understand some informations. narmi external deluxe is the final name ;-) a great name, isn't it ;-) svideo and comp used at the same time on internal PCI TV card or on a LCTV monitor and I think the comp signal is this time verry good ??? also happy to know there is no need for external power supply. The actual questions I have is: - The hardware could handle well the differents PAL resolution the amiga have ???? (low, hires, interlaced,...) and a wait latency when changing the wb PAL screnmode ??? - The hardware design will protect the amiga hardware is one of the compoment stop to work ???? (just no signal and no amiga dead). sorry for my questions :-) |
18 September 2007, 21:46 | #100 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
@mrodfr
Hello there, lets see if i can clear up some confusion for you.
I hope that little bit helps. I like the name to so I do hope Narmi likes the name of the device, after all its mainly his design |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Amiga A1200 RGB & composite video problem solution! | Anemos | support.Hardware | 24 | 24 September 2015 08:36 |
Built my own: Amiga RGB to S-Video + composite adaptor small issue though... | waltermixxx | Hardware pics | 37 | 03 July 2013 04:03 |
A1200 composite/rgb video port flakey? | Amiga1992 | support.Hardware | 2 | 17 April 2012 23:44 |
RGB to S-Video / Composite Adaptor | Charlie | Hardware mods | 3 | 30 January 2011 14:13 |
For sale a NEW RGB CGA to S-Video and Composite Video converter | Vars191 | MarketPlace | 0 | 11 January 2009 05:09 |
|
|