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Offline _caddy_Topic starter

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a1200 internal keyboard
« on: September 06, 2005, 01:38:56 PM »
is there any way of extending the green ribbon cable on the a1200?

i need it to be about 3 inches longer, so i can stick everything in the case
A1200 in original casing
Internal
4.3gb hard drive // 24x cdrom // clock port Hypercom1 // floppy drive
External
3 floppy drives, and a 3 Com Etherlink 3 PCMCIA Ethernet Card
 

Offline patrik

Re: a1200 internal keyboard
« Reply #1 on: September 06, 2005, 02:08:54 PM »
@_caddy_:

If it is a 3.5" harddrive you are trying to fit, it is probably easier to get a 2.5" harddrive instead of trying to extend the foil-cable. Such a drive can be bought second hand for very little money.


/Patrik
 

Offline Piru

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Re: a1200 internal keyboard
« Reply #2 on: September 06, 2005, 03:08:43 PM »
@_caddy_

Not that I know of.

You could replace the keyboard matrix with that of a A500 keyboard, and then use the A500 keyboard MPU.. Then you'd need only 5 wires, + wires for the leds. This hack requires some soldering to the motherboard though, so unless if you feel comfortable soldering wires to SMC mounted components, don't bother.
 

Offline Doobrey

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Re: a1200 internal keyboard
« Reply #3 on: September 06, 2005, 05:32:12 PM »
Or if you don't like the idea of soldering on the motherboard, you could solder to the back of a PLCC socket and push it over the CIA chip.
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Offline _caddy_Topic starter

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Re: a1200 internal keyboard
« Reply #4 on: September 07, 2005, 12:11:32 AM »
but would the 500 keyboard fit the 1200 case - with other stuff inside?

i'm trying to do an all in one wedge 1200, and i have it currently so that everything will fit, bar about 3 inch of keyboard ribbon, and its annoying that it doesnt fit
i was wondering wether it'd be feasable, because i already have parts to do this.
A1200 in original casing
Internal
4.3gb hard drive // 24x cdrom // clock port Hypercom1 // floppy drive
External
3 floppy drives, and a 3 Com Etherlink 3 PCMCIA Ethernet Card
 

Offline AmigaEd

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Re: a1200 internal keyboard
« Reply #5 on: September 07, 2005, 01:33:26 AM »
Perhaps you could find an old VCR or DVD player that has been thrown in the bin. It might have some ribbon that you could use to extend the keyboard ribbon with.

It will be a bit tricky to solder but it is certainly possible.

-AmigaEd
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Offline retro_cade

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Re: a1200 internal keyboard
« Reply #6 on: September 07, 2005, 01:51:15 AM »
if its a normal a1200 case.. you can take out the metal sheilding put paper or other stuff over the mobo and put a 3.5" hd in there and the keybaord ribbon fits nicely over the top and round the side of the hd into the interface.

so you may not need to extend your keybaord ribbon.

I have an A1200 with 30gb 3'5" hd and slim samsung cd-rw modded on the left side at the back/top.

I used a 2.5" to 2x 3.5" cable of ebay and a little 3.5" to slim cd pcb adapter and idefix97

the A500 keyboard and the A1200 keyboard are identical silouets of eachother the difference is that there is a onboard controller and leds on the 500 one and the 1200 hasent plus there is a mysterious blank key next to the left shift key on the 1200 but this doesnt matter an 1200 keyboard will fit perfectly in an a500 case, but the only problem it the back of the case and wires but there would be enough space for other cool things.
 
 

Offline Piru

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Re: a1200 internal keyboard
« Reply #7 on: September 07, 2005, 02:25:29 AM »
Quote
but would the 500 keyboard fit the 1200 case - with other stuff inside?

The keyboards are identical, except for the MPU unit on the A500 keyboard right top corner, and that the A500 keyboard doesn't have the ribbon cable the A1200 one has. Also the A1200 keycaps are whiter than the A500 ones.

I solved this by opening the keyboard and replacing the A1200 keyboard matrix (the ribbon is part of it) with the A500 one. I then got nice white keycaps and A500 MPU unit I could wire to my A1200 motherboard.

http://www.iki.fi/sintonen/tmp/keyb_front_1_s.jpg
http://www.iki.fi/sintonen/tmp/keyb_back_s.jpg

I used this to build the external keyboard for my A1200 tower, but certainly it can be used for other purposes aswell (for example if the A1200 original keyboard ribbon cable is damanged and you have spare A500s to take apart...)
 

Offline Revener

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Re: a1200 internal keyboard
« Reply #8 on: September 07, 2005, 03:30:46 AM »
Are the A500 and A1200 really identical? On a A500 I can push down multiple keys at once, if I do that on my A1200 only one key gets accepted.

Noticed this in the game North & South ages ago. When you control the cavalry you can't speed forward, steer and fence at the same time on a A1200 you can do that on a A500.

On a A500 the keyboard player even beats the joystick one easy :)
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Offline orange

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Re: a1200 internal keyboard
« Reply #9 on: September 07, 2005, 08:46:41 AM »
@Doobrey
I like your idea very much, it could be used for AT keyboard adapter, right? Is there danger of socket detaching from chip?  will any PLCC socket work?
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Offline Piru

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Re: a1200 internal keyboard
« Reply #10 on: September 07, 2005, 09:16:24 AM »
@Revener
Quote
Are the A500 and A1200 really identical?

Well, physically yes, but if you use the A500 keyboard MPU you get the "advanced" features of the A500 keyboard: Better working multiple keypresses you already mentioned, and also the  immediate reset when CTRL-A-A is hit (instead of the upto 10 sec delayed thingie A1200 has with the normal keyboard). This obviously requires you wire the RST cable properly...
 

Offline CodePoet

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Re: a1200 internal keyboard
« Reply #11 on: September 07, 2005, 11:20:57 AM »
@doobrey / orange

I cant see how that will work with a standard pcb/smt plcc socket - once you flip the socket upside down to mount on the chip, the notch is mirrored... so unless you flip the chip itself over you wont be able to mount it (Just tried it on a 49lf020a plcc flashrom)

Seen it done before, maybe they hacked up the socket to remove the notch  :-?

meh.
 

Offline Doobrey

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Re: a1200 internal keyboard
« Reply #12 on: September 07, 2005, 06:11:17 PM »
Quote

orange wrote:
@Doobrey
I like your idea very much, it could be used for AT keyboard adapter, right? Is there danger of socket detaching from chip?  will any PLCC socket work?

 Well, it's not my idea..look at the way internal scan doublers or the gayle adapter of the A1200 PowerFlyer get the signals they need.
As for a keyboard adapter, have a look at Guido Mersmann's MMKeyboard , had one hooked up to my A1200 for the last few years.
 And yes, it could come off, although you could aways use a gluegun to tack it in place.
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Offline Doobrey

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Re: a1200 internal keyboard
« Reply #13 on: September 07, 2005, 06:51:49 PM »
Quote

CodePoet wrote:
Seen it done before, maybe they hacked up the socket to remove the notch  :-?


Hmm, I dunno why you had a problem, the socket is symmetrical across the diagonal,
 I just had a look on amiga-hardware.com at the Micronik videoslot enabler and the closeup of the sockets that clip onto the video DAC and Lisa both show the corner intact.
On schedule, and suing
 

Offline _caddy_Topic starter

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Re: a1200 internal keyboard
« Reply #14 on: September 09, 2005, 01:06:56 AM »
http://www.amiga.org/gallery/images/2055/1_1791.jpg
i'm talkin something like this.......

n/m kids i think i have this sussed..... i'm just gonna need some ice cream tubs, and some hot glue....... and a lot of patients.... and possibly some dried out cork.....

i just thought that if i move it further over, it'd mess with the clock header, and the floppy power, and led header

i'm going to try and bend them a little, or find some way of connecting it differently, but, thats better than resoldering the carbon contacts in the keyboard.
and it probably means i dont have to buy any more things to do it as well, saving me trawling through ebay for months, wooot



oh, and these fit rather well, in the scsi  bit in the desktop amiga 1200's.... for those with overheating desktops
and they're very quiet too
http://cgi.ebay.co.uk/SUNON-60mm-Blower-60x60x15mm-High-Quality-Exhaust-air_W0QQitemZ6799462207QQcategoryZ42003QQcmdZViewItem
A1200 in original casing
Internal
4.3gb hard drive // 24x cdrom // clock port Hypercom1 // floppy drive
External
3 floppy drives, and a 3 Com Etherlink 3 PCMCIA Ethernet Card