2 mb chip ram for A600

04 February 2008, 23:15

Hello

I found this cool mod : http://a1k.org/forum/showthread.php?t=3173

I need translation to english

Any Germans around? :P

Thx

keropi · 04 February 2008, 23:24

interesting but why? those +1MB chip expansions are dead cheap AFAIK...

ppill · 05 February 2008, 00:01

That doesn't look too difficult. Did he just solder two additional chips on the top of the original ones and added extra wires?
@keropi
There are not exactly common like the A500 ones. And cost more.

05 February 2008, 08:23

Quote:

Originally Posted by keropi

interesting but why? those +1MB chip expansions are dead cheap AFAIK...

It's nearly impossible to get one here in poland and they are realy expensive

This mod is easy but i dont know where i must connect those wires

alexh · 05 February 2008, 09:33

Quote:

Originally Posted by Krisu

It's nearly impossible to get one here in poland and they are realy expensive

At €45 brand new they not earth shatteringly expensive. As to impossible to get in Poland see http://www.amigakit.com

Zetr0 · 05 February 2008, 09:42

still its an awesome HACK

gets a zetr0 vote!!!!

the next a600 i will mod in such a fashion!

coze · 05 February 2008, 10:15

I think it can be an equally difficult task to find those chips ... 256kx16 they say ?

05 February 2008, 10:51

I have four Hyundai HY514260 chips from my old AT&T socket 5 mobo

Merlin · 05 February 2008, 13:42

@ all

I asked for and got an English translation later in the thread, just beware that the CAS and RAS connections vary on the different revisions of boards.

If I can figure this out from the schematics I will post the connections later, as the photos in the thread aren't that good.

Edit: Pins 28 (Cas low) and 29 (CAS High) on the chips link to pins 35 (Cas Low) and 36 (Cas High) on the trapdoor connector - I presume that the original author has buzzed back from these trapdoor pins with a multimeter to find convenient points to solder to.

Zetr0, have you any comments about the connections?

Merlin

fryguy · 05 February 2008, 17:53

@Krisu: This aint that expensive

Merlin · 05 February 2008, 18:02

@ fryguy

Nice, but it's not available, I wonder how much they would be if they actually had any in stock?

LOL

Merlin

Zetr0 · 05 February 2008, 18:12

When i get more time i hope to do an English translation with some more schematics ;D

amigakit.com · 05 February 2008, 18:58

This is available and in stock now:

A602 CHIP RAM MEMORY EXPANSION (Amiga A600)

Memory expansion and clockport expander with 2 year warranty

Zetr0 · 05 February 2008, 19:10

@AK

indeed, i have one of these A602's on my A600+ project

and with a 2 year warrenty and a clock port thats a damn fine price

and a unit i would recommend to anyone

(and their dog lol)

but to hack is to live

............

Merlin · 05 February 2008, 22:03

.... And cheapo's rush in where angels fear to tread, eh, Zetr0?

I hack for the challenge, the cheapness is (sometimes, but not always) a bonus!!

@ AK

No offence intended, but 30 sheets versus almost zilch for some chips ripped from an obsolete video card, it's a bit of a no-brainer really if you are up to the challenge.

Hack The Planet!!!

Merlin

Zetr0 · 05 February 2008, 22:30

Quote:

Originally Posted by Merlin

.... And cheapo's rush in where angels fear to tread, eh, Zetr0?

I hack for the challenge, the cheapness is (sometimes, but not always) a bonus!!

@ AK

No offence intended, but 30 sheets versus almost zilch for some chips ripped from an obsolete video card, it's a bit of a no-brainer really if you are up to the challenge.

Hack The Planet!!!

Merlin

And i will be the one hold the schematic and passing you the soldering irons

Merlin · 05 February 2008, 22:36

OK, I have deciphered the German thread (it helps when you can speak and read German).

You "piggy back" the chips and connect all pins through except for pins 11,12,15, 28, 29 and 30. Attach some wires to pins 28 and 29 of each chip before soldering the chips into place.

Pins 28 and 29 are CAS high and low and these are the ones that have the wires coming from them. The wires from pin 28 of the new chips are connected together, the wires from pin 29 from the new chips are also connected together.

On the board shown in the thread (v1.5 I think which is the same as my board), these joined sets of wires connect to resistors R152F and R152H, which if I am correct will link to pins 35 (CAS Low) and 36 (CAS High) on the trapdoor connector. If you can't buzz this out with a multimeter, there are only two possible combinations.....

Edit: Pin 28 connects to R152F, Pin 29 connects to R152H (I have just checked the A600 schematics).

Merlin · 05 February 2008, 22:40

Quote:

Originally Posted by coze

I think it can be an equally difficult task to find those chips ... 256kx16 they say ?

Not as hard as you make it out to be. Think "old Cirrus Logic video cards", the chips are socketed making things easy for you to remove them....

I just happen to have one here.........watch all of the computer fairs and jumbles get raided for old video cards now, I must get to Bowlers on Saturday...LOL

Merlin

05 February 2008, 23:05

Thx for the reply guys

30£ for the expansion is to much. I can buy A1200 for 30£ in my country

but hack is more fun

.

Merlin · 06 February 2008, 09:28

@ Krisu

Spot on my man, if you can hack it, hack it.......

Merlin

04 February 2008, 23:15	#1
Krisu Posts: n/a	2 mb chip ram for A600 Hello I found this cool mod : http://a1k.org/forum/showthread.php?t=3173 I need translation to english Any Germans around? :P Thx

05 February 2008, 10:51	#8
Krisu Posts: n/a	I have four Hyundai HY514260 chips from my old AT&T socket 5 mobo Last edited by Krisu; 05 February 2008 at 10:57.

05 February 2008, 13:42	#9
Merlin AmiBay MegaMod Join Date: Mar 2007 Location: Manchester, UK Age: 62 Posts: 1,163	@ all I asked for and got an English translation later in the thread, just beware that the CAS and RAS connections vary on the different revisions of boards. If I can figure this out from the schematics I will post the connections later, as the photos in the thread aren't that good. Edit: Pins 28 (Cas low) and 29 (CAS High) on the chips link to pins 35 (Cas Low) and 36 (Cas High) on the trapdoor connector - I presume that the original author has buzzed back from these trapdoor pins with a multimeter to find convenient points to solder to. Zetr0, have you any comments about the connections? Merlin Last edited by Merlin; 05 February 2008 at 23:01.

05 February 2008, 22:36	#17
Merlin AmiBay MegaMod Join Date: Mar 2007 Location: Manchester, UK Age: 62 Posts: 1,163	OK, I have deciphered the German thread (it helps when you can speak and read German). You "piggy back" the chips and connect all pins through except for pins 11,12,15, 28, 29 and 30. Attach some wires to pins 28 and 29 of each chip before soldering the chips into place. Pins 28 and 29 are CAS high and low and these are the ones that have the wires coming from them. The wires from pin 28 of the new chips are connected together, the wires from pin 29 from the new chips are also connected together. On the board shown in the thread (v1.5 I think which is the same as my board), these joined sets of wires connect to resistors R152F and R152H, which if I am correct will link to pins 35 (CAS Low) and 36 (CAS High) on the trapdoor connector. If you can't buzz this out with a multimeter, there are only two possible combinations..... Edit: Pin 28 connects to R152F, Pin 29 connects to R152H (I have just checked the A600 schematics). Last edited by Merlin; 06 February 2008 at 09:27.

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04 February 2008, 23:24	#2
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	interesting but why? those +1MB chip expansions are dead cheap AFAIK...

05 February 2008, 00:01	#3
ppill CON: artist Join Date: Feb 2006 Location: Poland Age: 43 Posts: 1,250	That doesn't look too difficult. Did he just solder two additional chips on the top of the original ones and added extra wires? @keropi There are not exactly common like the A500 ones. And cost more.

05 February 2008, 09:42	#6
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	still its an awesome HACK gets a zetr0 vote!!!! the next a600 i will mod in such a fashion!

05 February 2008, 10:15	#7
coze hastala vista winny vista Join Date: Feb 2006 Location: mt fuji Age: 46 Posts: 1,335	I think it can be an equally difficult task to find those chips ... 256kx16 they say ?

05 February 2008, 17:53	#10
fryguy Registered User Join Date: Aug 2005 Location: Skarabörg, Sweden Age: 44 Posts: 1,020	@Krisu: This aint that expensive

05 February 2008, 18:02	#11
Merlin AmiBay MegaMod Join Date: Mar 2007 Location: Manchester, UK Age: 62 Posts: 1,163	@ fryguy Nice, but it's not available, I wonder how much they would be if they actually had any in stock? LOL Merlin

05 February 2008, 18:12	#12
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	When i get more time i hope to do an English translation with some more schematics ;D

05 February 2008, 18:58	#13
amigakit.com Registered User Join Date: Aug 2004 Location: www.amigakit.com Posts: 2,029	This is available and in stock now: A602 CHIP RAM MEMORY EXPANSION (Amiga A600) Memory expansion and clockport expander with 2 year warranty

05 February 2008, 19:10	#14
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@AK indeed, i have one of these A602's on my A600+ project and with a 2 year warrenty and a clock port thats a damn fine price and a unit i would recommend to anyone (and their dog lol) but to hack is to live ............

05 February 2008, 22:03	#15
Merlin AmiBay MegaMod Join Date: Mar 2007 Location: Manchester, UK Age: 62 Posts: 1,163	.... And cheapo's rush in where angels fear to tread, eh, Zetr0? I hack for the challenge, the cheapness is (sometimes, but not always) a bonus!! @ AK No offence intended, but 30 sheets versus almost zilch for some chips ripped from an obsolete video card, it's a bit of a no-brainer really if you are up to the challenge. Hack The Planet!!! Merlin

05 February 2008, 23:05	#19
Krisu Posts: n/a	Thx for the reply guys 30£ for the expansion is to much. I can buy A1200 for 30£ in my country but hack is more fun .

06 February 2008, 09:28	#20
Merlin AmiBay MegaMod Join Date: Mar 2007 Location: Manchester, UK Age: 62 Posts: 1,163	@ Krisu Spot on my man, if you can hack it, hack it....... Merlin

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