Amiga 500 2mb chip mode done

[Deling]

Few weeks ago I made 2mb chip in my Amiga 2000
today is turn to Amiga 500 2mb chip mod
here are few photos showing after mode done
Amiga 500 work excellent
mod is very simple and cheap

 

[CaptainHIT]

Cool!

HTC One cihazımdan Tapatalk kullanılarak gönderildi

 

[hsc]

How you do that mod? Can you explain us Thanks

Enviado desde mi GT-I9300 mediante Tapatalk

 

[Deling]

here is instruction

http://www.a1k.org/forum/showpost.php?p=476268&postcount=63

 

[dimfil]

here is instruction

http://www.a1k.org/forum/showpost.php?p=476268&postcount=63

Interesting!
Although, the picture needs registration to be seen...
Could you please write some words of your own experience to help us?

 

[Deling]

you need
1-Amiga 500 mobo rev 8 with 8375 agnus
2- R2 = 68 ohm resistor
3- R1 - 1k ohm resistor
4- D1 D2 = 2x V4148 diode ( 1N4148 )
5-4 chip 1Mx4b memory chip for example TC514400AP-80 or KM44C1000AP-8
-Or soj to dip adapter and memory from some old graphic card or old simm
for example Panasonic mn414400Csj-06

Memory chip you can buy from amibayer LTAC
original 20DIP



after operation
you have to change few jumper
JP3 - desolder
JP4 near U32 chip - you have to solder upper pads
JP2 near AGNUS


thats all

 

[TjLaZer]

Where do the 4 additional chips go? In the empty slots?

 

[Deling]

no ,you have to desolder old chip

MOD is very simple I recommend this MOD because original Mini Megi cost price is very high about 100-150 eu

this mod is about 15 eu for all

resistors I found in old damage Amiga 500 rev6 mobo there is few 1K and 68 Ohm

 

[roy_bates]

you dont need a mini mega for a 500+ it already supports 2mb of chipram.

also,there was another way to get it to 2mb as well as this way.which involved mounting another 8 256x4 dip ram ics over the old ones

 

[Deling]

thats true

 

[lurch]

That's an Amiga 500 plus which doesn't need to be modded. Just purchase a 1MB expansion done.

 

[Deling]

what ) ??? are you kidding ? really ?
that is impossible
please see my photo again !!

 

[demolition]

That's an Amiga 500 plus which doesn't need to be modded. Just purchase a 1MB expansion done.

It's an A500+ board but not an A500+ as it is missing some components compared to a 500+ which is the 4 RAM chips plus the interface chips. If you add them, you can make it into a 1MB board and then add 1MB in the trapdoor to make it 2MB. All that will be more expensive than this.

 

[Deling]

exactly !!