Apollo1260 + extra SIMM: contiguous RAM? (+ thank you Dimlow!)

Quagliarulo · 19 March 2010, 16:10

Hello everyone,
I added the extra SIMM socket to my Apollo 1260. My goal (obviously) is to get a total of 64 Mb by putting two 32 Mb SIMMs. Since I only have one 32 Mb SIMM and some 4 Mb SIMMs at the moment, I made some tests, mainly to try out the new socket.
I noticed that I always get two separate RAM chunks. Will I get a single 64 Mb chunk with two 32 Mb SIMMs installed?

PS: I bought this accelerator card 5 or 6 years ago as "tested and working" for 200 € but it didn't work: there were some broken traces on it. Someone had (unsuccessfully) tried to repair them and put a rock-hard transparent glue on that spot. With much effort, I removed the glue but I was unable to make the necessary bridges, because the traces disappeared under the processor socket. Some weeks ago, I was looking for some schematics (again) and stumbled upon a thread about an Apollo 1240 being upgraded to 1260. There were lots of pictures of the board with the processor desoldered: bingo! I made the bridges by soldering some enameled wire on some vias and processor pins and it worked perfectly.
Thank you Dimlow, you're the man!

Dimlow · 20 March 2010, 07:48

I believe that the Max Memory you can put in the Apollo is 32Mb, then again i could be wrong, its been a while. Maybe its 32Mb per simm socket

Glad the pictures help, thats why i did it.

EDIT, i should read posts properly before i post. The amount of times i have edited this one today!!! ill just leave it as it is.

Cosmos · 20 March 2010, 09:56

One Apollo saved ! Good news !

rkauer · 20 March 2010, 23:26

As far I remember, with two SIMM sockets the Apollo can have 64Mb of contigous RAM, but only when using two 32Mb modules.

Dimlow · 22 March 2010, 23:32

Right, got my Amiga's out and have checked, its 32Mb per simm as rkauer correctly points out.

jbenam · 23 March 2010, 01:46

Good work!

Just reading this makes me want to repair my Apollo 1240... If only I could supply a F74 locally

I just forget every single time to fill up an online order

Just noticed you're from Italy, and from the same city as me, too

Dimlow · 23 March 2010, 09:16

I will post one to you for free 74AC74

Quagliarulo · 23 March 2010, 12:46

Quote:

Originally Posted by jbenam

Just noticed you're from Italy, and from the same city as me, too

Paisà!!!

Quagliarulo · 09 April 2010, 14:05

Just installed 2x32Mb SIMMs and got 64 contiguous Mbytes

8bitbubsy · 10 April 2010, 00:04

This is so tempting, but too sad the acc won't fit in the standard case if you add another SIMM slot

Philophus · 10 April 2010, 00:16

Quote:

Originally Posted by 8bitbubsy

This is so tempting, but too sad the acc won't fit in the standard case if you add another SIMM slot

It does.....you just cant have a simm in it

19 March 2010, 16:10	#1
Quagliarulo Registered User Join Date: Mar 2010 Location: Napoli, Italia Posts: 76	Apollo1260 + extra SIMM: contiguous RAM? (+ thank you Dimlow!) Hello everyone, I added the extra SIMM socket to my Apollo 1260. My goal (obviously) is to get a total of 64 Mb by putting two 32 Mb SIMMs. Since I only have one 32 Mb SIMM and some 4 Mb SIMMs at the moment, I made some tests, mainly to try out the new socket. I noticed that I always get two separate RAM chunks. Will I get a single 64 Mb chunk with two 32 Mb SIMMs installed? PS: I bought this accelerator card 5 or 6 years ago as "tested and working" for 200 € but it didn't work: there were some broken traces on it. Someone had (unsuccessfully) tried to repair them and put a rock-hard transparent glue on that spot. With much effort, I removed the glue but I was unable to make the necessary bridges, because the traces disappeared under the processor socket. Some weeks ago, I was looking for some schematics (again) and stumbled upon a thread about an Apollo 1240 being upgraded to 1260. There were lots of pictures of the board with the processor desoldered: bingo! I made the bridges by soldering some enameled wire on some vias and processor pins and it worked perfectly. Thank you Dimlow, you're the man!

20 March 2010, 07:48	#2
Dimlow Likes to be thought of as Join Date: May 2008 Location: Kent,UK Age: 55 Posts: 529	I believe that the Max Memory you can put in the Apollo is 32Mb, then again i could be wrong, its been a while. Maybe its 32Mb per simm socket Glad the pictures help, thats why i did it. EDIT, i should read posts properly before i post. The amount of times i have edited this one today!!! ill just leave it as it is. Last edited by Dimlow; 20 March 2010 at 07:58.

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20 March 2010, 09:56	#3
Cosmos Banned Join Date: Jan 2007 Location: France Posts: 655	One Apollo saved ! Good news !

20 March 2010, 23:26	#4
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	As far I remember, with two SIMM sockets the Apollo can have 64Mb of contigous RAM, but only when using two 32Mb modules.

22 March 2010, 23:32	#5
Dimlow Likes to be thought of as Join Date: May 2008 Location: Kent,UK Age: 55 Posts: 529	Right, got my Amiga's out and have checked, its 32Mb per simm as rkauer correctly points out.

23 March 2010, 01:46	#6
jbenam Italian Amiga Zealot Join Date: Jan 2009 Location: Italy Age: 36 Posts: 1,911	Good work! Just reading this makes me want to repair my Apollo 1240... If only I could supply a F74 locally I just forget every single time to fill up an online order Just noticed you're from Italy, and from the same city as me, too

23 March 2010, 09:16	#7
Dimlow Likes to be thought of as Join Date: May 2008 Location: Kent,UK Age: 55 Posts: 529	I will post one to you for free 74AC74

09 April 2010, 14:05	#9
Quagliarulo Registered User Join Date: Mar 2010 Location: Napoli, Italia Posts: 76	Just installed 2x32Mb SIMMs and got 64 contiguous Mbytes

10 April 2010, 00:04	#10
8bitbubsy Registered User Join Date: Sep 2009 Location: Norway Posts: 1,711	This is so tempting, but too sad the acc won't fit in the standard case if you add another SIMM slot

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