A1000 Motherboard ram.

whiteb · 22 April 2010, 10:11

Hi

Just had an urge to open my A1000, that I was given. Something stood out at me looking at the motherboard.

on the Amiga Hardware database sites, that have pictures of the motherboard shows 8x41464 chips (two banks of 4), making 256KB of Ram.. so far.

This one, has THREE layers, of 8x41464 Dram chips, now, as far as I am aware, that means, with the 256KB front door expansion, the A1000, has 1MB of Ram ?

I have absolutely no idea of what it does to Chipram, have not had the chance to put it on Monitor or TV and load Workbench...

Anyone seen such a mod ?

Zetro welcome for the Hardware Pron.

Toni Wilen · 22 April 2010, 20:19

It is most likely 512K fast ram (possibly "slow" ram) expansion. A1000 Agnus is 512k chip only.

There was similar expansion design printed in finnish magazine and If I remember correctly, it was non-autoconfig. (It was mapped at 0x180000, not sure.. I think I still have the magazine somewhere..)

whiteb · 23 April 2010, 01:54

Quote:

Originally Posted by Toni Wilen

It is most likely 512K fast ram (possibly "slow" ram) expansion. A1000 Agnus is 512k chip only.

There was similar expansion design printed in finnish magazine and If I remember correctly, it was non-autoconfig. (It was mapped at 0x180000, not sure.. I think I still have the magazine somewhere..)

Hmmm, interesting stuff. I know at least the A1000 works, it powers up, and then does the magic Jingle on the Audio out.

T_hairy_bootson · 23 April 2010, 04:16

I remember talking to a guy at Maxwells (big amiga shop in Melbourne) back in the day about upgrading my a1000 to a megabyte (512kb chip+512kb fast) and he mentioned a piggyback hack the techs could do if I really wanted. I think I just bought some games instead.

whiteb · 23 April 2010, 04:26

Quote:

Originally Posted by T_hairy_bootson

I remember talking to a guy at Maxwells (big amiga shop in Melbourne) back in the day about upgrading my a1000 to a megabyte (512kb chip+512kb fast) and he mentioned a piggyback hack the techs could do if I really wanted. I think I just bought some games instead.

This would have more than likely been done in Perth, the guy who I got it from, had a load of books from shops in Perth (Given I moved from Perth, I know the shops), and the machine has a Perth repair center sticker on it (No longer trading).

I guess one day I will have to load up Workbench and see what it tells me. I never seen it piggy backed like that before though.

22 April 2010, 10:11	#1
whiteb Fanatically Amiga. Join Date: Apr 2002 Location: Melbourne, Victoria, Australia Age: 54 Posts: 1,557	A1000 Motherboard ram. Hi Just had an urge to open my A1000, that I was given. Something stood out at me looking at the motherboard. on the Amiga Hardware database sites, that have pictures of the motherboard shows 8x41464 chips (two banks of 4), making 256KB of Ram.. so far. This one, has THREE layers, of 8x41464 Dram chips, now, as far as I am aware, that means, with the 256KB front door expansion, the A1000, has 1MB of Ram ? I have absolutely no idea of what it does to Chipram, have not had the chance to put it on Monitor or TV and load Workbench... Anyone seen such a mod ? Zetro welcome for the Hardware Pron.

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22 April 2010, 20:19	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,503	It is most likely 512K fast ram (possibly "slow" ram) expansion. A1000 Agnus is 512k chip only. There was similar expansion design printed in finnish magazine and If I remember correctly, it was non-autoconfig. (It was mapped at 0x180000, not sure.. I think I still have the magazine somewhere..)

23 April 2010, 04:16	#4
T_hairy_bootson Workbitch 1.3 Join Date: Oct 2001 Location: Melbourne, Australia Age: 46 Posts: 2,084	I remember talking to a guy at Maxwells (big amiga shop in Melbourne) back in the day about upgrading my a1000 to a megabyte (512kb chip+512kb fast) and he mentioned a piggyback hack the techs could do if I really wanted. I think I just bought some games instead.

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