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[lordv]

I've just made such a beast! Look for photos here: http://www.amiga.org.ru/forum/viewtopic.php?p=12045
It autoconfigures!
Still some troubles with memory chips, i'm afraid some are slightly dead.

[Trev]

In my opinion, what truly makes the whole project work is the pin-up girl on the floppy drive. ;-)

[DJBase]

PCMCIA Port will be dead then right?

[lordv]

DJBase wrote:
PCMCIA Port will be dead then right?

Dunno :-\
Currently only 4Mb are used (4th chip is very bad). It autoconfigures at $200000-$5FFFFF address range. 8Mb would autoconfigure at $200000-$9FFFFF.

Afaik pcmcia address range is somewhere in $Exxxxx or smth...

[lordv]

Trev wrote:
In my opinion, what truly makes the whole project work is the pin-up girl on the floppy drive. ;-)

[rkauer]

Where can I find this project?

[countzero]

wow, total awesomeness ! great job dude ! I have some questions for you,

1- how many layers is the PCB ?
2- What's the chip in the PLLC socket ?
3- How the hell did you solder that SMD PLLC socket for the 68000 ?
4- What's the name of the chick on the floppy drive ? (you should consider naming this project after her !)

[fiat1100d]

countzero wrote:

2- What's the chip in the PLLC socket ?

Seems to be some ALTERA CPLD.

Will you consider making some kits available for sale? Great job for expanding A600s without needing an accelerator! :-)

[lordv]

The project will be open-source as soon as I finish testing board/swapping memory chips. I'll release schematics, PCB, source code for CPLD as well as programming file for it.

The PCB is mere 2-layer with 0.2mm clearances/copper trace widths.
The chip is Altera EPM7064S now, while EPM7032S or Atmel ATF1502 are planned for release (1502 is the same as 7032s, but you need to converse programming file from altera format to atmel format).
SMD-PLCC sockets have holes in its bottoms http://www.isa-elektronik.de/wgr/wg017/PLCC-SMD-drw1.png , so you can solder them easily with thin enough soldering iron. But for this board, to ensure good contact, you must break off socket bottom, bend its pins and solder it with some angle to plane (board). I'll make more photos soon =) Probably it's the most odd part of project

Dunno about kits. The problem mostly with DRAM chips, which could be only taken from 4 or 8Mb simms (2 or 4 chips/simm).

[lordv]

4- What's the name of the chick on the floppy drive ? (you should consider naming this project after her !)

Dunno :-\
This is from previous owner =)

[willow]

Great pictures! I also noticed your 72pin SIMM trapdoor expansion. May I ask if your trapdoor expansion works to 1Meg? The reason I ask is that I was considering soldering a 72pin direct to the trapdoor expansion of my a600 but I found that the 72pin SIMMS did not have the /OE line - because of this I desoldered a 4MB DRAM chip from a 72pin SIMM (the individual DRAM has the OE line) and soldered (what I thought from the schematics) MA9 on the trapdoor to only realise that the schematic diagrams for the A600 are wrong and address line 9 is not connected at the trapdoor slot (expansion connector pin 32 )so I only got 0.5MB of extra ram since the DRAM chip only has one RAS line..... so if the /OE line is not needed on the 72pin SIMM then I can solder a 72pin simm directly to the trapdoor slot expansion and wire the RA0/RA1 lines to the correct points on the SIMM... does this make sense to you or if not do you have details of your SIMM->TRAPDOOR expansion as shown in your released picture? Many thanks, Paul.

[Crumb]

Impressive job!!!an autoconfig ram board for A600 sounds great!!!

Just curious... Do you know if adding a 020 would add too much complexity to your design? Anyway great job!

:cheers:

[skurk]

Awesome! I want one (provided that it doesn't disable my PCMCIA port)

[lordv]

Sure you don't need /OE pin, you can place it to GND.

For 72pin simm, there is no exact schematics, but try looking here http://groups.google.com/group/fido7.ru.amiga/msg/c4b788490e24bfc4?dmode=source&output=gplain , unfortunately in russian only ;-) This is what I've used while soldering my extra chip MEG =)

If you already have one megabit chip soldered, consider soldering another over the top of it (not soldering /RAS pin).

PS: when joining together SIMM data bus (d0 to d16, d1 to d17 etc, needed only for 1 and 4Mb), beware of wrong SIMM routing, when not d0-d15 come from single chip but d0-d7,d16-d23 instead. The rule: both of bus signals being joined together must be from different chips.

[lordv]

Just curious... Do you know if adding a 020 would add too much complexity to your design? Anyway great job!

I'm afraid it would be totally new design...