Amiga 500 ram?

[Lord Aga]

Wait wait waitwaitwait waiwaiwai
ALL 1MB trapdoor expansions for A500+ will appear as +1MB Chip ? Resulting in 2MB Chip total ?

My A500 has a 1MB Agnus but I'm not interested in modifying my 512+512 A500 in any way. Just curious about beefing up an A500+.

[AmiDude]

I don't know what you mean by "trap door memory hack", because personally I won't consider this;

http://amiga.resource.cx/exp/a504plus

as a hack. I actually happen to own one of these, and it worked straight away as 2Mb Chip RAM expansion. No other mods required, because A500Plus has 2Mb Agnus from factory. Good luck finding one.

I've had an A504plus in my A500+ and it gives 4MB Fast RAM memory.
See link:
http://www.amiga-hardware.com/showhardware.cgi?HARDID=929

[Zac67]

A hack - by definition - is making your hardware do something that wasn't intended by the developers.

So, all trapdoor expansions larger than 512 KB (A500) or  1 MB (A500+) are hacks. They require an adapter fitted to Gary (changing system logic) and running a cable from it to the trapdoor card (for the additional address lines). The additional RAM beyond the 'official' size is always Slow aka Pseudo Fast RAM (=slow as Chipmem but not usable as such).

No hack is modifying a previously 512 KB Chip / 512 KB Slow mem motherboard to 1 MB Chipmem (by replacing Agnus and changing two jumpers). It's a simple mod that was largely intended by the developers.

[Jiffy]

Wait wait waitwaitwait waiwaiwai
ALL 1MB trapdoor expansions for A500+ will appear as +1MB Chip ? Resulting in 2MB Chip total ?

My A500 has a 1MB Agnus but I'm not interested in modifying my 512+512 A500 in any way. Just curious about beefing up an A500+.

Yes. All 1 MB trapdoor expansions for the A500+ will appear as +1MB Chip (making 2 MB chip in all) in all A500+ machines. That is what they were intended and designed for.

[Lord Aga]

Oh, alrighty then