ACA500 with 2 MB fastRAM + Kipper2k 4 MB fastRAM expansion work simultaneously?

[Motormouth]

I don't have a kipper2k, Though I would not mind one.
A conventional 8meg Fast ram address space is from 20000 to 9FFFFF.  If the Kipper2k 4megs of ram uses the conventional address space there should be no memory addressing problems.  Especially since it should be autoconfig space.  It is not like you have a bridgeboard or a zorro II graphics card that is taking up autoconfig memory space.  As long as you stay under 8megs total you should be ok.
The bigger concern for the ACA500 is that it does not like 68000 socket accelerators.  It can be damaged by them.  I don't know if the kipper2k would have the same issue or not?  I don't expect  the kipper2k to effect bus timing etc., but I would check with Jens or Amigakit or someone here at Amiga.org to find out for sure.  We don't want you to damage your Amiga.

As for the ACA500, its fastram is mapped to C00000 or what is referred to "slow ram".  This was done for game compatibility. some old games expect ram at the C00000 address.  
But don't fret.  The ACA500's ram even though mapped to "slow ram" is is very fast, Faster than typical 100-120ns fast ram.  

I don't know if the ACA500's "slow" fast ram would allow you to get above the 8meg auto configuration space or not.  ie 8megs of fast ram some "slow" fast ram.   Some of the trapdoor memory expansions "do" allow for this (like the Adram 540, but the some of this ram is not autoconfigurable and needs a patch program to be run to make this happen).  But eitherway the configuration you are speaking of is below the 8meg limit anyway.

If you put an ACA500 on an A500+ that only has one meg of chip ram the ACA500 can be configured to make the one meg of its ram become mapped as "chip ram" for of a total of 2 megs of chip ram plus one meg of "slow" fast ram.  This is also true for a 1meg Agnus with only 512k of chip ram.  512k of the ACA500 ram can be mapped at chip ram.  The ACA500 would be left with 1.5 megs of "slow" fast ram.

If you can get a hold of an ACA500 (I think they are out of production), I would highly recommend it.   I have one on my A500+ with one of Jens's A1233,  The combination is significantly faster than a stock A3000.

Either way I agree with you I cannot wait for the ACA500plus or the Vampire 500.  I expect both to be awesome.

[Motormouth]

The bigger concern for the ACA500 is that it does not like 68000 socket accelerators.  It can be damaged by them.  I don't know if the kipper2k would have the same issue or not?  I don't expect  the kipper2k to effect bus timing etc., but I would check with Jens or Amigakit or someone here at Amiga.org to find out for sure.  We don't want you to damage your Amiga.

before you get the kipper2k with 4 megs of ram and the ACA500 make sure that the kipper2k will not damage the ACA500.  

Thanks.

17 May 2014 16:38 http://eab.abime.net/printthread.php?t=71495&pp=20&page=22
ACA500 work with other CPU socket 2 MB SRAM expansion with A500+ 2 MB chipram, 6 MB RAM OK:
http://i294.photobucket.com/albums/mm105/fitzsteve/Amiga/P1070222-1024_zpsb949912f.jpg
http://i294.photobucket.com/albums/mm105/fitzsteve/Amiga/P1070219-1024_zpsa570fc03.jpg
http://i294.photobucket.com/albums/mm105/fitzsteve/Amiga/IMAG1116_zpsa3dd0b29.jpg
ACA500 RAM C00000-D7FFFF 1,5 MB and 980000-9FFDFF 0,5 MB? 2 MB SRAM 200000-3FFFF7? 2 MB chipRAM (000000-1FFFFF) OK with ACA.
http://i294.photobucket.com/albums/mm105/fitzsteve/Amiga/IMAG1118_zps5c83838d.jpg

What is the ACA500plus specifications (130 €)? 4 MB RAM? Faster CPU, 25 MHz?
http://www.vesalia.de/e_aca500plus.htm
The ACA500 bad way (A1200 expansion connector).

The Vampire II 128 MB RAM too big, no A500 version.

I did not find ONE card which can be used normally. 2 MB fastRAM too little.
This would be the good system all in 1, side expansion card format, A500:
Fast  68000-68020 (25-50 MHz) CPU, min. 4-8 MB fastRAM, work with A500+ 2 MB chipRAM, sum  6-10 MB RAM possible, fast (min. 4-10 MB/s read with 25-50 MHz CPU, ACA 2 MB/s only) IDE controller with CF card, KS 1.3+3.1, max. 150 €.

"slow ram" can actually be mapped from C00000 to DBFFFF which is about 1.8 meg of ram.  The realtime clock is at DC0000 and chip registers at DFF000.

As for 8megs of ram in the 24-bit address space, it only has 16 bit wide transfers.    If you have a 32 bit processor with an full 68020 or above (not a 68EC020) you are going to want 32 bit memory.  You don't want to cripple your 32 bit process with just 16 bit ram.  As the transfers should be much faster and double the width.  the theoretical memory address space is 4 Gigs.  Though in reality zorro III can handle about 1 gig, if my memory is correct,  and 128 megs of ram in an A3000-A4000 fast slot,(note: this should be double checked).  32 megs of 32bit ram should be plenty under OS 3.9, unless you are doing something memory intensive.

[Motormouth]

A500+ max. 2 MB slow RAM = chipRAM possible. The Agnus 2 MB only.
ACA500 C00000 1,8 MB slow RAM how?

Kipper 4 MB RAM speed? ACA500 2 MB RAM speed?

This right? The kipper card seller said it:
"The aca500 don't work with kipper2k fastram. The aca500 use external cpu and set off the internal cpu, the internal expansion from kipper2k is connected on to internal cpu."

Is the most important problem not the 2+4 MB fastRAM addresses?
If ACA500 = 4 MB fastRAM, then not problem. I would have bought a ACA500 already (no kipper card). 2 MB fastRAM + 2 MB chipRAM too little to WHDload. I tested.

What is the ACA500plus specifications (130 euro)? 4 MB RAM? Faster CPU, 25 MHz?
http://www.vesalia.de/e_aca500plus.htm

From a physical point of view trap door slow ram and chip ram where physically the same types of chips with the same type of speed.
However Chip ram and slow ram are not equal from an addressing point of view.  Chip ram address starts at 000000 vs C00000 for slow ram.  What make chip ram so important is that the custom chips can directly address chip ram whereas slow and fast ram need to hit the CPU to be addressed.  This is why Chip ram is so important for video.

a common configuration for old pre ECS A500s was 512k chip and 512k "slow" ram.  Which is why many older games expect "slow" ram.    The addition of true "16 bit fast" ram does give the A500s or A2000 a bit of a kick over having just slow ram. you can see this the difference in Sysinfo or other benchmarks.  Most version 6a and newer A500s have ECS Agnuses.  Most of these A500s have been modified to have 1 meg of chip ram and no "slow" fast ram.

[Motormouth]

Originally c00000 appears to have been real fast ram that was supported by an a1000 expansion that looks remarkably similar to the ranger prototype (and in some official documentation is referred to as ranger ram). Supporting it in fat agnus seems to have been a direct response to the fighting going on at the time.

OT ranger rambling....

The UHRES registers in ECS/AGA appear on the face of it to be the VRAM that Jay was going on about. He did say the chips were finished. I don't know what agnus chips got them.

This is quite interesting.... particularly with the real fast ram being at C00000 in the A1000.  I never got to play with an A1000.  The first Amiga I programmed was an early vintage (1987 ish) A2000HD with a 2090a hard drive controller and 2 megs of fast ram.  Except for the buster and zorro II bus they were near identical to the A500.  The addresses I was quoting should work with the A2000 and A500.