HI

I received my Amiga 500 and ACA 500 and ACA 1232 accelerators o wednesday and I have problems.This topic is about A500 games from HD,obviously with WHDLoad.

I have only 512k of Chip Ram and I have 3 games installed to test.The first one 1943 and when it tries to load it reset the Amiga and it gives me a Guru Meditation.

To solve this I have some questions: Is the Amiga 500 upgradable to 1-2 Megabytes of Chip?

Is there a solution in form of a card to increase the number of Chip KBytes?

And software?

The guys of AmigaKit told me today to go to Prefs/Workbench and change something to sort the problem but I installed OS3.9 i the last days and today and OS3.5 today and no luck.Any ideas?

Thanks in advance

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@newlight

Depends on chipset in your Amiga. ECS Agnus supports up to 2 MB Chip RAM, but your Agnus is probably OCS (512 kB). There were Agnus+Chip RAM expasion boards for A500, but these are hard to find now.

It may be easier and cheaper to simply buy A1200.

Quote:

And software?

No software needed.

@pavlor

To help Clarify, OCS Agnus 8370 (NTSC) or 8371 (PAL) can only address 512 KB of chip.

The 8372A is part of the ECS chipset and can address 1 Meg of Chipram. It also can do PAL or NTSC modes either bin Hardware or by software.

The ECS 8375 Agnus showed up on the A500 Plus and MegaChip style expansions. It can address up to 2 Megs of Chipram. There are many versions of this chip. Some not pin compatible with each other also PAL or NTSC variants.

On the Non A500 plus models such as Rev 5 or 6A, I prefer the hardware hack modification (trace cutting and solder jumper) . This adds the 512 KB of trapdoor memory as Chipram, giving you 1 Meg total. It's cheap and relatively easy to perform, especially on the Rev 6A motherboards.

Drewlio77

Last edited by Drewlio77 on 10-Feb-2017 at 08:47 PM.
Last edited by Drewlio77 on 10-Feb-2017 at 08:46 PM.

@Drewlio77

Where can I can find and Agnus 1 MB Chip Ram?

Is it avaliable on Amibay?

To install it is it pin connected or may I solder something?

Thanks

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@newlight


You need an Agnus 8372A chip. They are available on ebay. You also need a 512 KB Trap door Ram expansion card (it will be added to the 512 KB with the modification to the Amiga motherboards 512 KB giving you a total of 1 Meg of chipram). The modification depends on your Motherboard revision. Do you know what versions you have?

Drewlio77

Last edited by Drewlio77 on 11-Feb-2017 at 12:52 AM.
Last edited by Drewlio77 on 11-Feb-2017 at 12:52 AM.
Last edited by Drewlio77 on 11-Feb-2017 at 12:52 AM.

@Drewlio77

No

I will search on ebay

How can I know my Amiga 500's revision?

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@Drewlio77

Wich chip do you recommend to buy on ebay? What about this 8372A? Will this give me 1 MB of Chip Ram or more? I have 512K on my A500's trapdoor

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@newlight

I hate to say that if you have an A500 and NOT the Plus you are stuck with a maximum of 1mb, and this IF and only if expanded either with the notorious hardware hack or with a memory expansion. This is the reason i sold my original ACA500 and i don't plan to buy the second edition. Only an A500+ can fully take advantage of the new ACA500 and in any other case you can be pleased with the cf card add on, the roms that come built in and the extra ram BUT more than half of the Whdload slaves WON'T run.

_________________
Vanilla A500
NOS A1200 (Powered by V1200, CoffinOS r.58)
PowerMac beast, MorphOS 3.15 (registered)

@portarinos

I asked and I want you to answer please.

What kind of memory upgrade may I buy on ebay? What is the maximum amount of Chip Ram the Amiga 500 can afford?

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@Drewlio77

Where sjould I place the chip on the Amiga 500 motherboard? Is it sinple or complex task?

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@newlight

I am happily running Amiga WHDLoad games again!!! I downloaded the latest small user WHDLoad package,installed on my A500 and the games all run now exception of the ones they need 1 MB of ChipRam.

I played 1943,5th Gear and 4D Sport Boxing without problems except something that I corrected with the command NOVBRMOVE on the games icon infromation.

Very happy with my games and this small WHDLoad installation that at least give me the possibility to run the 512K Amiga games!!!

Now searching and asking here how can I install the ECS Agnus chip? How much ChipRam will it gives me in coordination oof the trapdoor Chip memory?

Thanks

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@newlight

As posted above a 8372A Agnus (drop-in replacement) + a 512Kb trap door + motherboard modification can give you 1Mb of Chip RAM.

However, the motherboard modification is dependent upon your motherboard revision (which is clearly printed on your A500's motherboard).

Here's an example of the modification for an A500 rev 6A motherboard...

http://www.amibay.com/showthread.php?4722-A500-(r6a)-1MB-CHIP-RAM-Modification-Caution-dialup-users-excessive-H-W-pr0n!

Last edited by nightwing on 13-Feb-2017 at 02:15 AM.
Last edited by nightwing on 13-Feb-2017 at 02:14 AM.
Last edited by nightwing on 13-Feb-2017 at 02:13 AM.

@nightwing

How can I install an 8732S chip? is it plug'n'play or may I solder it? In which or for which chip may I replace it?

My Amiga 500 is from 1990.Which revision is my Amiga?

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@newlight

Oooooh!!!

I opened the A500 case to see the revision and what happens?

Don't know why the ACA500 doesn't boot and stays at a blue screen

Why this happens? What am I doing wrong?

Can anybody help me? Thanks

_________________
AMIGA 500 1.5 MB ACA500/ACA1232 accelerators
AMIGA 500 German
CD32 unexpanded
Amiga 1200 Tower on AmigaKit since years
AMIGA 1300 030/50 Mhz/32 MB WB 3.9 with lots of games&demos
AMIGA ONE XE G3 PPC 800 Mhz/1 GB RAM/RADEON 9250 128 MB/SATA CONTROLLER

@newlight

My guess:
Battery leaking onto traces, only became a problem once you wiggled something to get the lid off. Would have failed you shortly in any case.

Unless you fiddled with the lid with power on

What was your revision, btw?

_________________
This weeks pet peeve:
Using "voltage" instead of "potential", which leads to inventing new words like "amperage" instead of "current" (I, measured in A) or possible "charge" (amperehours, Ah or Coulomb, C). Sometimes I don't even know what people mean.

@newlight

Sorry for the delayed response. Get the 8372A Agnus chip. It can handle both PAL and NTSC. The Chip is socketed. It is best to get a PLCC Chip Extractor so you wont damage the socket when removing the chip (don't use a small screw driver, the older sockets are brittle and will easily crack). After that it's simply plug and play. Just remember the orientation of the old one before removing it. Usually the dot on the chip will line up with pin 1 on the motherboard.

To find your A500 revision motherboard number it will be located above the trap door located under the Floppy drive.

PLCC Chip Extractor

Drewlio77

Last edited by Drewlio77 on 13-Feb-2017 at 03:47 PM.
Last edited by Drewlio77 on 13-Feb-2017 at 03:46 PM.