My A500+ Project

[pyrre]

@ Metalguy66

I have a Derringer 030 myself. It is the 50mhz version, modified with a 50mhz fpu (was 25 originally).
I have never had those instability issues you refer to.
Mine sits quite firmly in the cpu socket.

As far as kickstart switches go. i have not come to that yet. I am still in the lookout zone for parts.
Need a new Zorro based SCSI or IDE controller. Will also try to install a network card inside the trumpcard (if i can find one small enough.)
However i have a dedicated A500 with kick 1.3 for games and demos requiring that. It is also a OCS machine whilst the 500+ is ECS...
In future i will pay some attention for the 1.3 A500 as well. But first up is the A500+.
Then i will try to setup my A1200 to work properly with the BVision board. Then the A2000 will get some attention.
So far all that is done is to remove all leaky batteries and clean the corrosion off the motherboards and ram expansions for A500...

[Metalguy66]

Yeah I havent experienced problems with my derringer either, but I am speaking from many years of owning and working on many accelerated amigas for many people. The last machine that I had this Derringer in was actually an A2000, and I never experienced any flakiness with it whatsoever. But when I set out to build this A500+, I decided to do everything I could to ensure the highest degree of stability from the start.

 I have seen many highly upgraded/accelerated AMIGA configurations that were particularly "vibration sensitive" and these have all been of the A500/A600/A1200 variety. This is due to the way that the machine is designed and the way that internal expansions have to plug into them, versus a machine such as the A2000/A3000/A4000 where almost everything is on a card, in an actual card-slot.

[amigadave]

alexh wrote:
As I said, your hard drive will be narrow SCSI (IDC50). Almost all Amiga SCSI drives ARE narrow SCSI (IDC50).



AFAIK the only Amiga SCSI with a different connector is the Cyberstorm MKIII/PPC which has an Ultra Wide SCSI (SCA 68-pin)

The A4000T 060 board (one of them anyway) has both 50pin and 68pin SCSI connections on it.

[alexh]

amigadave wrote:
The A4000T 060 board (one of them anyway) has both 50pin and 68pin SCSI connections on it.

I'd be curious to know which one. A4000T is one of the Amiga's I've never owned.

Edit: I've looked but I can't find it

http://amiga.resource.cx/exp/a4000proc
http://bboah.com/cgi-bin/showcat_en.cgi?CATID=8

Must have been a very late one. Or a prototype?

[stanlong]

I have just recieved an A590 no power supply used an old a500 power supply taped of the white left the no3 pin uc
n0 1 red n02 grnd no4 brown I think thats right (howerver what does the white do)there nis also a bare wire that i presume attaches to the shield?
does anybody know what the blinking red fred led means
and wilma  blinks then goes out fred stays on lit up  
all jumpers seem to be set up ok I presume
have run install HD software (old seagate baracuda HD)
prep hd gives bad arg :key
drive definitions gives no hd installed this is self explanitory
considering the previous
baracuda does not seem to make any noises
have checked power to it checks ok orange black yellow.
also what does this tell us about the A590
u12. 390388-03 1989 CBM V6 DFA0
u13. 8390388-03 1989 CBM V6 CBE8
also even if the HD is dead or canot be detected
the ram still appears to be (2meg fast) avail
is it usable

please forgive my ignorance

[Metalguy66]

This is A500+ with 50mhz Derringer 030/882 board installed.
The white bracket on the left is custom made to ensure that no matter what happens, the Derringer's header pins remain firmly seated into the 68000 socket. The long chip on top is a 68010, which is used in "68000 mode".

The 72-pin SIMM is a SIEMENS 60ns 32meg

You can also see that the board has 2 megs of chipram hard-soldered onto it and that the RTC battery has been replaced with a PC-style CR2032 socket.

The hardisk controller partially visible on the left is a Supra 500XP.

[darksun9210]

kick arse. thats got to be a rev 8 to have 2meg chip ram on board?

[Metalguy66]

Yes.. The board in the picture is an A500+.
A500+ motherboards are Rev 8a.

As noted before, Commodore also built very late A500 machines with Rev. 8a boards, and only populated 512k of motherboard ram, left off the RTC, and additonal chipram decoder circuits. These boards can be upgraded to A500+ specs.

[bugsthor]

as from the first few posts i have a

GVP 500 series II i might be persauded to sell for you if your still interested. works fine, i believe its origianl hdd died, but now has a 2gig in it, with 8mb im currently waiting for my 40.63 ROM so at some point after i see its working fine. i could sell it to you. with a brand new 31 workbench installed and partitioned. with lots of games and as many aps i can find. its got an on off button to at the front.

obviously the price i payed was around £80 with a heavy postage cost, so taking this into consideration and time to put the stuff on to it. any sensible offer would be an advantage, i do welcome any and all reasonable prices from this community for the guy who needs it on the first post.

i have no idea how long it will take me to complete this as yet, i`m still waiting for the 3.1 rom for the 500+ 1mb ram. not including the time to install the rest.
the box is in perfect order to, so its been well looked after. if the guy does not reply anyone else who would like to make an offer feel free.
http://i20.photobucket.com/albums/b205/DARTH-THOR/DSC00216.jpg

http://i20.photobucket.com/albums/b205/DARTH-THOR/DSC00217.jpg

[alexh]

That's a different box to mine!