exxos's Atari, Amiga & retro forum

Hi,

At start of New Year...

I present a piece of old hardware for the Atari Mega ST, acquired for hard money.

It is very, very rare and I don't know what real value it represents. I bought on Ebay a version built on AMD PALCE16V8 chips, and "accidentally" on the forum I came across a man from Canada - DIGITALMAN who had a version built on ST-made GAL16V8 chips. After exchanging correspondence and determining the details, we exchanged the owned copies. The whole exchange took about 5 months (because the post office screwed up again...).

So far I have reproduced the diagram. Still left to recover configuration data of 3 GAL16V8 protected chips. When I finish work on AdSCSI Plus - I will certainly work on this interface :) I do not guarantee success, but I hope to be able to reproduce one more famous interface for Atari....


diagram:
tOri

Another promising project !

Thanks tOriman !

UPDATE

Hi,

I would like to inform you that I managed to reproduce the contents of three GAL16V8 secured chips, so soon - after checking the correctness of the schematics and firmware - documentation should appear on my site.

Regards
tOri

Great !

Hi,

The project has been completed. ICD AdSCSI Micro interface has been restored and works 100% like the original :) Feel free to visit my website. The site is in Polish - so please use, for example, Google Translate.
As always, documentation is available for free.


Best regards
tOri

Awesome! :yay2:

Nice job. I got given one of these a couple of weeks ago, no limitations with disk size?

I think there is 1GB limit but I can't check it because my bigger Seagate disks don't work - Atari power supply is too weak for them :/ I don't have Quantum SCSI drive bigger than 120MB.

tOri

I will see if I can test mine with a few drives. I don't have a ACSI cable for it though so I will have to improvise one. I assume its 1-1 with the MEGAST internal ACSI port?

I have a Meanwell in mine so I can install a seperate molex plug for the HDD.

Ok. Cable is straight IDC20 but check that pin 1 on Mega ST internal pinheader is on the left (marked) and pin 1 on interface is on the right side (marked too)

tOri