jim@umcp-cs.UUCP (Jim Williams) (08/14/85)
In looking at my friend's Atari ST/520 I noticed that the Hard Disk / DMA connector is a DB-19 (i.e. just like everyone's favorite terminal connector, but with 19 pins instead of 25). I did not recall that being one of the DB sizes and checked my catalogs. I find DB-9 -15 -25 -37 and -50 (the 50 has 3 rows of pins) in every catalog, but NO DB-19. Did Atari invent it? This machine also has a few zillion-pin DIN style plugs. Are they custom or standard? It appears that Atari wanted to use a different connector for everything, so you couldn't plug something into the wrong socket and fry it. This is fine, but I hope they didn't invent connectors! Several people (not all on the net) have pointed out that the Atari ST/520 and the Amiga are open architectures, unlike the MAC, and are thus potential (hardware) hacker machines. This will be a little less true if they have non-standard (and therefore expensive) connectors. The list of ST/520 connectors sent out by pete@tekig was very useful. Is it too early to ask for a similar list of connector pin-outs for the Amiga?
jpm@BNL44.ARPA (John McNamee) (08/15/85)
The DB-19 is a custom connector. Apple was actually the first one to use it, I think on the Apple 3 (I was able to obtain a few of them from a company that used to make cables for the Apple. Sorry, I can't say who).
john@hp-pcd.UUCP (john) (08/18/85)
<<< < < In looking at my friend's Atari ST/520 I noticed that < the Hard Disk / DMA connector is a DB-19 (i.e. just like < everyone's favorite terminal connector, but with 19 pins < instead of 25). < Saw an ad for the ST that claimed that the Hard disk Port ran at a 1.33 MegaBYTE data rate. (of course they didn't say how far they could run it). It looks like they plan to avoid the complaints that Apple gets about its sub meagbit buss and slow hard discs. John Eaton !hplabs!hp-pcd!john