Welcome, Guest. Please login or register.

Author Topic: Blizzard 1230/1260 scsi interface port  (Read 2562 times)

Description:

0 Members and 1 Guest are viewing this topic.

Offline xyzzyTopic starter

  • Jr. Member
  • **
  • Join Date: May 2009
  • Posts: 74
    • Show all replies
Blizzard 1230/1260 scsi interface port
« on: December 22, 2012, 04:01:24 PM »
Has anyone considered the feasability of making a (DMA-capable) IDE / SATA interface card that plugs into the same port that the Blizzard SCSI kit does?

If space permits maybe even some embedded SDRAM?
 

Offline xyzzyTopic starter

  • Jr. Member
  • **
  • Join Date: May 2009
  • Posts: 74
    • Show all replies
Re: Blizzard 1230/1260 scsi interface port
« Reply #1 on: December 22, 2012, 09:26:37 PM »
It's a 100-pin connector. I'm examining the PCB traces and am working out where each bus goes.

So far its appears to carry A31-A0, and D31-D0... work still in progress.

Edit:

So far I have: (numbering from edge of card)

1,2 Power & GND
3-18 A31 to A16
19,20 Power & GND
21-36 A15 to A0
37,38 Power & GND
39-54 D31 to D16
55,56 Power & GND
57-72 D15 to D0
73,74 Power & GND

after this it gets a bit fuzzy, I have identified the following signals:

/DSACK0, /DSACK1, SIZE0, SIZE1, /STERM, /AS, R/W and /INT2

The rest appear to be connected to the PLDs, which I haven't traced out yet.

« Last Edit: December 23, 2012, 02:37:07 AM by xyzzy »