Description

Included in the sale: Depends on selected  variant.  All variants include all necessary parts (including pre-programmed Pico module) and 3D printed case.

The Style Options:
* Assembled: Fully Assembled and Tested
* Kit: Only the surface-mount parts are installed, everything else is loose (see kit-assembly page)

The WiFi Options:
* Yes: Your DB25 BlueSCSI V2 will use a Raspberry Pi Pico-W which is WiFi and Bluetooth enabled
* No: Your DB25 BlueSCSI V2 will use a standard Raspberry Pi Pico which Does Not and Cannot Support WiFi

Fully unassembled is not offered on this model.  Manual assembly is not pleasant with 0402 parts.

Not included: SD card

BlueSCSI V2 DB25

BlueSCSI V2 is an open hardware and software fork of ZuluSCSI’s SCSI2SD implementation, targeting the Raspberry Pi Pico’s RP2040 microcontroller.  This version uses MicroSD cards.

This design is yet a little smaller than the previous DB25 Mini, no longer has “hips” (went to the gym and lost some weight).  The 1×4 header block is gone, as those were for option switches and never ended up being used.

System Compatibility

BlueSCSI is compatible with a huge variety of SCSI hosts, including: Vintage Apple Macs, Sound Samplers, SGI workstations, and many others.  Please see the GitHub Wiki for more information on specific system compatibility.

Setup

1. Find an SD card
   1. Desktop style uses a full-size SD, all others use MicroSD
2. Format your SD card as the “Fat32” or “exFAT” filesystem types
   1. They probably are formatted this way already
3. Find or create a disk image
   1. See the Usage section of the GitHub wiki for premade images or instructions on how to create your own
   2. BlueSCSI emulates hard drives and CDROM drives
4. Copy the image to the SD card and name appropriately
5. Boot

Disk Image Naming Convention

Convention For Hard Drives: HDXY_OtherText.hda

• X is the SCSI ID, Y is the SCSI LUN (most often LUN is 0)
• Example: HD10_Sys7.5.3.hda
  • This hard drive image would appear to the system as SCSI ID 1, LUN 0

Convention for CD Images: CDXY_OtherText.hda

• Same as hard drive, X is SCSI ID and Y is LUN (LUN is most often 0)
• Example: CD60_CivII.hda
  • This CD image would appear to the system as SCSI ID 6, LUN 0

LED Indicators

The green LED on the Raspberry Pi Pico module (this is the smaller green PCB) will flash a code if there is an issue.  3 flashes indicates it can see the SD card but is unable to read any contents.  5 flashes indicates it cannot see the SD card at all.  If you see a few blinks and then the LED stays off, you’re all set.  After startup, this LED serves as a disk activity indicator.

In addition, there is a white LED for power and blue LED for disk activity.  Power LED is closer to the DB25 connector and Activity is closer to the Pico module.

Troubleshooting

• Check file naming, follow the convention or BlueSCSI won’t see any disk images
• Try powering using the “berg floppy” connector, or USB
• Check the log.txt file which is written to the SD card
• Reformat or try another SD card

Kit Assembly

Assembly Instructions are available here: https://bluescsi.com/docs/Kit-Assembly-Instructions

An older DB25 version is shown there, but the idea is the same.  Put the short segment of the 20 pin headers through the blue PCB, and the long segment through the green Pico board.

Hardware Notes

• The case has one buttons marked “1”
  • Button “1” is “BOOTSEL” on the Raspberry Pi Pico and should be held when plugging into USB to update firmware
• Termination is *always on*