Using the [BlueSCSI](https://github.com/erichelgeson/BlueSCSI) SCSI drive emulator and your compatible SCSI card, you have a fully internal hard drive with accessible microSD slot while still keeping your DB-25 connector free for other peripherals.
[![Close-up of BlueGS installed in IIgs slot](images/bluegs_v1.2_rear_installed_cropped_thumb.jpg)](images/bluegs_v1.2_rear_installed_cropped.jpg)
[![BlueGS installed in IIgs slot, right side](images/bluegs_v1.2_rear_installed_right_thumb.jpg)](images/bluegs_v1.2_rear_installed_right.jpg)
[![BlueGS installed in IIgs slot, left side](images/bluegs_v1.2_rear_installed_left_thumb.jpg)](images/bluegs_v1.2_rear_installed_left.jpg)
# How it works
BlueGS connects between your SCSI card and its external DB-25 connector to give you a seamless installation. The BlueGS module itself mounts in a free DB-25 connector cutout in the rear of your IIgs or Enhanced //e.
[![Overhead view of BlueGS in IIgs slot](images/bluegs_v1.2_installed_overhead_thumb.jpg)](images/bluegs_v1.2_installed_overhead.jpg)
[![Frontal view of BlueGS in IIgs slot](images/bluegs_v1.2_installed_front_thumb.jpg)](images/bluegs_v1.2_installed_front.jpg)
# Features
* Gives your Apple IIgs or //e an internal, cable-free hard drive
* Can be powered from SCSI termination power only (if present)
## How do I know if my card provides "termination power"? What if it doesn't?
Running BlueGS from "termination power" makes installation much easier, but not all SCSI cards have it. For more details, please check out the notes on [Powering BlueGS](POWERING_BLUE-GS.md).
Using [BenchmarkD](https://www.brutaldeluxe.fr/products/apple2gs/benchmarked.html) with Apple IIgs (ROM 1, "Fast" speed), GS-RAM Plus w/ 2MB, GGLabs A2SCSI card. Using Blue-Pill-based BlueGS board.
This project would not be possible without the work done by [ztto](https://github.com/ztto/ArdSCSino-stm32), [Tambo](https://twitter.com/h_koma2), [Eric Helgeson](https://github.com/erichelgeson/BlueSCSI), [Androda](https://androda.work/), and many others.