https://github.com/ifilot/slot-otter

8-bit ISA card to interface with a FAT32 formatted SD card
https://github.com/ifilot/slot-otter

Last synced: 5 months ago
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8-bit ISA card to interface with a FAT32 formatted SD card

• Host: GitHub
• URL: https://github.com/ifilot/slot-otter
• Owner: ifilot
• Created: 2025-10-19T12:32:32.000Z (9 months ago)
• Default Branch: master
• Last Pushed: 2025-11-03T21:14:04.000Z (8 months ago)
• Last Synced: 2025-11-03T23:19:19.006Z (8 months ago)
• Language: Assembly
• Size: 6.69 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# Slot-otter

[![Build and Release](https://github.com/ifilot/slot-otter/actions/workflows/build.yml/badge.svg)](https://github.com/ifilot/slot-otter/actions/workflows/build.yml)

A 8-bit ISA card to interface with a FAT32 formatted SD card in MSDOS.

![slot otter isa card rendered](img/slot-otter-isa-card-rendered.png)

## Software

The main software component of this project is `OTTERNAV.EXE`, a DOS utility

used to navigate the FAT32-formatted SD card and copy files between the SD card

and the system’s hard drive. The program is compiled from source using Borland's

Turbo Assembler v2.0.1 and Turbo C v2.0, classic MS-DOS development tools

originally distributed by Borland Software Corporation. The binaries for these

tools were obtained from [WinWorldPC](https://winworldpc.com/home).

## Downloads

Get the latest pre-built files:

- [OTTERNAV.EXE](https://github.com/ifilot/slot-otter/releases/latest/download/OTTERNAV.EXE)

- [floppy_360k.img](https://github.com/ifilot/slot-otter/releases/latest/download/floppy_360k.img)

- [floppy_720k.img](https://github.com/ifilot/slot-otter/releases/latest/download/floppy_720k.img)

- [floppy_1440k.img](https://github.com/ifilot/slot-otter/releases/latest/download/floppy_1440k.img)

> You can also browse all releases on the [Releases page](https://github.com/ifilot/slot-otter/releases).

These images can be written directly to physical floppy disks or used with

floppy drive emulators such as GoTek,

[BitstreamBeaver](https://github.com/ifilot/bitstream-beaver) or FlashFloppy for

easy installation on vintage systems.