Folks,

The Brewing Academy is happy to remind you that we are selling the remainder of the ElectroTrains' UNOCart Atari cartridges that we assembled.  (Okay, it’s just me here, but “we” sounds so much more cooler!).  Unlike the Ultimate Cartridge, these will NOT work in a 400/800.  XL/XE ONLY.

The case was modified and printed by me. NOW AVAILABLE IN MULTIPLE COLORS!!

TO BE CLEAR:  This auction includes an assembled and tested UNOCartridge inside of a custom made case with the label you see printed.  You have to provide your OWN microSD card (most of them work without a problem).  You will have to download your own ROMs (see AtariMania for a good start!).

IF you want your UNOCart Atari cart to come in a color OTHER than black, please see this auction:  

Item # 282582675937 (Sorry eBay says no links)

CAR Files & ROM Files

CAR files and ROM files both contain the data for a cartridge. However CAR files have an additional 16 bytes header containing the cartridge type making it clearly identifiable to the UnoCart. In contrast, the cartridge type of a ROM file is ambiguous – e.g. an 8k ROM file could be a standard 8K cartridge, or an 8k OSS cartridge.

ROM Files

Plain ROM files are supported, but since these files are raw cartridge dumps, the UnoCart will decide what type of cartridge they come from based on the file size only. The table below shows what types will be used.

Supported Cartridge Types (CAR files)

Converting to CAR format

Utilities are available to convert ROM/BIN files into the CAR file format. The ROM2CAR utility available on the Ultimate cart website provides an easy drag and drop interface: eBay, no links.  Search for GitHub, Atari Ultimate

Problem Files

You may come across files with a .BIN extension. These are often just .ROM files and can be renamed. You may also find ROM files where the UnoCart menu gives the error “Unsupported ROM size”. This happens when the ROM file is not an exact multiple of 1,024 bytes. In this case, the ROM dump may have already been converted to a CAR file (with a 16 byte header) but has been wrongly named and you can simply rename the file from .ROM to .CAR.

ATR Files (64k and above XL/XE only)

The cartridge also has simple support for reading and writing to ATR (floppy disk image) files. It supports both SD (128 byte sector) and DD (256 byte sector) images. DD images must be standard ATR files, with 128 bytes for the first 3 sectors and no padding. The device supports ATR files up to 16 megabytes in size.

When an ATR file is selected from the menu, a modified version of the Atari operating system (OS), based on the Altirra open-source LLE kernel, is installed as a “soft” OS in the 16k RAM under the OS – this allows the Atari’s SIO requests to disk drive 1 (D1:) to be re-directed to the SD card in the cartridge. 

The main use case for this feature is to allow you to boot a DOS formatted disk (e.g. DOS 2.5) and load and save BASIC programs to the disk. Note that the UnoCart cannot emulate a disk and cartridge at the same time.

In ATR mode, the LEDs on the cartridge indicate SIO reads (green) and writes (red) to the ATR file. Accesses to other disk drives (D2: upwards) are passed through to the SIO port as normal. This allows files to be copied between an ATR mounted on the cartridge (D1:) and other SIO devices (D2:+).

Hold down OPTION when you select the ATR file to disable BASIC. This is necessary for many games. MyPicoDOS ATRs (such as the 16 meg game compilations) will run, but SELECT should be pressed to disable high-speed SIO, and use the operating system SIO routines instead.

Important note – many ATRs will run correctly from the UnoCart. However, any programs that attempt to use the RAM under OS will not work, nor will any software that does not use the standard OS SIO calls.

The OS ROM is stored in the cartridge firmware, but an alternative UNO_OS.ROM file (16k) will be loaded and installed from the root directory of the SD card instead (if such a file is present).

 NOTA BENE:  Some users with internal modifications (such as the Ultimate 1MB) have reported some incompatibilities with the UNOCart. YMMV. No returns for this issue.  Thanks

microSD Card/ROMs NOT INCLUDED.  

 Shipping includes insurance.

Any questions, feel free to ask. 

SUPPORT & QUESTIONS:

Support will be handled at The BATES MOTEL BBS (Telnet to 76.14.174.25:8888) or The Brewing Academy Website.

The Bates Motel BBS is for Atari, TI 99/4a, and all other computers!  Come check into the Motel.  Stay for the showers!

RETURNS:

You may return it for up to 30 days for a REPLACEMENT only.  Buyer pays *ALL* shipping.  All returns may be subject to a 20% restocking fee.

Other items:

I also have other hardware additions to the Atari 800/XL/XE that I will build for you:  

SpartaDOS R-Time8 Replacement cartridges (for sale in other auctions)

Transkey-II PS/2 keyboard adaptors (for XL/XE & XEGS). 

Atari Jaguar Reproduction Cartridges

I can also do hardware modifications/installs for you!  

Contact me for details and prices.