Bally Alley Astrocast

This podcast covers the Bally Arcade videogame console released in 1978. This system was also called the Astrocade and the Bally Professional Arcade.
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May 29, 2020

In episode #16 of the Bally Alley Astrocast, Kevin Bunch interviews Andy Guevara. The interview took place Saturday, May 16, 2020. Andy wrote three programs that were released on cartridge for the Bally Arcade/Astrocade. The first cartridge was Machine Language Manager (MLM), released by The Bit Fiddlers in 1982. L&M Software approached Andy due to his machine language skills and a collaboration got underway that produced Ms. Candyman and Sea Devil, which were both released on cartridge in 1983. Andy also wrote some additional software: Chicken and the Goldfish Demo were released on tape, while a few others were released as type-in programs. Mr. Guevara's used an Apple II Plus with a Z80 card which ran the CP/M operating system to write most of his software for the Bally Arcade/Astrocade.

Recurring Links 

Machine Language Manager (MLM)

  • Machine Language Manager (MLM) is a 2KB cartridge written by Andy Guevara in 1981 for the Bally Arcade/Astrocade. It was released by The Bit Fiddlers in late 1981/early 1982.
  • There is a series of four videos about the MLM. The episodes are called, "Part 1: Overview and Background," "Part 2: How to Use the MLM," "Part 3: Using MLM Example Programs," and "Part 4: Using MLM with the Astrocade MAME Emulation."

  • Machine Language Manager User's Manual - This manual explains how to program in machine language using the "MLM" cartridge. There is also plenty of information that explains how to program the Bally Arcade/Astrocade in general. The complete source code listing for the cartridge is included.
  • Machine Language Manager Programs - Digitally archived Bally Arcade/Astrocade programs that will load with the Machine Language Manager cartridge and the 300-BAUD tape interface.
  • Machine Language Manager - Source Code - This is the Z80 assembly source code the for MLM cartridge in ready to assemble format.

Sea Devil

  • Sea Devil is a 4K third party game. It was released in 1983 by L&M Software. This cartridge was written by Andy Guevara (of The Bit Fiddlers). You are the guardian of a 21st century undersea farm. Not only is this important to the survival of the people on earth, but the company you work for have risked millions on this venture. Zardos, the evil king of a distant planet, needs this food for himself. He has sent android divers with other sea creatures to steal this food. You must destroy the hoard of poachers as quickly as possible because each bit of food (the white abalone on the bottom) they get will cost you bonus score at the end of the screen. Beware, the poachers are releasing undersea mines to destroy you, avoid them by evasive action.

Ms. Candyman

  • Ms. Candyman is a 4K cartridge released by L&M Software in 1983. It was programmed by Andy Guevara. Ms. Candyman is the sequel to 1983's Candy Man, which was released on tape. This is the description of the game from an advertisement: "Real arcade action with joysticks, 1 or 2 players and 3 levels of difficulty. More than 20 screens, each faster than the one before. Full screen display in exquisite detail. Ms. Candyman must pick up all of the lifesavers as quickly as possible while avoiding contact with the Ghosts & Goblins. During the first half of a screen the Ghosts or Goblins will try to catch you. During the 2nd half of a screen the Ghosts or Goblins will take up protective positions to keep you away from the life savers. Each contact costs Ms. Candyman one life and she will nose-dive head first off the bottom of the play field. A wrecker or ambulance will carry her off."

  • Candy Man is the prequel to Ms. Candyman by L&M Software. It was released on tape. It loads via the Astrovision release of Bally BASIC (usually called "AstroBASIC"). The game was written by Bill Loos and Greg Miller, who make up L&M Software. It's unclear to me how much of this game is written in BASIC, but by the speed of this game, my guess is that it relies heavily on machine language subroutines built into the Bally's 8K on-board system ROM. Andy didn't directly work on Candy Man, but the programmers of the game might have used his machine language routines in the game.

  • Ms. Candyman Ad - L&M Software's very rare cartridge release for the Astrocade. This game is one of those rare occasions where the rarity of the game does not speak about the quality of gameplay. A great game.
  • Ms. Candyman Review - Michael Prosise reviewed Ms. Candyman in his "The Game Player #13" column in the November 29, 1983 of the Arcadian newsletter.
  • Ms. Candyman Disassembly - This is a partially commented Z80 disassembly of Ms. Candyman. All of the games graphics were found and most of the code was disassembled, but not commented. Hopefully Andy can provide the printed source code listing so that this game can be completely commented.
  • Ms. Candyman High Score Club - Ms. Candyman was played for the Astrocade High Score Club in June 2017 for HSC02, Round 6: Ms. Candyman / The Mummy's Treasure.


  • Chicken! - The Bit Fiddlers, 1982. It's late... you've got to get your brood home in time to watch "Fowl Play." The only problem... there's six lanes of freeway between you and home. And every day it seems to get worse... CHICKEN! is a one or two player game of skill. It pits each player against six lanes of highway of ever increasing traffic density. The object, of course, is to get your chickens across the road.

  • Chicken source code - This is Richard Degler's disassembly of the Bit Fiddler's "Chicken (The Bit Fiddlers).bin." This game originally loaded via Bally BASIC, AstroBASIC or the "Machine Language Manager." This version of the binary will run as a cartridge.

Goldfish Demo

  • Goldfish Demo - Seven goldfish (actually they are neon tetras) swim around a fishtank, a clock runs, and a cat meows every minute.

  • Goldfish Source Code - In January 2008, Lance F. Squire converted the Goldfish Demo to run as a cartridge.

Standard Color Generator

  • Standard Color Generator - By Andy Guevara/The Bit Fiddlers. BASIC EXPRESS, THE 3, no. 2 (May/June 1981): 15-16. "Machine Language Manager" Manual (Page 7-4) This video test software generates 8 standard colors used in TV work. It is for use with the Bally Arcade/Astrocade and Bally BASIC or the Machine Language Manager. The "Standard Color Generator" program will display a series of color bars which can be used to set the colors on your TV set. The color bars are displayed from left to right in the following order: Black, White, Yellow, Green, Blue, Magenta, Red and Cyan. This video is broken into several part: Overview of Program, Program Loading and Running (Direct Capture), and Program Loading and Running (Video of TV). This program is useful to help adjust colors on a TV. It's also an excellent example of showing more than the usual two colors on the screen at once from BASIC.

The Bit Fiddler's Corner

  • Andy Guevara programmed the "Machine Language Manager" ("MLM") cartridge for the Astrocade as well as writing "The Bit Fiddler's Corner" tutorials to help support the program. The tutorials complement "MLM," but they also have a general focus, so this information can be used without reinterpretation by Bally Arcade/Astrocade assembly language programmers, or those wishing to learn about the machine.
  • The Bit Fiddler's Corner - Links to each article in the series as they appeared in the Arcadian.
  • The Bit Fiddler's Corner - These tutorials were converted to text by Adam Trionfo on January 13, 2002. This is the complete series in one Rich Text Format document.

Andy Guevara - Miscellaneous Links

  • Atari Archive - Kevin Bunch is "chronicling the early history of video games with mini-documentaries focused on a particular game or topic.
  • Z-80 SoftCard - Bit Fiddler's programs were created using this Z-80 card, or one similar to it, for the Apple II Plus.
  • "Astrocade Owners!" Advertisement - This half-page ad appeared in the January 1983 issue of Electronic Games. "Here's a list of professionals who support your computer with programs, hardware and information to help you enjoy your Astrocade to the maximum!" Each of the 17 companies listed in the ad has contact information, along with a brief summary of what they do. Running this ad was very expensive. Richard Houser, from Astrocade Sourcebook (one of the companies in the ad), has said that everyone in this ad grouped together funds to run it for several issues in Electronic Games magazine. When asked if the ad worked at all, Richard said that it did have noticeable results. A higher-quality version of the just the ad can be read here.


There is no feedback covered in this episode,but we would love to hear your thoughts and comments about this (or any) Astrocast episode or about your history with the Bally Arcade/Astrocade. The best way to contact us is via email at BallyAlley or through via the Bally Alley Discussion Group at

Next Episode's Coverage

Astrocast #16 was supposed to be the first of a sporadic multi-part series that covers some of the material in the "AstroBASIC" manual. That episode was bumped to make room for the interview with Andy Guevara. The "AstroBASIC" manual overview will be in Astrocast #17.


May 8, 2020

In episode #15 of the Bally Alley Astrocast, Adam conducts a user interview with David Kindred. David got his Astrocade console in 1981 when he was eleven years old. He learned to program in Bally BASIC, which caused a spark that eventually ignited into a flame that drove David to college where he studied computer science and information technology. He worked for 25 years as a computer programmer, beginning with Fortune 500 companies, before he moved into IT management, where he works to this day.

In this podcast, David explains how using the Bally/Astrocade helped to shape his early views on programming and how the system and its BASIC programming language allowed him to be precise in his thinking. Lastly, lets not forget the fun tale of the subtle drawing of a tree with toilet paper hanging from its limbs that he created with a friend using the Astrocade's built-in program, Scribbling. Why would he draw this small wonder of art? This humble drawing glorified the cute misconduct of two thirteen year old boys who had spent the previous evening TP-ing a neighbor's tree.

If you have ever wondered what it felt like to be the owner and user of a minority game system like the Astrocade, then David can help fill in some of the blanks that are so hard to come by when talking to people who grew up with the more mainstream game systems like the Atari 2600 or much more popular computers like the Apple II.

Recurring Links 

  • Dick Ainsworth Webpage - Dick's manuals and how-to-program books introduced several of the early personal computer systems, including the first Microsoft BASIC with Bill Gates and Paul Allen, and Bally BASIC for the Bally computer. The Computer Learning Lab was an interactive book/software combination for the Sinclair Z-80 and the Radio Shack Color Computer that included software programs on audio tape cassettes. I also developed a wide variety of software from personal productivity and time management systems to game simulations.
  • Ainsworth Computer Seminar - Curious about computers? This hands-on seminar (from 1996-2004) is the ideal place to begin. You can view the text portion of the seminar by following the links on the website. If you would like to also view the program examples and details in addition to the text, get the free download that includes both text and programs. [Some of the links on this page are broken; maybe they'll be fixed someday?]
  • Sourcebook Bally/Astrocade Catalogs - The ARCADE unit with the BALLY BASIC Cartridge inserted becomes a versatile home computer. If you are interested in what equipment and programs are available to expand your ARCADE - then buy the BALLY / ASTRO SOURCEBOOK. The BALLY/ASTRO Professional ARCADE Software and Hardware SOURCEBOOK will acquaint you with the programs and accessories that are available for you to use with your new ARCADE computer. The SOURCEBOOK is a compilation of Software and Hardware Products produced for the BALLY/ASTRO Professional ARCADE. The SOURCEBOOK contains 100+ pages, with more than 400 Software and Hardware Listings. Two editions of the SOURCEBOOK are published each year. Orders received between March and August will receive the SUMMER Edition. Orders received between September and February will receive the WINTER Edition. The SOURCEBOOK is published by RMH Enterprises and has no official connection with the ARCADE manufacturer- ASTROVISION Inc.


There is no feedback covered in this episode,but we would love to hear your thoughts and comments about this (or any) Astrocast episode or about your history with the Bally Arcade/Astrocade. The best way to contact us is via email at BallyAlley or through via the Bally Alley Discussion Group at

Next Episode's Coverage

Astrocast #16 will be the first of a sporadic multi-part series that covers some of the material in the "AstroBASIC" manual.