Entrants List 2018/04

Listed below are the competitors joining us for the 2018/04 event:

Halftime comments in blue...

Final comments in red...

Rebuttal comments in orange... 

Mark D. Overholser (aka MarkO)



To make this a project that actually can be completed in time, I am "attempting" a Multi-Player, Networked Text Adventure, with a Server running on a modern PC, and the Clients being the Apple ][, ( with the Uthernet II Card ) and the Tandy CoCo, ( with a Serial Port and a Lantronix UDS-10/100/1000 or ESP8266/ESP32 WiFi Module ).

I still have not given up on the Idea of Networked CoCos and Apples and C64/C128s and such.

In the previous year, there has been made available an RS-232 to WiFi Module from the Commodore Community from CBMSTUFF, which is Jim Drew, an established hardware provider.

The possibility of reaching this goal has increased dramatically because of Networking Improvements made in the last three months, specifically for the Tandy Color Computer ( CoCo ).

Allen Huffman has a simple, direct WiFi solution that uses the RS-232 Pak, of which are not as common as the CoCo with it's Built In, Bit-Banger Port, and Jim Brain of Retro Innovations is developing a new RS-232 Pak replacement so the viability of this Hardware is a certainty.

Matteo Trevisan (aka Toolkitman)



In This Retrochallenge i want to take part to the Radio Shack Community by makeing a new way to login and use the Coco Basic Operating System. It's not an easy task also because i'm veteran of a 50 miles run and i'm a little tired : ).

I will make my best explaining it to the community.

Kevin Becker



I have two TRS-80 PC-3 pocket computers that aren't working 100%. I'd like to see if I can get them fully functional again.  I also have two cassette/printer interfaces for them that have dead nicad batteries.  I haven't found any info online about replacing these batteries, and there may also be corrosion damage so I will also be attempting to revive these as well.  Finally I have a fully working PC-4 but no cassette interface for it.  I'm going to try to either build working cassette interface or, preferably, build a solution that allows transferring files directly to and from a Raspberry Pi.

Mark Sherman



This time I'll be build a new replacement joystick for the Atari 5200.  The original design is horrible, new-in-box ones are often DOA, and the few third party alternatives are expensive items.

What is thing thing supposed to be, a telephone?




My objectives, by priority:
  1. Organize my office full of old computers and identify stuff to eliminate. 
  2. Repair some damaged Apple II+ parts.
  3. Get ElWhip <http://apple-crapple.blogspot.com/p/blog-page_19.html> source code uploaded to GitHub <https://github.com/>.
  4. Test out an ESP32 <https://www.espressif.com/en/products/hardware/esp32/overview> (new version of ESP8266) as an internet modem / PPP server for old Macintoshes.
  5. Test out an ESP32 as virtual serial port for Apple II.
  6. Add SmartPort compatibility into a2usbdsk.


(Twitter free)


A brief synopsis of your project: Finish the last three items on my website designed for vintage computers, http://www.nocss.ml/, which includes an internal messaging system, a website proxy (with https support), and a google search. Also finish testing all the aspects of the site on my Macintosh Classic.

Jim Gerrie

(Twitter free)


Don’t know how much I can accomplish this round.  Very busy at work.  But I’d like to use the RetroChallenge 2018 to motivate myself to complete blog posts on my latest projects:
  • 10 Liner Programming contest entries
  • FOD port
  • Meteor Storm
And possibly I’ll come up with some original game or a new port for the contest if things work out.  Oh and I’m cleaning up my Zip with the VMC10 emulator (latest version) with all the programs and docs of the elite programmers in subdirectories of their own off the main Cassette directory.

Michai Ramakers



Making a working firmware for my "Bait-a-Cart 64" Commodore 64 cartridge-adapter.

This is a physical adapter-board with flash and a microcontroller, sitting in between the C64's cartridge-port and an existing cartridge. (The Bait-a-Cart is plugged into the C64, and an existing ROM-cartridge is plugged into the Bait-a-Cart.)

The idea is to have the Bait-a-Cart contain a program that displays a logo, intro or text. When the C64 is powered on, this intermediate program is shown until the user presses space, which will start the actual program on the existing cartridge. It's very much like adding an crack-intro to a game, except done in hardware.

The goal is to easily customise a retrocomputer-setup with a club-specific logo, intro or similar, for events or retro-spaces.

At the moment, the Bait-a-Cart hardware exists, but firmware does not. RC2018/04 effort will go into testing the hardware with an actual C64 and ROM-cartridge, and making Bait-a-Cart firmware (running on the Bait-a-Cart microcontroller) as well as finishing a C64 intro to be displayed before the ROM-cartridge is started.

That's the list...at least, for now! Anyone else? :-)

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