Here we have a postmodern clone of the Promenade C1.

The Promenade C1 was a popular EPROM programming solution for the Commodore line of personal computers that was produced and sold by the Jason-Ranheim Co. out of San Jose, California. These have become rather expensive to obtain as of late and a fellow by by the name of ljmarent has taken it upon himself to produce and release a clone that anyone can build. It is our understanding that the design, software and documentation are considered to be public domain at this point.

I've found this programmer to be a useful and fun to use tool in my retro computing endeavors, though I admit using more modern tools would likely be more convienient.

Project Links

• Tinkercad - ljmarent Promenade C1 Clone 2.0 EPROM Programmer Rev 1.3

Related Links

• mikenaberezney.com Some information and photos of the original Promenade C1
• github.com/svenpetersen1965 Sven Petersen and C64OS/Greg's Promenade clone dubbed the Model D.
• cottonwoodbbs.dyndns.org A clone called the Megabit C1 that you may be able to buy pre-made.
• Archive.org - melon64.com Forum post with software, manual and an updated schematic. (Forum disappeared.)

Provided here

• Gerbers for PCB manufacturing.
• BOM Sheet parts list in CSV format. (Updated 2022-02-19, R1,R2 was incorrect on schematic/bom. Should be 3ohm.)
• Schematic for Promenade C1 Clone 2R
• Operating Instructions for the programmer.
• Operating Instructions older verison.
• PromosV2.zip
• promos_manual.zip
• Promenade C1 redone schematics.zip manual with updated schematics by Dan Newbury (Megabit C1)
• promenade.d64
• promshell.d64

Notes

I believe PromosV2.zip is the latest version for C64/128. I'm using the 'promenade.d64' which ... may or may not be the same thing.

The diodes tend to run hot, so Les had suggested that it's probably a good idea to leave a little bit of air gap between them and the pcb.

Auditory Pairing