Search for "Dynalogic 4 Documentation" or "Dynalogic 4 Binder."
Because this machine sold in extremely low volumes (estimates suggest fewer than 5,000 units), the manual is rare. Here is the current 2025 strategy for finding it:
Cleaning: Use isopropyl alcohol and a lint-free swab on the drive head (access under front flap).
From the A> prompt, these commands are Dynalogic-specific: dynalogic 4 manual full
| Command | Function |
|---------|----------|
| DIR | Directory of current drive |
| ERA | Erase file(s) |
| SAVE | Save memory block to file |
| D4COPY | Copy disk (dual-drive only) — does not verify |
| D4FORM | Format a blank disk (takes 58 sec) |
| CONFIG | Set serial baud (300/1200/2400/9600) |
To exit CP/M and return to DynaDOS menu: EXIT
No. Dynalogic went bankrupt in 1985. No modern reprints exist. Your only options are: Search for "Dynalogic 4 Documentation" or "Dynalogic 4
Use the operator: "Dynalogic 4" AND "manual" on archive.org. As of 2025, only a fragmentary user guide exists. Upload a request to the "Community Texts" section.
Unlike single-CPU machines, the Dynalogic 4 contains two independent processors:
| Processor | Role | |-----------|------| | Z80A @ 4 MHz | I/O, disk controller, serial/parallel ports | | 6809 @ 2 MHz | User application space, graphics | From the A>
They communicate through a 1 KB dual-port RAM mailbox. To switch modes, press CTRL + F9 (Z80) or CTRL + F10 (6809). Most business software runs on the Z80 (CP/M 2.2). Graphics and real-time tasks run on the 6809 (DynaOS).
Last month, the stars aligned. A retired accountant in Vancouver listed a lot on an obscure auction site. The photo was terrible. The title was simply "Old computer books."
But in the corner of the photo, peeking out from under a stack of Lotus 1-2-3 guides, was the spine. Dynalogic 4. System User’s Guide. Volume 1 of 2.
I paid the asking price without blinking.
When the box arrived, it weighed 12 pounds. Inside were three massive binders, not two. The "full" manual set includes:
