Zyklus-MPS

The original system had a dedicated MIDI breakout box, connected using an EDAC connector. There was another box for the audio connections. It was hard to find, but I managed to find a picture showing the original box: It uses the same midi and jack connectors as the Zyklus MPS. So I set out to […]

Not a whole lot to update lately. Just a few things: The PCB Paul created for the memory card came in. It’s again a work of art….   I’m going to arrange for a company to map out the old memory card connections towards the IDC. The pins are too thin to measure by hand, […]

Although some details still remain to be done or finished, Direct is now fully running and usable. There were a few issues trying to get it to this point: There was a short on the newly soldered joints for the replacement button panel, which caused Track and Thru switch 4 and 5 to trigger simultaneously. […]

I’ll elaborate more soon on what the hiccups were, but here she is, running Version 1.7, which is actually 1.5 but slightly modified by me. I can’t connect it yet to any keyboards as I’m still working on making the breakout box, but here she is, alive and kicking!    

When I first got the original code, I set out to find the correct compilers and linker, as I did for Zyklus as well. Looking at the batch scripts used for compiling as well as some map files that remained, it was quickly discovered that the used tool chain was by Microtec.  Through the ‘internet […]

A lot has been happening. Since the hardware restoration was pretty much done, it was time to start focusing on getting the OS to work. There were quite a few hurdles to take. These were the options so far: Use the MCL68+ CPU emulator.  This wouldn’t work out of the box, for the simple reason […]

Have a few days off for the holidays which allows me to get some of the more tedious work done. I mapped out the complete MIDI EDAC connector to the main board. It includes signals for an RS232 port and two foot switches. I also rebuild the Metronome level pot. It was jerry-rigged with a […]

Here’s some imagery of where it is at now. Focus for the next few weeks will be on refurbishing the audio section, creating the MIDI breakout box, which includes tracing all the midi connections to the mainboard and further and mapping these out in the EDAC connector. And finally, we’re mapping out the IDC40 connector […]

This took a lot of tinkering and quite a bit of frustration too, but I’ve finally got Direct working with new EPROMS that I wrote myself. Going through a lot of issues with various assemblers (being on a Mac) and not knowing all the details obviously of coding ASM for Motorola which is still quite […]

Where you just can’t stop tinkering. The machine started somewhat and I did a quick check to see that the HALT line and RESET line were both ok, indicating that the CPU is in working mode. I was googleing on various 68000 related diagnostics issues when a single post caught my eye that talked about […]