APPLE CRAPPLE

Well, I had hoped to do some work on an Apple II project, but my theme category for RC2021/10 "The Millennials" isn't getting ...

In my previous post on the MIKUL 6218 board, I mentioned that was using the lower 32K of address space on the CMS 9619 to swap in 16 banks o...

With the virtual address jumper for the MIKUL 6218 sorted , I still needed to simplify the address decoding and memory chip selects so that ...

A18 Addition I really want to use my two 512KiB SRAM chips on this board to maximize the usable RAM. Fortunately, the MIKUL 6218 has 32 pin...

I was recently able to trade one of my extra CMS 9619 SBCs for a CMS 9600A MPU (Thanks Joel!). This EXORbus processor card has very sim...

I haven't spent much time working on my CMS 9639 SBC because, unlike the CMS 9619 , it does not have any usable on-board RAM and does n...

One of the shortcomings of this CMS 9619 system is the fairly complicated OS9 bootstrap procedure I had to use in the absence of any sort of...

After finding out that my CMS 9619 Advanced Single Board MicroComputer was having problems accessing the EXORbus , I tried some trouble shoo...

Update : Since this post I have figured out how to change the address map using a GAL IC. I recently posted some minor hardware modificati...

I finally got drivewire running on the CMS 9619 SBC. As a result, I managed to complete the bootup and have a virtual disk! Source code a...

The EXORbus MULTI-PLANE backplane is now available on my Tindie Store !

After getting OS9 to boot to the shell on my CMS 9619 SBC, I was hopeful to get the DriveWire module working to load in disk images in a mor...

Excited to see these EXORbus backplane cards arrive:

I just put in my first order for PCB fabrication today. After making some final modifications my ATX Powered EXORbus Backplane "MULTI-P...

I finally got it working thanks to the advice of a kind member of the Tandy Color Computer (CoCo) discord channel . Interrupts! Once I conne...

While I was waiting for my RAM to arrived, I tried burning an EEPROM for NitrOS-9 so that I could make the load time shorter and avoid the r...

This post is just to document and explore some of the interrupt options on the CMS 9619 that could be compatible with NitrOS-9's interru...

I spent some time today trying to get NitrOS-9 booting on the CMS 9619 SBC. I was able to get this working in emulation , so I was hopeful ...

Note the 5 28 pin sockets on the right side of the board for 4K or 8K SRAM or ROMs In order to get NitrOS-9 running on my CMS 9619 SBC ,...

I'm starting a bit late, but since I am in quarantine and working on some old computer stuff anyway, why not enter?! Here are my goals f...