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Tag Archives: Z180
Some infos about my Z180 progresses
I am working on a new, old vintage Z180 based system – the BumbleBee/HC. This system is devided into a slave system and a master system. The slave system is the part I am working on first – its a … Continue reading
MiniITX-Z180 under Testing
So, base tests are running and most of the PCB is working. The only part not tested yet is the I2C subcomponent. The DualPorted RAM is working … but the SD-Card connector has the wrong connections … mirrored. So, the … Continue reading
Next PCB – a MiniITX based Z180 computer
So, the next hardware project is waiting for testing …
MC68882 as a peripheral – the overhead
I got an eMail today asking me, how much the overhead is to do all the I/O to the MC68882 and perhaps the I/O oerhead destroys all the speed enhancements. To speak with the MC68882, the Z80/Z180 has to do … Continue reading
MSKZIO – MC68882 FPU working revision
So, here is the third edition of the PCB and its working — puuh. So, here is the card running in the extension slot of the SC126 via an adapter: Here is a protocol of to communication between the Z180 … Continue reading
MSKZIO – FPU – 2nd revision, still a problem – but solution is found
So, the 2nd revision came from China and I tested it and it still did not work – that was strange, but actually I’ve found the error. I missed one signal to invert. You can see on the picture, that … Continue reading
MSKZIO – FPU partially working
I mentioned this board in https://schrievkrom.wordpress.com/2020/05/28/mskzio-fpu-for-z80-z180-playground-for-pfingsten/ and the board is partially working and I have no idea, what is going wrong. I can read the content of the FPU data registers, I can move constants from the ROM to registers, … Continue reading
MSKZIO – FPU for Z80/Z180, Playground for Pfingsten
So, the next PCBs have arrived from China – this time an attempt to connect a MC68882 FPU to my Z180 system SC126. The chip needs 32 registers for accessing and default location is (in my system) at 0xA0 .. … Continue reading
The MIVAC Board
Here is a newer video, showing the progress in software driing the ACRTC/MIVAC Board:
Documentation available for older chips (e.g. Z80, Z180, 68k)
Lots of documentation about Z80/Z180, 68K system are available under /https://feldtmann.ddns.net/rc2014/doc/
Schrievkrom 