Here is Enhanced Basic together with SBCOS modified to run on the stock MECB 6850 ACIA, it is quite an easy port and I found it able to run in RAM or ROM. The basic is quite complete and has full source available. The monitor isn't half bad either having both assembler and disassembler built in. 65C...

Apparently the creativision basic uses the VDP RAM to store programs, this is partly responsible for its slow operating speed. I found an interesting discussion here: https://forums.atariage.com/topic/219596-how-powerful-was-the-creativision/ Also because of this, graphic programming is not possible...

I've forgotten most of the little I learned about mame singe starting with the real MECB, I'm happier with the command line approach. I hadn't realised there was a -cart parameter to load the roms either, I can now play the basic rom using a variation of your sample command, nice. Typing in mame is ...

Swapping the two parts as suggested by Emil has resulted in Basic-1983 booting. I shall now try and patch the bios to read keys from the UART. Cant wait to get Greg's Creativision keyboard but that will have to wait a bit. https://signpost.djrm.net/images/data/Creativision-Basic-1983.png It didn't w...

Ah well that's back to front compared to how I was trying it, I'll test again in the morning. Thanks for your help. I couldn't get creativision working in mame. Not sure where to put the roms, bios seems to have been found though, strange. David.

Greetings Paul, 6809, 6502, what more could you want. I'm finding the MECB much more satisfying that the other Z80 based retro system I also have. But I'm about to make a bridging adaptor so I can use cards from it on the MECB. I too started my MECB journey after trying to get my old homebrew system...

Extra supplies of 16v8s arrived this week, i've used them to add creativision mimic versions of the PLDs, this has allowed me to run the sonic invaders rom from the 1M expansion board. so far, so good. The plan is to be able to run the basic rom but I have a couple of problems, 1) the rom is 12k but...

Here I have made a sector dump from a USB stick attached to a ch376. the code is adapted from the Alan Cox Fuzix driver. It is compiled with the 6809 CMOC and loaded into ram to run. The bus interface uses no other components besides the 16v8 address decoder on a prototype board. >L >C 1000 ch375 te...

It took longer than expected to get the Micro11 monitor working, there were multiple problems competing with my competence. Simplifying the 16v8 decoding was the solution to the main problem but it was exasperated by a dodgy 28c256 chip. The chip had lost its memory during my testing and is now part...

What I thought should be a simple build to get the 68HC11 working with external rom and ram is causing me problems. Fortunately the bootloader is working and I can see what the symptoms of the trouble, reading from the bus is unreliable, writing could be having difficulty too for all I know. probing...