#tcbm — Public Fediverse posts

Now I have finalized the TCBM2SD firmware. I managed to squeeze in read-only support for disk images (D64/D71/D81).

This pretty much completes what I wanted to achieve. The next step could be a cycle-exact 1551 emulator (Pi1551 base on Pi1541, but that's a completely different project).

The author of Directory Browser kindly shared the source code with me, so there is now a version that supports the native fastload protocol (23x, ~9KB/s) for files and directory listings. The browser can be easily loaded using the SHIFT+RUN/STOP combination.

Everything about the project is open-source and published at https://github.com/ytmytm/plus4-tcbm2sd

But if you own a Commodore C16/C116/Plus4 and you'd like to buy a ready-made TCBM2SD from me, please send me a message. Let me know how many you'd like and include your country of residence. I'll be ordering PCBs soon, so I’d like to estimate how many will be needed. Once I have that information, I’ll get back to you with a price offer.

#1551 #tcbm #sd2iec #commodore #plus4 #cbm

I made tcbm2sd!

It's like Tapecart or SD2IEC but instead of IEC bus it uses native TCBM connection to C16/116/Plus4, simulating 1551 drive.

https://github.com/ytmytm/plus4-tcbm2sd

Normal people would try to find a sd2iec and JiffyDOS for Plus4. I had no patience for that, so I spent last month developing this project.

It's my first project with CPLD and it worked on the first try.

The first revision uses Arduino Mini Pro with ATmega with 32K flash. It's not enough for full sd2iec port to service disk images, but works very well for file-based programs.

It's fast! The embedded file browser (available always when you load '*' file) has a special fastloader feature, over 23 times faster than stock 1541, on par with DolphinDOS.

See for yourself: https://www.youtube.com/watch?v=Cf42Z9H2JiA

#1551 #tcbm #sd2iec #commodore #plus4 #cbm