Mastodawn

Time for a #commodore16 run.
I need a power connector new on pcb because is a bit "forced enlarged" and sometime power goes down, but i can't find anything for replace, suggestions?
#c16 #retrocomputing

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Peter Krefting Feb 15

The #Commodore16 does work with my SD2IEC when I power it from its tape port (via adapter).

For the #CommodorePlus4 I was told that cassette not working was due to a bad CPU, so I got me a replacement and now that works.

https://www.freepascal.org/~daniel/8501/

Now to get a proper PSU. Or just an adapter cable for the aftermarket C64 PSU I got.

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Peter Krefting Feb 5

@hkz Nice! I did get PCBWay to build me the Fixteen, and when one of them didn't work (the danger of working with second-hand parts), the original author pointed me towards this expansion instead:

https://plus4world.powweb.com/hardware/Hannes512

Apparently there is some software that can do fun things with the extra memory banks. (There is also a 256K version)

#Commodore #Commodore16

Hannes512 - Hardware - Plus/4 World

hkz Feb 4

Released the #SIXTEEROIDS RAM expansion/replacement for the #Commodore16.

It's an interposer that sits between the TED and the mainboard, disables the DRAM and controls two SRAMs. In this mode, the original DRAM can be optionally removed. A jumper can be used to disable the module and enable the DRAM.

https://codeberg.org/hkzlab/SIXTEEROIDS_C16_SRAM_Expansion

It's mostly through-hole, except for two optional TVS packs.

If you like my work and wish to support me, you can throw me a few credits via Ko-Fi ☕

⚠️WARNING⚠️ I still need to perform thorough testing on this board. Will do once I recover all I need to turn my C16 into an usable machine.

#commodore #diy

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hkz Feb 3

Debating myself on what to do with this #commodore16 expansion.

On one hand, I'd like to test things a bit more before releasing them.
On the other I don't have many accessories ready for a #commodore16 (it'll be a while before I can get a joystick adapter made, and I need to find a non-ugly way to wire up a SD2IEC).

Don't want to hold this project too long, if people want to experiment with it. Was thinking of writing the readme and add a big-ass "WARNING: seems to work but still needs to undergo a lot of testing".

What do you think?

hkz Feb 2

So... This may be a rather trite question, but...
How do you call a #commodore16 with 64kB of RAM?

Because it looks like the SRAM Adapter decided to work on the first try. Which surely means it's going to break in nasty and difficult to debug ways.
#mod #retrocomputing

ytm Feb 1

Here is another project I've been working on: https://github.com/ytmytm/1551-RAMBOard-FirstBank

It's a RAMBOard, but for 1551. As far as I know this is the first of its kind. Just like on 1541-II a small daughterboard that plugs into the ROM socket. It adds 8K of RAM ($8000-$9FFF) plus 8K of extra ROM space ($A000-$BFFF).

There is a patched ROM which uses the extra RAM as a track cache: it reads the entire track in one disk revolution, then serves subsequent sector reads from memory. Same idea as the track caching ROMs I did for 1541 and 1571.

The project also includes a tiny fastloader wedge (HypaRAM) that calls the code embedded in the patched ROM. The same fastloader is already supported by the latest version of Parobek ROM for C16/116/Plus4.

The performance is on par with DolphinDOS - about 27x faster than a stock 1541, about 7x faster than a stock 1551.

#commodore #commodore16 #plus4 #hardware #8bit #cbm

hkz Jan 28

And once I'm done with the Flaccid Ostrich, there'll be this little thing to deal with: the #Commodore16 SRAM expansion. Fingers crossed that it won't be too painful to get working.