Post has attachment

Post has attachment

Post has attachment

Post has attachment

Post has shared content
This looks interesting. When it comes out on CrowdSupply, I think I'll take a whack at it.

Here are the specs:
• 50 MHz eZ80 CPU
• 256 k code flash memory
• 1 Mb zero wait state RAM
• USB/UART bridge
• Battery-backed real-time calendar clock
• FAT filesystem micro-SD card
• Connector for prototyping/expansion board gives access to GPIOs, USB keyboard, and VGA Display (prototyping/expansion, USB controller, and VGA controller boards available as accessories)

Here's a bit more info on it: https://blog.hackster.io/the-credit-card-size-makerlisp-machine-puts-an-ez80-computer-in-your-wallet-230e53901b02

It got a mention on the MickMake Youtube roundup this week. You can hear his mention of it around the 8:23 mark on this video: https://youtu.be/VX0U6HhrXQg

https://www.crowdsupply.com/cp-maker/makerlisp-machine
MakerLisp Machine
MakerLisp Machine
crowdsupply.com

Post has shared content
Spectrum 128K with DivIDE interface now running Fuzix.

It's not the best of platforms. Only the top 16K of memory is actually switchable on the 128K spectrum so the task switching involves a lot of memory copying and exchanging, the routines for which I've not yet optimised.

The low 16K can at least be turned into usable memory on most of these interfaces which helps. The memory is actually mostly meant for the BASIC and OS extras but fortunately it turns out that one of the standard firmware sets (FATware 0.14) loads 8K off disk into the lowest 8K memory of the interface and the locks it (until reset)

There is no checking - which means it happily loads any 8K into the bottom of the address space and runs it, in my case the lowest chunk of Fuzix, the Fuzix rst vectors and a small loader to load the rest.

The various DivMMC interfaces should also work this way, but will need a different loader in the 8K chunk.

Many of the eastern european clones have more than 128K of RAM and can also map 16K of RAM in the bottom of memory so hopefully this is a basis to support them too.

There are a few other minor details to make it spectrum friendly - in particular the usual spectrum blue/red stripes in the border while doing disk activity 8)

Photo

Post has attachment

Post has attachment

Post has attachment

Post has attachment
Wait while more posts are being loaded