FMan wrote:
So there is also the DMA controller implemented on the FPGA?
Ofcourse, all emulated hardware is contained by the FPGA.
FMan wrote:
What about a possibility of using two computers - one to control the operation with the device plugged into its expansion port and another that actually uses it for disk operations and connects only via serial cable?
That works fine.
FMan wrote:
But did I read something about changing images and navigating directories being doable without any software on the computer but an "extended" DOS on the emulated drives?
The cartridge has an emulated 1541 drive. To insert disks in 'stand-alone'-mode there is a second drive interface. This is not an emulated drive but a simple IEC to SD card interface. It has it's pwn DOS. This DOS understands some special commands that allows you to 'mount' D64 files as a disk in the emulated 1541. Buttons can be used to mount the next or previous file in a directory. This is because you cannot use the IEC as a command interface when you are in a game that asks to insert the next disc.
A cartrige that simplifies basic commands is recommended (as build-in) since sending IEC commands stock basic requires quite some typing.
Hope this answers your questions.