This is an emulation of the Amstrad CPC 664, with one disk drive.
The rom is 48KB and comprises OS664 + BASIC664 + AMSDOS.
It uses a PS/2 keyboard connected to the us2 USB port.
The output is 640x480 VGA over HDMI.
Audio is supported (mono only).
It supports an OSD for for loading floppy disk images with a .dsk extension.
It only works on an 85F because of the amount of BRAM it uses.
You need to run micropython on the ESP32 and copy the files in the esp32 directory to it.
To start the OSD, you need to do "import osd" in the micropython repl.
Once you have programmed the bitstream, you should see the "Amstrad 64K Microcomputer (v2)" message and a BASIC 1.1 prompt.
To load a .dsk image you press all four direction buttons to start the OSD, select the required file, and press the right button.
You can then use the "cat" command to list the disk's contents and the "run " command to run a program from the disk.
BRAM is used for video memory so it is fixed at address 0xC000.
The CPU runs at 4MHz but it slightly faster than a real Amstrad CPC as the CPU and video generator do not share memory.
Only one disk is supported and it is read-only.
No extra roms are supported.
There is no joystick support.
Tape loading is not supported.
The implementation is entirely in Verilog and is based on ulx3s_z80_template.
Some of the code comes from the Mist/Mister implementations, the Z80 CPU is from @hoglet67's ice40 cores. The OSD and related Ulx3s code is mainly by @emard.
New code is the top level and VGA-mode video driver.
Floppy disk access is unreliable and many games hang.
Colors are wrong in some modes.