Changing the size of memory or changing the ROM version forces a reset of the PET.
The emulator has an IEEE-488 device at address 8. It can be used load and save (.prg) files.
Some programs don't run on ROM1 and some require more memory than the default 8K.
Tut-Tut started life as a type in magazine listing for the ZX Spectrum by David Stephenson.
From there came versions for the ZX81, a fuller ZX Spectrum version, and later versions for the Jupiter Ace / Minstrel 4th and TRS-80 MC-10.
I have now taken Tut-Tut to the Commodore PET or Mini PET. This version is closest to the ZX81 version, but adds features such as sound and pause from the ZX Spectrum version.
It will run on most Commodore PETs (other than the 2001 with the built in datasette) and Mini PETs. It needs 32K of RAM, BASIC 4.0 and runs on a 40 column screen.
Physical copies on cassette are also available from :
https://www.thefuturewas8bit.com/cas024.html