Minimal Z80 assembly to write HELLORLD* on the VFD of a Verifone Tranz 330 credit card terminal
The Tranz 330 is a Zilog Z80 based credit card terminal that uses standard Z80 peripherals and is very hacker friendly. As of 2023 these are still plentiful and cheap on the used market.
* not Hellorld! because the 14 segment VFD can't print exclamation points or lowercase
- Be a Linux user
- Have a Tranz 330, 27C256 EPROM or flash and means to program
- Build zasm: https://github.com/Megatokio/zasm
- If flashing from here, install minipro CLI: https://gitlab.com/DavidGriffith/minipro/
- export ZASM_PATH=/path/to/zasm/tree
- make
- Make sure Makefile "ROM_IC" is the right type for your EPROM or flash
- If using an EPROM, "make burn", and if using flash, "make flash"
- Install ROM
- Power it up
HELLORLD