Vezza

Vezza
Interpreter
Links	Home page Download
Developer	Shawn Sijnstra
Format	Z-code
Interaction style
Systems	CP/M, Amstrad CPC, Amstrad PCW, Apple II, Atari 400/800, MSX, MSX2, Sinclair ZX Spectrum, Tandy TRS-80, Other
System details	Requires minimum z80 and CP/M 2.2 or CP/M 3. Current builds support VT-52, ADM-3a, HGT, VT-100, VT-100 with ANSI colour, and Soroc 120 terminal emulations. Various platform builds tested and available. Atari requires FujiNet/DT80. Supported platforms not listed include Agon, MicroBee and SAMCoupe.
Latest version	Pre-release / 30 Sep 2023
Status	Beta
Uses interpreter
Multimedia support	No multimedia
License	Mixed GPL 2
Notes	Note that this interpreter cannot simply be downloaded and run to play game files.
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Vezza is a Z-machine interpreter for CP/M version 3 and above, requiring a z80 CPU minimum. Tested on multiple hardware versions. It was written by Shawn Sijnstra, ported from M3ZVM and M1ZVM.

Vezza supports Z-machine versions 1, 2, 3, 4, 5, 6*, 7, and 8 within memory limitations. z6 support is limited to non-graphics and has many workarounds to reduce to the standard screen model.

Core code licensed under GPL version 2.

Download binaries, along with a fuller list of features and limitations from Vezza on Gitlab

There is also an Agon Light version available, and some pre-built disks for MSX1/2 and CPC/PCW.

Features

• Full use of screen width where possible
• Use of highlighting or substitutes where possible
• Accented characters are translated
• Command line switch to optionally enable the Tandy bit
• Named game save and load
• Timed input (limited to 1 second resolution)
• z1-z5 games recommended
• Has a small LRU disk cache to reduce I/O
• Allows game with up to 22k Dynmem to run (up to 37K in banked CP/M versions so even Trinity will run)

Limitations

• Timer not supported on Atari/FujiNet, SAMCoupe, RunCPM, CP/M 2.2 versions
• See web site for more details