Classic 8080 - marinus-lab/z88dk GitHub Wiki

After a few decades of not supporting 8080 code generation, z88dk can once again generate code that will run on 8080 and 8085 based computers.

The z88dk classic library also supports compiler intrinsic (l_) functions optimised for 8080, 8085, gbz80, or z80 CPUs. Specifically, the undocumented 8085 instruction extensions to the 8080 instruction set are supported and are used where appropriate, and gbz80 specific instructions are also issued where appropriate.

• PMD85
• Vector06c
• Corvette
• Mikro 80
• Specialist
• DAI
• Radio 86
• Altair 8800
• LVIV
• Krokha
• Sol20

Additionally, the CP/M target can generate 8080 binaries. To do so, add the option -clib=8080 to the command line. For example:

zcc +cpm -clib=8080 adv_a.c

A .bin file will be generated that should run on 8080 based CP/M machines.

• TRS80 Model 100
• Micro85
• RC2014 using the 8085 CPU Module

The RC2014-8085 support consists of two subtypes specifically for use with the 8085 CPU Module.

The basic85 subtype produces a HEX file for use with the Microsoft Basic ROM (the appropriate floating point library can be linked for use either with or without the APU Module), and can be uploaded to the RC2014 using the HLOAD Basic keyword.

Additionally, both the RC2014 basic and basic85 subtypes are supported by the z88dk-ticks emulator. Where the resulting binary just needs to be titled rc2014.bin, and emulated with the correct machine type.

zcc +rc2014 -subtype=basic85 my_c_file.c my_asm_file.asm -o my_hex_file -create-app

The acia85 subtype produces a HEX ROM file that provides serial interfaces using the RC2014 ACIA Serial Module.

zcc +rc2014 -subtype=acia85 my_c_file.c my_asm_file.asm -o my_hex_rom_file -create-app

The 8080/5 CPU implements a subset of the z80 instruction set that the compilers and libraries within z88dk have traditionally targeted. As a result not all features are available. If you use a feature that is not available then your program will fail to link.

The following features from <stdio.h> are not available in the 8080/5 library:

• funopen() and stdio pluggable device support
• Floating point support for the scanf family

The following features from <stdlib.h>are not available in the 8080/5 library:

• z88dk extension: extract_bits

There are two maths libraries that are available for the 8080/8085: dai32, extracted from the DAI ROM, and mbf32 Microsoft Basic Floating Point, extracted from Microsoft Basic 4.7 and optimised for the 8080, 8085, gbz80, and z80 CPUs.

The RC2014 8085 has access to the am9511_8085 maths library when it is equipped with an APU Module. This maths library supports long and float operations with the APU, and provides a substantial performance gain over software floating point support.

Aliases are available for specific CPU types to simplify the use of any of these maths libraries.

The following extension libraries are not available in the 8080/5 library:

• Allocation: balloc
• Algorithm/adt: All
• Debug library

Only sccz80 supports generation of 8080 and 8085 code.