Oct 022019
 

A new version of the Retro Virtual Machine by Juan Carlos Gonzalez Amestoy was released. It is a modern multi-platform emulator for Windows, Linux and MacOS. Currently it supports the emulation of an Amstrad CPC 464, 664 and 6128 and also different Sinclair computers. Besides that it is also feature packed with for e.g. realistic CRT emulation and devices like the X-Mem, the CPC Dandanator or the AMX mouse. Hopefully more will come in the future. Needless to say that it also supports tape and floppy emulation and features extended development features like debugger and integrated assembler.

But have a look by yourself:

The Retro Virtual Machine immediatly became my favourite emulator, so if you want to test it, too, head over to the Retro Virtual Machine homepage and download it for your favourite operating system.

Features:

  • Multiplatform
    • Windows (Vista+)
    • Linux
    • MacOs (10.9+)
  • Multi System
    • ZX Spectrum
      • ZX Spectrum 16k
      • ZX Spectrum 48k (issue2/3/+/+English)
      • ZX Spectrum 128k (eng/spa)
      • ZX Spectrum +2 (eng/spa/fr)
      • ZX Spectrum +2A (4.0eng/4.0spa/4.1eng/4.1spa)
      • ZX Spectrum +3 (4.0eng/4.0spa/4.1eng/4.1spa)
      • ZX Spectrum +2E (eng/spa)
      • ZX Spectrum +3E (eng/spa)
      • Inves Spectrum +
      • ZX-Uno (v4.1/v4.2)
    • Amstrad CPC
      • Amstrad CPC 464 (CRTC-0)
      • Amstrad CPC 664 (CRTC-0)
      • Amstrad CPC 6128 (CRTC-0)
    • Multi machine
      • Possibility of opening several machines in parallel
    • Virtual Cassette
      • Support TAP,TZX,PZX,CSW,CDT in playback or recording.
    • Floppy disks
      • Low level disc (mfm)
      • New implementation of upd765
      • HFE/DSK support
    • Monitor
      • Emulation of synchronism (H-sync/V-sync)
      • New Shader
    • Joysticks / Gamepad
      • Autodetection
    • Devices
      • ZX Spectrum
      • DivMMC
      • Kempston Mouse
      • Magic-AY
      • Turbo Sound
    • Amstrad CPC
      • X-Mem
      • CPC Dandanator
      • AMX Mouse
    • Supported file systems in the integrated explorer
      • FAT 16
      • FAT 32
      • CPM
    • SD Emulation (SPI)
      • SD (max 2GB)
      • SDHC (max 32GB)
    • Development system (ALPHA)
      • Editable hexadecimal view
      • Editable disassembly view
      • Multiple monitors
      • Assembler with LUA pre-processor
      • Command terminal

Jul 242017
 

Roudoudou released a new version of his Zilog Z80 cross-assembler called Rasm. Of course it supports all the undocumented opcodes, but beside of that, you can use conditional macros, a floating point engine and several mathmatical functions. A special feature is the possibility to create a cartridge for the Amstrad Plus or the Amstrad GX4000 directly by assembling your source code and you can automatically add an AMSDOS header to your binaries. It also supports crunched sections (the coded will be loaded and crunched on the fly) for LZ48, LZ49, LZ4, ZX7, and Exomizer. It has also a compatibility option to support the widely in the Amstrad CPC used MAXAM syntax. You can download and discuss it at the CPCWiki forums and at the end of this news.

Changes in v0.57

  • more flexible preprocessor with macro parameters
  • new label prefix tag {BANK} to get the bank where is located a label

 

Mar 202017
 

Roudoudou released a brand new Zilog Z80 cross-assembler that targets the Amstrad CPC. Of course it supports all the undocumented opcodes, but beside of that, you can use conditional macros, a floating point engine and several mathmatical functions. A special feature is the possibility to create a cartridge for the Amstrad Plus or the Amstrad GX4000 directly by assembling your source code and you can automatically add an AMSDOS header to your binaries. However, it currently does not support the Maxam assembly syntax.
The latest version contains a lot of bugfixes (local labels, macro, label tree, alias, …) and a documentation in french and english. You can download and discuss it at the CPCWiki forums and at the end of this news.

Update 21.03.2017
Roudoudou released a new version v0.42 with the following changes:

  • allow old style label declaration with a starting dot
  • allow useless A, register form with ADC, ADD, SBC, SUB
  • extended syntax for 8bits index registers
  • documentation FR/EN updated

Update 31.03.2017 – Rasm v0.48

  • bugfix of label calculations when placed after a LZ48/LZ49 block (there is a buf left with more than one LZ section in the same ORG)
  • directives SWITCH/CASE/DEFAULT/ENDSWITCH added
Rasm - Z80 assembler
Rasm - Z80 assembler

rasm_v040.zip
Version: v0.40

234.8 KiB
218 Downloads
Details
Rasm v0.42 - Z80 assembler
Rasm v0.42 - Z80 assembler

rasm_v042.zip
Version: v0.42

237.4 KiB
207 Downloads
Details
Dec 312016
 

Roudoudou worked on a compressor / decompressor which uses the LZ48 / LZ49 compression algorithm on the Amstrad CPC and released his work in the CPCWiki forums. The compressor is inspired by the LZ4 compression algorithm of Yann Collet and the modifications fits well to the Z80 CPU of the Amstrad CPC. The advantage of this compression method is, that the decompression code is very small (83 bytes) and very fast. The disadvatage is that there are other compressors which feature a better compression ratio, but require more memory and more time for decompression as well.
You can get more information about the modified algorithm and download the assembly source from the CPCWiki forums. You can also find a version for SDCC / CPCtelera and binary files for Windows there.

LZ48/49 (de)compressor
LZ48/49 (de)compressor

LZ48-49-de-compressor.zip

16.5 KiB
249 Downloads
Details
Dec 312016
 

Docent wrote a decompressor the the LZ4 compression algorithm, which can be used on any Zilog Z80 CPU. The focus of the LZ4 compression algorithm is a fast decompression speed and a small decompression routine. The size of Docents version of the decompression routine is 219 bytes (raw decompression routine under 110 bytes) and it supports the legacy and the newest LZ4 format (except for framing).
You can download the latest version of the decompression code here or at the end of this news.

Features

  • decompresses files packed by lz4 command line packer and raw lz4 compressed data
  • supports legacy and the newest lz4 file format (except framing)
  • fully relocatable code
  • total size of 219 bytes size with raw decompression routine below 110 bytes
  • cpc firmware friendly (no alternate register set used)
  • ROM friendly – no self modifying code or additional memory required
  • simple interface – only start of file in memory and target memory destination required

 

LZ4 Decompressor
LZ4 Decompressor

LZ4-Decompressor.zip

7.0 KiB
173 Downloads
Details

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