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	Software News : Arnold on Amiga
	posted by drHirudo on 17-May-2006 20:12:51 (2246 reads)

The Amstrad CPC emulator Arnold has been ported to AmigaOS 4. Click here for a screenshot of here to download it.

Features:

Arnold is very accurate and there is a small number of programs (mainly demos) that do not display correctly (especially those which use "horizontal splitting" technique). Arnold should run 99% of all programs and will run these as they would on a real CPC.

Arnold has been written to be portable and to be the most accurate Amstrad CPC and KC Compact emulation, and emulates many undocumented features.

+ Full 1us cycle emulation
+ undocumented features of the CPC+ asic
+ undocumented features of the various CRTC types
+ undocumented opcodes of the Z80
+ full support for Z80 interrupt mode 0, 1 and 2; interrupt mode 0 and mode 2 work as they would on the CPC+
(vectored interrupts supported, and the weird instruction execution of IM0)
+ all the features of the CPC+ hardware (including the incompatibilities between the CPC+ and the CPC)
+ all the features of the CPC hardware
+ Genius mouse
+ Digital joysticks
+ different ram expansions: DK'tronics 64k or Dk'Tronics 256K Silicon Disc
+ Multiface 2 (the final model with automatic switch)
+ Digiblaster 8-bit D/A sound device
+ Inicron RAMROM device
+ tape emulation using tape images or sampled/digitised sounds
+ disk emulation using disk images
+ CPC+ cartridge emulation using cartridge image files
+ scan-line interrupts from the Z8536 CIO for the KC Compact
+ undocumented operation of the AY-3-8912 I/O ports.

Not emulated:

- undocumented mode 3 in KC Compact mode
- analogue joysticks
- not all operations of the Z8536 in the KC Compact
- not all operations of the 8255 in the CPC are supported
- interrupt vector bug of CPC+ ASIC.
- keyboard "clash"
- undocumented flags are not perfect for all commands.
- cycle-level disc access; programs do not load at real speed.
- other Amstrad hardware...
- the sound emulation could do with more work
- the effects of the monitor hsync and vsync which produces bending patterns
with some programmed values
- monitor brightness control
- still many bugs with the CRTC emulations.

Other features:

+ ASL requesters.
+ Support for USB Joysitcks via Amiga Input.
+ Double size mode.

Bugs:

- uses all the cpu resources.
- slower in fullscreen mode than in window.
- renders graphics only on 32-bit depth.
- when emulating some noises - the emulator crashes - represented when playing "Space Harrier".
- double size mode is slow.
- when set frameskip, the emulator speeds up instead of working at 100% speed and skipping frames.

STORYID: 3094

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Toaks

Re: Arnold on Amiga.
Posted on 18-May-2006 7:08:21

[ #1 ]

Elite Member

Joined: 10-Mar-2003
Posts: 8042
From: amigaguru.com

keep up the good work doctor

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Status: Offline

JurassicC

Re: Arnold on Amiga.
Posted on 18-May-2006 7:48:42

[ #2 ]

Super Member

Joined: 13-Mar-2003
Posts: 1441
From: Somerset, UK

;)

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Status: Offline

TrebleSix

Re: Arnold on Amiga.
Posted on 18-May-2006 8:32:36

[ #3 ]

Elite Member

Joined: 6-Sep-2004
Posts: 3747
From: Pembrokeshire, Wales

Good work, ain't seen a Amstrad screenshot for yonk!

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Status: Offline

Skunkfish

Re: Arnold on Amiga.
Posted on 18-May-2006 12:56:39

[ #4 ]

Regular Member

Joined: 9-Sep-2004
Posts: 295
From: Liverpool, UK

Hehe, Amstrad CPC is my first computer.
I mean literally, I use it more than my PC and Amiga

Good work old chap, maybe a port of WinAPE would be good too..

Skunkfish