* The following are not connected on GX4000 so the associated inputs are not defined (possibly high):
** Printer (data and strobe) ** Keyboard lines 0,1,2,4,5,7,8 ** FDC ** FDD motor ** Cassette read, write, motor ** The signals /ROMEN, ROMDIS, /RAMRD, RAMDIS, CRTC CURSOR, EXP, Printer BUSY
* When a system cartridge is inserted (this has been verified with a yellow and a green labelled system cartridge), the copyright message and a Ready prompt is displayed. If the fire buttons or directions are pressed on the first digital joystick you see X,Z and the arrows displayed, the same as if you had pressed these buttons on a 464/6128 Plus or CPC. Pressing Pause displays "P".
== Accessing the Plus hardware improvements ==
'''The Plus''' and GX4000 cartridges access the Plus hardware improvements, but specific software can be created using the extra features without the need of cartridge hardware (contrary as it was claimed by Amstrad in 1991). The extra features are not locked by a hardware mechanism but only by a special 17 bytes-length sequence send to the CRTC. So, it's possible for everyone to create his/her own software on the Plus, using the extra features available through a [[ASIC]] I/O page. Except the extra-features, the 464 and 6128 Plus machines are almost fully compatible with the classic CPC generation. Some minor differences are noticeable in the components ([[8255|PPI]], [[CRTC]], [[Gate Array]][[Gate Array]]) contained in the ASIC and in the interrupt mechanism in vectorised mode.
For details about the Plus/GX4000 hardware features, see [[Arnold V Specs Revised]].
*[[LiquidSnake|LiquidSnake]] by [[Revival|Revival]]
*[[Sappy|Sappy]] by [[Semilanceata|Semilanceata]]
*[[Schnapps|Schnapps]] by [[Shining|Shining]]
*[[Simply The Bests|Simply The Bests]] by [[Eliot|Eliot]]
*[[Seminoisin|Seminoisin]] by [[Semilanceata|Semilanceata]]
* [[Heat Demo]] by [[Odiesoft]]
* [[Fire Engine demo]] (attributed to [[Roo-dolph]] but unreleased?)
* [[NQ!-Music Disc]] by [[Shining]]
* [[System Party 97]] by [[Eliot]]
* [[Texture Mapping Plus]] by [[Odiesoft]]
These cartridges work on Plus and GX4000.
* [[Bears!]]
* [[Blue Angel 69]]
* [[Ghosts 'n' Goblins]]
* [[Puzznic]]
* [[Stryker and the Crypts of Trogan]]
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25th Anniversary Special By Novabug with Guru Larry
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Unboxing & Playtest by Novabug
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== Emulators for the Plus ==
* [[Arnold]]
* [[WinApe]]
* [[MESSMAME]]
* [[NO$CPC]]
* [[MTMW]]
* [[ACE_(Emulator)|ACE CPC Emulator]]
* [[ACE-DL]]
* [[Caprice Forever]]
* [[CPCEC]]
* [[Retro Virtual Machine]]
* [[SugarBox]]
== Weblinks ==