HISTORY
FAST SEARCH
Type:
 
Parents and clones:
Romset:

ZX Spectrum +3 - MAME machine

33560
specpls3
ZX Spectrum +3
0
1
Game
current
11
0
  Back to search
  Share this page using this link:
SHARE THIS PAGE

GAME SYSTEM CHD BIOS DEVICE PARENT CLONE MECHANICAL SCREENLESS

Main data
Romset and name:
specpls3 ZX Spectrum +3
Manufacturer:
Amstrad plc
Year:
Genre:
Computer
Category:
Computer / Home System
Serie:
-
Driver source:
Language:
-
Similar games:
Input / Controls
Players:
Up to 2 players
Input:
Joystick 8 ways, Keyboard
Buttons / keys:
Coins:
0
Cabinet:
-
Free-play:
Not supported
Rankings
Avarage user rating:
AntoPISA BestGame:
-
MASH All-Time:
-
Video
Display:
352x296@50.01 Hz, CRT 25kHz
Orientation:
Horizontal
Scrolling:
Unknown
Colors:
-
CPU:
Zilog Z80
Audio
Sound:
3 channels
Audio chips:
AY-3-8912A PSG, Cassette, Cassette Sound, Filtered 1-bit DAC, Floppy sound, Speaker
Romset
First release:
Mess 0.36b16 released on feb-07 2000
Last release:
Mame 0.209 released on apr-24 2019
Clone of:
spec128 ZX Spectrum 128
Bios:
Not required
Use rom of:
-
Use sample of:
-
Previous romset:
None
New romset:
None
Files
Dump:
GOOD
Required files:
Status
OVERALL:
GOOD
Emulation:
Good
Graphic:
Good
Color:
Good
Sound:
Good
Cocktail:
Good
Protection:
Good
Save state:
Unsupported
Additional infos
  • History
  • Info
  • Score
  • PCB
  • Commands
  • Init
  • Driver
  • XML
  • This Computer was published 32 years ago:

    ZX Spectrum +3 © 1987 Amstrad PLC.

    TECHNICAL
    The ZX Spectrum +3 looked similar to the +2 but featured a built-in 3-inch floppy disk drive (like the Amstrad CPC 6128) instead of the tape drive, and was in a black case.

    The +3 saw the addition of two more 16 KB ROMs. One was home to the second part of the reorganised 128 ROM and the other hosted the +3's disk operating system. This was a modified version of Amstrad's PCWDOS (the disk access code used in LocoScript), called +3DOS. These two new 16 KB ROMs and the original two 16 KB ROMs were now physically implemented together as two 32 KB chips. To be able to run CP/M, which requires RAM at the bottom of the address space, the bank-switching was further improved, allowing the ROM to be paged out for another 16 KB of RAM.

    The ZX Spectrum +3 power supply provides the same voltages as the one supplied with +2A. This power supply has the same DIN connector so can also be used with the +2A. However, the power supply purchased with the +3 had 'Sinclair +3' written on the case.

    TRIVIA
    The ZX Spectrum +3 was launched in 1987 and was the only Spectrum capable of running the CP/M operating system without additional hardware.

    Some older 48K and a few older 128K games were incompatible with the machine. Such core changes brought incompatibilities:
    • Removal of several lines on the expansion bus edge connector (video, power, and IORQGE); caused many external devices problems; some such as the VTX5000 modem could be used via the 'FixIt' device.
    • Dividing ROMCS into 2 lines, to disable both ROMs.
    • Reading a non-existent I/O port no longer returned the last attribute; caused some games such as Arkanoid to be unplayable.
    Memory timing changes; some of the RAM banks were now contended causing high-speed colour-changing effects to fail.
    • The keypad scanning routines from the ROM were removed.
    • Move 1 byte address in ROM.

    Production of the +3 ceased in December 1990, believed to be in response for Amstrad relaunching their CPC range. At the time, it was estimated about 15% of ZX Spectrums sold had been +3 models.

    CONTRIBUTE
    Edit this entry: https://www.arcade-history.com/?&page=detail&id=83043&o=2
    Informations provided by © Alexis Bousiges
    Informations provided by Contribute to the translation
  • Informations provided by
    Informations provided by / © Copyright of Fujix
  • Informations provided by
  • Informations provided by
  • Informations provided by Fabricio Coroquer, revisited from the work of
  • Informations provided by Contribute
  • Informations provided by
  • Informations provided by
Cheats:
Ports:
Devices refs:
Media options:
RAM options:
Software lists:

If you notice any inaccuracy or error, please report

Data updated on april 25 2019


Short name suggestion
The short name is the name of the game without brackets or other symbols, bios or sets informations.
Name:
E-mail:
(optional)
Image removal
You're proposing to remove this image from the web site.
Please indicate below the reason for the request and will be evaluated
as soon as possible.

Reason:
E-mail:
(optional)
Resource reporting
You can report links for further information, images, video or other url about this game.
Carefully fill out the fields below in such a way as to minimize the time required for the integration of this information in the page.
Link:
Resource type:
Title:
Notes:
E-mail:
(optional)
Game initialization (gameinit)
These data are used to solve any problems starting the game in Mame.
The specified text will be sent to the site ProgettoSnaps by AntoPISA and integrated with the existing one.
Updates are scheduled on a monthly basis so except in special cases you may not immediately see the changes.
Romset:
specpls3
Title:
ZX Spectrum +3
Text:
E-mail:
(optional)
Share page
Report this game to a friend, with optional additional message.
Game:
ZX Spectrum +3
Recipient:
Message:
From:
Create e new list
You can create a new private list, visible only to you, that will allow you to group, view or do other operations on your favorite games.
Title:
Notes:
 

You can create a list using an existing file. In this case, please indicate below.

Import from:
Trascina qui un file
XXXXXXXX
Format:
Export to a file
You can export this list of games on a file so that it can be used by external programs

Title:
Format:
Emulator:
Version:
 
This option will add all the linked rom (i.e. parents games in clones games) and all bioses or devices to obtain a working set (no missing files)
Other options
 

 

 

 

 

 

NOTE: You will be prompted to download the file. If this don't occurs, check the popup blocker options of your browser and add this site to the exception list