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Pentagon 1024SL - MAME machine

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pent1024
Pentagon 1024SL
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GAME SYSTEM CHD BIOS DEVICE PARENT CLONE MECHANICAL SCREENLESS

Main data
Romset and name:
pent1024 Pentagon 1024SL
Short name:
Pentagon 1024SL
Manufacturer:
Alex Zhabin
Year:
Genre:
Computer
Category:
Computer / Home System
Serie:
-
Driver source:
sinclair/pentagon.cpp
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
Average user rating:
AntoPISA BestGame:
-
MASH All-Time:
-
Video
Display:
352x288@48.828125 Hz, CRT 15kHz
Orientation:
Horizontal
Scrolling:
Unknown
Colors:
-
CPU:
Zilog Z80
Audio
Sound:
7 audio channel
Audio chips:
AY-3-8912A PSG, Cassette, Filtered DAC, Floppy sound, Speaker
Romset
First release:
Mess 0.132 released on jun-09 2009
Last release:
Mame 0.264 released on mar-26 2024
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:
Not supported
Additional infos
  • History
  • Info
  • Score
  • PCB
  • Commands
  • Init
  • Driver
  • XML
  • NOTICE: These are informations from parent game spec128 - ZX Spectrum 128
    Computer published 38 years ago:

    ZX Spectrum 128 © 1986 Sinclair Research, Limited.

    New features included 128 KB RAM, three-channel audio via the AY-3-8912 chip, MIDI compatibility, an RS-232 serial port, an RGB monitor port, 32 KB of ROM including an improved BASIC editor, and an external keypad.

    TECHNICAL
    The appearance of the ZX Spectrum 128 was similar to the ZX Spectrum+, with the exception of a large external heatsink for the internal 7805 voltage regulator added to the right hand end of the case, replacing the internal heatsink in previous versions.

    The Z80 processor used in the Spectrum has a 16-bit address bus, which means only 64 KB of memory can be directly addressed. To facilitate the extra 80 KB of RAM the designers used bank switching so that the new memory would be available as eight pages of 16 KB at the top of the address space. The same technique was also used to page between the new 16 KB editor ROM and the original 16 KB BASIC ROM at the bottom of the address space.

    The new sound chip and MIDI out abilities were exposed to the BASIC programming language with the command PLAY and a new command SPECTRUM was added to switch the machine into 48K mode, keeping the current BASIC program intact (although there is no way to switch back to 128K mode). To enable BASIC programmers to access the additional memory, a RAM disk was created where files could be stored in the additional 80 KB of RAM. The new commands took the place of two existing user-defined-character spaces causing compatibility problems with some BASIC programs.

    The ZX Spectrum 128 had no internal speaker like its predecessors. The sound was produced from the television speaker instead

    TRIVIA
    Code-named 'Derby'. Sinclair developed the ZX Spectrum 128 in conjunction with their Spanish distributor Investrónica. Investrónica had helped adapt the ZX Spectrum+ to the Spanish market after the Spanish government introduced a special tax on all computers with 64 KB RAM or less, and a law which obliged all computers sold in Spain to support the Spanish alphabet and show messages in Spanish.

    The machine was simultaneously presented for the first time and launched in September 1985 at the SIMO '85 trade show in Spain, with a price of 44,250 pesetas. Because of the large number of unsold Spectrum+ models, Sinclair decided not to start selling in the UK until January 1986 at a price of £179.95.

    CONTRIBUTE
    Edit this entry: https://www.arcade-history.com/?&page=detail&id=83040&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
    NOTICE: The short version was discontinued in November 2019
  • 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 march 26 2024


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Romset:
pent1024
Title:
Pentagon 1024SL
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