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ZX Spectrum +3

  1. Game infos
  2. Parent and Clones
  3. Sound
  4. Driver
  5. Inputs
  6. Controls
  7. Display
  8. Configurations
  9. Roms list
  10. BIOS set
  11. Chips list
  12. Categories
  13. History
Download specpls3.zip (0 B)
Snapshot

Game infos

Description ZX Spectrum +3
Name specpls3
Manufacturer Amstrad plc
Year 1987
Runnable yes
System arcade /
Number of players Non-arcade
Added to MAME .036b16
Romset size 0 B
Romset file files
Romset zip 0 B
Genre Computer

Parent and clones

Parent spec128 : ZX Spectrum 128 (1986)

Sound infos

Sound_channels 3

Driver infos

Driver status good
Driver emulation good
Driver color good
Driver sound good
Driver graphic good
Driver cocktail
Driver protection
Driver savestate yes

Inputs infos

Input service no
Input tilt no
Input players 1
Input buttons
Input coins

Controls infos

type ways minimum maximum sensitivity keydelta reverse
keyboard no

Display infos

type rotate flipx width height refresh pixclock htotal hbend hbstart vtotal vbend vbstart
raster 0 no 352 296 50.01 7092218 456 0 352 311 0 296

Configuration

name tag mask
Hardware Version
Name Issue 2
Value 0
Default yes
Name Issue 3
Value 128
Default no

CONFIG
 128
Joystick Interface
Name Fuller
Value 2
Default no
Name Kempston
Value 1
Default yes
Name Mikrogen
Value 3
Default no
Name None (No Joystick)
Value 0
Default no

JOY_INTF
 15

Roms list

console name bios size crc md5 merge sha1 region offset status optional
arcade p3_01_4m.rom 4ms 32768 ad99380a 4e5d114b72d464cefdde0566457f52a3c0c1cae2 maincpu 10000 good no
arcade p3_01_cm.rom 12ms 32768 ad99380a 4e5d114b72d464cefdde0566457f52a3c0c1cae2 maincpu 10000 good no
arcade p3_23_4m.rom 4ms 32768 07727895 752cdd6a083ab9910348995e483541d60bb6372b maincpu 18000 good no
arcade p3_23_cm.rom 12ms 32768 61f2b50c d062765ceb1f3cd2c94ea51cb737cac7ad6151b4 maincpu 18000 good no
arcade pl3-0.rom en 16384 17373da2 e319ed08b4d53a5e421a75ea00ea02039ba6555b maincpu 10000 good no
arcade pl3-1.rom en 16384 f1d1d99e c9969fc36095a59787554026a9adc3b87678c794 maincpu 14000 good no
arcade pl3-2.rom en 16384 3dbf351d 22e50c6ba4157a3f6a821bd9937cd26e292775c6 maincpu 18000 good no
arcade pl3-3.rom en 16384 04448eaa 65f031caa8148a5493afe42c41f4929deab26b4e maincpu 1c000 good no
arcade plus341.rom en41 65536 be0d9ec4 500c0945760abeefcbd08bc22c0d07b14b336cf0 maincpu 10000 good no
arcade plus3sp0.rom sp 16384 1f86147a e9b0a60a1a8def511d59090b945d175bdc646346 maincpu 10000 good no
arcade plus3sp1.rom sp 16384 a8ac4966 4e48f196427596c7990c175d135c15a039c274a4 maincpu 14000 good no
arcade plus3sp2.rom sp 16384 f6bb0296 09fc005625589ef5992515957ce7a3167dec24b2 maincpu 18000 good no
arcade plus3sp3.rom sp 16384 f6d25389 ec8f644a81e2e9bcb58ace974103ea960361bad2 maincpu 1c000 good no

BIOS set

name description default
12ms Customize 3.5" 12ms yes
4ms Customize 3.5" 4ms yes
en English v4.0 yes
en41 English v4.1 yes
sp Spanish v.40 yes

Chips list

name tag type clock
AY-3-8912A ay8912 audio 1773400
Filtered 1-bit DAC speaker audio
Floppy sound upd765:1:3ssdd:floppysound audio 44100
Speaker upd765:1:3ssdd:flopsndout audio
Wave wave audio
Z80 maincpu cpu 3546895

Categories

History


Computer published 32 years ago:

ZX Spectrum +3 (c) 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:
1. 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.
2. Dividing ROMCS into 2 lines, to disable both ROMs.
3. 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.
4. The keypad scanning routines from the ROM were removed.
5. 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