Search by property

This page provides a simple browsing interface for finding entities described by a property and a named value. Other available search interfaces include the page property search, and the ask query builder.

List of results

• ULA Y Offset Register  + (Pixel Y offset (0..191) to use when drawing ULA Layer.)
• Next Memory Bank Select  + (Provides additional bank select bits for extended memory.)
• Extended Keys 0 Register  + (Read Next keyboard compound keys separately)
• Extended Keys 1 Register  + (Read Next keyboard compound keys separately)
• Extended MD Pad Buttons  + (Reading additional buttons on MD pads)
• TBBlue Register Access  + (Reads and/or writes the selected TBBlue control register.)
• Kempston Mouse Buttons  + (Reads buttons on Kempston Mouse.)
• UART RX  + (Reads data from serial port, write sets the baudrate)
• Kempston Joystick  + (Reads movement of joysticks using Kempston interface.)
• Sprite port-mirror Attribute 0 (with INC) Register  + (Same as [[:Sprite port-mirror Attribute 0 Register|Sprite port-mirror Attribute 0 Register]] ($35) (write first byte of sprite-attributes), plus increments [[:Sprite port-mirror Index Register|Sprite port-mirror Index Register]] ($34))
• Sprite port-mirror Attribute 3 (with INC) Register  + (Same as [[:Sprite port-mirror Attribute 3 Register|Sprite port-mirror Attribute 3 Register]] ($38) (write fourth byte of sprite-attributes), plus increments [[:Sprite port-mirror Index Register|Sprite port-mirror Index Register]] ($34))
• Sprite port-mirror Attribute 1 (with INC) Register  + (Same as [[:Sprite port-mirror Attribute 1 Register|Sprite port-mirror Attribute 1 Register]] ($36) (write second byte of sprite-attributes), plus increments [[:Sprite port-mirror Index Register|Sprite port-mirror Index Register]] ($34))
• Sprite port-mirror Attribute 2 (with INC) Register  + (Same as [[:Sprite port-mirror Attribute 2 Register|Sprite port-mirror Attribute 2 Register]] ($37) (write third byte of sprite-attributes), plus increments [[:Sprite port-mirror Index Register|Sprite port-mirror Index Register]] ($34))
• Memory Mapping Mode  + (Select memory mapping mode)
• Memory Paging Control  + (Selects active RAM, ROM, and displayed screen.)
• TBBlue Register Select  + (Selects active port for TBBlue/Next feature configuration.)
• Sprite port-mirror Index Register  + (Selects sprite index 0..127 to be affected by writes to other Sprite ports (and mirrors).)
• Memory management slot 0 bank  + (Selects the 8k-bank stored in 8k-slot 0 (see [[Memory map]]).)
• Memory management slot 1 bank  + (Selects the 8k-bank stored in 8k-slot 1 (see [[Memory map]]).)
• Memory management slot 2 bank  + (Selects the 8k-bank stored in 8k-slot 2 (see [[Memory map]]).)
• Memory management slot 3 bank  + (Selects the 8k-bank stored in 8k-slot 3 (see [[Memory map]]).)
• Memory management slot 4 bank  + (Selects the 8k-bank stored in 8k-slot 4 (see [[Memory map]]).)
• Memory management slot 5 bank  + (Selects the 8k-bank stored in 8k-slot 5 (see [[Memory map]]).)
• Memory management slot 6 bank  + (Selects the 8k-bank stored in 8k-slot 6 (see [[Memory map]]).)
• Memory management slot 7 bank  + (Selects the 8k-bank stored in 8k-slot 7 (see [[Memory map]]).)

• UART TX  + (Sends byte to serial port. If read, tells if data in RX buffer)

• Keyboard  + (Series of specific ports that read keyboard key presses.)
• CPU Speed Register  + (Sets [[CPU Speed control|CPU Speed]], reads actual speed.)
• Sprite Status/Slot Select  + (Sets active sprite-attribute index and pattern-slot index, reads sprite status.)
• Clip Window Layer 2 Register  + (Sets and reads clip-window for Layer 2.)
• Clip Window Sprites Register  + (Sets and reads clip-window for Sprites)
• Clip Window Tilemap Register  + (Sets and reads clip-window for Tilemap.)
• Clip Window ULA/LoRes Register  + (Sets and reads clip-window for ULA/LoRes layer.)
• I2C clock  + (Sets and reads the I2C SCL line.)
• I2C data  + (Sets and reads the I2C SDA line)
• Peripheral 1 Register  + (Sets joystick mode, video frequency and [[Scandoubler]].)
• Peripheral 4 Register  + (Sets scanlines, AY mono output, Sprite-id lockstep, reset DivMMC mapram and disable HDMI audio.)
• Global Transparency Register  + (Sets the "transparent" colour for Layer 2, ULA and LoRes pixel data.)
• Layer 2 Y Offset Register  + (Sets the Y offset used when drawing Layer 2 graphics on the screen.)
• Layer 2 RAM Shadow Page Register  + (Sets the [[Memory map|bank]] number where the Layer 2 shadow screen begins.)
• Layer 2 RAM Page Register  + (Sets the [[Memory map|bank]] number where Layer 2 video memory begins.)
• Tilemap Offset X LSB Register  + (Sets the pixel offset (eight low bits) used for drawing Tilemap graphics on the screen.)
• Tilemap Offset X MSB Register  + (Sets the pixel offset (two high bits) used for drawing Tilemap graphics on the screen.)
• Layer 2 X Offset Register  + (Sets the pixel offset used for drawing Layer 2 graphics on the screen.)
• Layer 2 X Offset MSB Register  + (Sets the pixel offset used for drawing Layer 2 graphics on the screen.)
• Tilemap Offset Y Register  + (Sets the pixel offset used for drawing Tilemap graphics on the screen.)
• Video Timing Register  + (Sets video output timing variant.)
• DAC A+D (mono) mirror Register  + (SpecDrum port 0xDF / DAC A+D mirror, read current I2S LSB)
• Enhanced ULA Ink Color Mask  + (Specifies mask to extract ink colour from attribute cell value in ULANext mode.)
• Board ID  + (Spectrum next issue ID)
• Sprite port-mirror Attribute 4 (with INC) Register  + (The same as [[:Sprite port-mirror Attribute 4 Register|Sprite port-mirror Attribute 4 Register]] ($39) (write fifth byte of sprite-attributes), plus increments [[:Sprite port-mirror Index Register|Sprite port-mirror Index Register]] ($34))