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{{#ask: [[Category:Next Configuration Registers]]
 |?TBRegisterNumber=Number
 |?TBRegisterReadable#Yes,No=Readable
 |?TBRegisterWritable#Yes,No=Writable
 |?ShortDesc=Description
 |format=table
 |limit=50
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The query [[Category:Next Configuration Registers]] was answered by the "SMWSQLStore" in 0.0075 seconds.

	Number	Readable	Writable	Description
Active Video Line LSB Register	$1F	Yes	No	Holds the eight LSBs of the raster line currently being drawn.
Active Video Line MSB Register	$1E	Yes	No	Holds the MSB (only, as bit 0) of the raster line currently being drawn.
Alternate ROM	$8C	Yes	Yes	Enable alternate ROM or lock 48k ROM
Anti-brick Register	$10	Yes	Yes	Used within the Anti-brick system.
CPU Speed Register	$07	Yes	Yes	Sets CPU Speed, reads actual speed.
Clip Window Control Register	$1C	Yes	Yes	Controls (resets) the clip-window registers indices.
Clip Window Layer 2 Register	$18	Yes	Yes	Sets and reads clip-window for Layer 2.
Clip Window Sprites Register	$19	Yes	Yes	Sets and reads clip-window for Sprites
Clip Window Tilemap Register	$1B	Yes	Yes	Sets and reads clip-window for Tilemap.
Clip Window ULA/LoRes Register	$1A	Yes	Yes	Sets and reads clip-window for ULA/LoRes layer.
Config Mapping Register	$04	No	Yes	In config mode, allows RAM to be mapped to ROM area.
Copper Control High Byte	$62	Yes	Yes	Holds high byte of Copper control flags.
Copper Control Low Byte	$61	Yes	Yes	Holds low byte of Copper control bits.
Copper Data	$60	No	Yes	Used to upload code to the Copper.
Copper Data 16-bit Write Register	$63	No	Yes	Used to upload code to the Copper.
Core Version Register	$01	Yes	No	Identifies core (FPGA image) version.
Core Version Register (sub minor)	$0E	Yes	No	Identifies core (FPGA image) version (sub minor number).
DAC A+D (mono) mirror Register	$2D	Yes	Yes	SpecDrum port 0xDF / DAC A+D mirror, read current I2S LSB
DAC B (left) mirror Register	$2C	Yes	Yes	DAC B mirror, read current I2S left MSB
DAC C (right) mirror Register	$2E	Yes	Yes	DAC C mirror, read current I2S right MSB
Debug LED Control Register	$FF	No	Yes	Turns debug LEDs on and off on TBBlue implementations that have them.
Default Tilemap Attribute Register	$6C	Yes	Yes	Default tile attribute for 8-bit only maps.
Display Control 1 Register	$69	Yes	Yes	Layer2, ULA shadow, Timex $FF port
DivMMC Trap Enable 1 Register	$B2	Yes	Yes	~~DivMMC trap configuration~~
DivMMC Trap Enable 2 Register	$B4	Yes	Yes	~~DivMMC trap configuration~~
ESP WiFi GPIO Output Register	$A8	Yes	Yes	ESP WiFi GPIO Output
ESP WiFi GPIO Register	$A9	Yes	Yes	ESP WiFi GPIO Read/Write
Enhanced ULA Control Register	$43	Yes	Yes	Enables or disables Enhanced ULA interpretation of attribute values and toggles active palette.
Enhanced ULA Ink Color Mask	$42	Yes	Yes	Specifies mask to extract ink colour from attribute cell value in ULANext mode.
Enhanced ULA Palette Extension	$44	Yes	Yes	Use to set 9-bit (2-byte) colours of the Enhanced ULA palette, or to read second byte of colour.
Expansion Bus Control Register	$81	Yes	Yes	Expansion bus controls
Expansion Bus Decoding b0-7 Register	$86	Yes	Yes	When expansion bus is enabled: Internal ports decoding mask
Expansion Bus Decoding b16-23 Register	$88	Yes	Yes	When expansion bus is enabled: Internal ports decoding mask
Expansion Bus Decoding b24-31 Register	$89	Yes	Yes	When expansion bus is enabled: Internal ports decoding mask
Expansion Bus Decoding b8-15 Register	$87	Yes	Yes	When expansion bus is enabled: Internal ports decoding mask
Expansion Bus Enable Register	$80	Yes	Yes	Expansion bus enable/config
Expansion Bus I/O Propagate Register	$8A	Yes	Yes	Monitoring internal I/O or adding external keyboard
Extended Keys 0 Register	$B0	Yes	No	Read Next keyboard compound keys separately
Extended Keys 1 Register	$B1	Yes	No	Read Next keyboard compound keys separately
Global Transparency Register	$14	Yes	Yes	Sets the "transparent" colour for Layer 2, ULA and LoRes pixel data.
Internal Port Decoding b0-7 Register	$82	Yes	Yes	Enabling internal ports decoding
Internal Port Decoding b16-23 Register	$84	Yes	Yes	Enabling internal ports decoding
Internal Port Decoding b24-31 Register	$85	Yes	Yes	Enabling internal ports decoding
Internal Port Decoding b8-15 Register	$83	Yes	Yes	Enabling internal ports decoding
Keymap High Address Register	$28	Yes	Yes	PS/2 Keymap address MSB, read (pending) first byte of palette colour
Keymap High Data Register	$2A	No	Yes	High data to PS/2 Keymap (MSB of data in bit 0)
Keymap Low Address Register	$29	No	Yes	PS/2 Keymap address LSB.
Keymap Low Data Register	$2B	No	Yes	Low eight LSBs of PS/2 Keymap data.
Layer 2 Control Register	$70	Yes	Yes	Layer 2 resolution, palette offset
Layer 2 RAM Page Register	$12	Yes	Yes	Sets the bank number where Layer 2 video memory begins.