Earlier I went though the ntl CR3 Bromley software which was introduced in 2002 and was the basis for ntls new interactive services.

The Pace Di4000 was a redesign of the previous 4001 and 1000/2000 series box. Its worth mentioning that Pace’s model numbers don’t seem to follow a specific scheme, you would assume the Di4001 was the successor to the Di4000, however the Di4001 was the launch box for ntl in Langely areas and was a DAVIC based box, with the Di1000/DiTV1000 being its DOCSIS equivalent for Telewest and ntl Bromley areas.

These early generation boxes were designed around the Hitachi SH3 CPU with C-Cube Chipset for MPEG2 decoding and descrambling. The Di4000 replaces that with the Broadcom demodulator and the Conexant MPEG2 decoder which contains the ARM CPU.

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Left Pace Di4001, Right Pace 2500 Sky Digibox

The main difference you will notice between the two is the reduction of components, with the Di4000 only having two main processors. The previous generation was split over 5 different processors. this reduction means the mainboard is smaller and the box produces less head as a result. In fact its not too far off an average Sky Digibox.

• The Power supply is now separated from the main board, like the Sky Digibox design, allowing for the PSU to be replaced independently from the main board.
• The audio out jacks have been removed, no you can no longer connect the box to a Hi-Fi system unless you use a scart breakout adaptor. The design for it still exists on the main board however.
• The Serial port and Printer part are removed in favor of a single USB port. the serial port still exists and can be access using a VCR to RS232 adapter.
• The second card slot has been removed, this was originally designed for Mondex cashcards.
• The remote control protocol now supports IRDA and RC5

Conexant CX22490 – ARM920 based core, 160Mhz – 175MIPS

Broadcom BCM3250KPB – Demodulator

CrystalLAN CS8900A-CQ – Ethernet controller

Conexant Bt861KRF – Video encoder for Scart/AV output

The tuner modules, one for TV and the other for data/DOCSIS modem

• Power Input
• Ethernet – For internet connectivity for the internal cable modem
• USB port – To connect additional devices, never used officially by ntl or Telewest
• IR in/Out – never used by ntl or Telewest
• Scart ports
• RF Input/Output
• Cable Input

Diag Screens

To access these on this box, hold down the Up & Down buttons whilst the STB is booting, and continue to hold them down until you see this screen. The front panel LED display will change to ldr and will then go blank once you have entered diag mode.

Sets the default frequency which is checked when the stb boots up, this frequency carries the netid for the area and any software updates

Shows build information about the software loaded, and the hardware identifier of the box.

Cable modem IP address information

RF output configuration

Shows recent PPV purchases

Shows contents of the flash memory

Signal information

With cable feed connected