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ZX-HD

The

HD

MI

int

erfa

ce

for the ZX Spectrum

Wit

h 64

colo

r

ULAplus

TM

support!

Manual

ZX-HD firmware v1.3

Read this manual before using the

ZX-HD

interface!

Manufactured by Ben Versteeg

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Summary of Contents for ZX-HD

Page 1: ...ZX HD The HDMI interface for the ZX Spectrum With 64 color ULAplusTM support Manual ZX HD firmware v1 3 Read this manual before using the ZX HD interface Manufactured by Ben Versteeg ...

Page 2: ...mation contained herein The ZX HD firmware is also copyright material and may not be reproduced reverse engineered translated into any language or transmitted in any form whatsoever without the prior written consent of ByteDelight The manufacturer reserves the right both to change the specifications of the ZX HD and the firmware and to revise this publication from time to time without obligation t...

Page 3: ...h if you do not get video from your ZX HD In the box The box contains ZX HD circuit boards ZX HD front shell and back plate and set of 4 screws Micro SD memory card with micro SD to SD adapter Mini HDMI to HDMI cable This printed manual Other required parts and tools A small Philips screwdriver to assemble the case A Raspberry Pi Zero with soldered 2x20 pin male pin header block A soldering iron t...

Page 4: ...terlacing of two screen pages When the ZX HD detects that screen pages change with every of 4 consecutive screen updates it automatically switches to Interlaced Mode If no screen page change is detected during four consecutive updates it will switch back to normal mode In the ZX HD Interlaced Mode the number of displayed screen lines is doubled hence the resolution of the HDMI framebuffer is doubl...

Page 5: ... Zero at the side shown in the photo underneath Carefully check all soldering contacts before assembling the Raspberry Pi on to the ZX HD 2 Mounting the top circuit board to the lower circuit board The ZX HD consists of 2 circuit boards to make it possible to ship the interface in a letterbox instead of a package which would be a lot more expensive to ship Top circuit board with ZX HD text Lower c...

Page 6: ...r completely 3 Mount the Raspberry Pi Zero Now mount the pin header of the Raspberry Pi onto the female header on the top part 4 Insert circuit boards into case Slide the completed circuit boards into the ZX HD case 5 Close the case and insert SD card Mount the back plate with the 4 included screws and insert the SD card as shown on the photo ...

Page 7: ...tarting up the system with ZX HD Always first power on your TV before powering up your ZX Spectrum the ZX HD negotiates the HDMI output resolution with the TV Next you can power up your ZX Spectrum which should result in this boot screen in a few seconds At the top of the screen you see information about the automatically detected speed of your ZX Spectrum which the ZX HD calibrated itself to and ...

Page 8: ...oot up your ZX Spectrum with ZX HD and check the ZX HD boot screen At zx hd bytedelight com you can find the latest firmware version for the firmware on the micro SD card including upgrade instructions The CPLD firmware The CPLD firmware won t change quickly It s not possible to upgrade the CPLD firmware without additional programming hardware ByteDelight offers a CPLD firmware upgrade service in ...

Page 9: ...adding one or more of the below configuration sets to the config txt file on the micro SD card of the ZX HD Try one set at a time and a combine them only if there is no result Set 1 try to boot with maximum HDMI compatibility hdmi_safe 1 Set 2 ignore EDID display data if your display doesn t have an accurate EDID hdmi_ignore_edid 0xa5000080 Set 3 force output resolution hdmi_group 1 and only one o...

Page 10: ...age ULAplus ports ULAplus register port BF3B 48955 ULAplus palette port FF3B 65339 Enabling ULAplus OUT 48955 64 OUT 65339 1 With no palette set this will result in a black screen Disabling ULAplus OUT 48955 64 OUT 65339 0 Setting the 64 palette values OUT 48955 palette number 0 63 OUT 65339 palette value 0 255 Find software with ULAplus colours You can find a lot of software that takes advantage ...

Page 11: ...reat and well known products at zxspectrum shop ZX AY Simple but useful stereo sound interface for any ZX Spectrum The Harlequin kit Complete ZX Spectrum DIY kit without original ULA but with parts that can be currently obtained at electronics stores ...

Page 12: ... modern mouse to your ZX Spectrum and play dozens of supported titles Joystick adapter tester Connect a standard Atari compatible joystick to your ZX Spectrum 2 2A 3 and be able to test your joysticks Speccy Breadboard Experiment with hardware on your ZX Spectrum with this starter kit The Dual Floppy drive set Relive the nostalgia of the floppy disk era to use with appropriate floppy disk interfac...

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