Superfo Harlequin 128K
Pulsa aquí para ir a la
versión en Español.
Introduction
Derived from
Superfo Harlequin clone project , Superfo has made a version with
new features:
- 32K ROM
- 128K RAM
- Sound chip AY-3-8912
- Kempston joystick port
- PCB still has the same ZX spectrum 48K dimensions
Important Note :
This Superfo Harlequin 128K version it is not
exactly a Spectrum +128K. Timing , the number of lines per frame and
the number of pixels per line are the same as Harlequin 48K (or
Spectrum 48K). Briefly we can say that the current version is a
Spectrum 48K with 128K RAM, sound chip and uses a Spectrum + 128K ROM.
It is possible have a more accuracy Spectrum +128K
clon doing some modifications designed by Superfo. These modifications
require cutting tracks and add some more components.
Superfo Harlequin 128K scheme
Note : Superfo recommended to use a good DC-DC
converter to avoid small screen interferences produced by typical noise
of these type of regulators.
Superfo Harlequin 128K PCB
This photo shows the board inside a Spectrum 48K
case. You also can see the RESET button and the joystick port.
Another difference with Harlequin 48K or Spectrum
48K is EAR and MIC connector. In Harlequin 128K , MIC connector is used
for
stereo output sound and EAR connector is use for EAR and MIC signal (It
uses stereo jack 3,5" connector).
Documentation
Harlequin
128K Rev 1B (Older).
Harlequin
128K Rev 2B.
Harlequin
128K Rev 2D (newer).
Spectrum +128K modifications. To have a more accuracy Spectrum+128K
clone. Tested in a rev 1B board.
Thanks to
Superfo. He made this proyect and give his work for
free for hobby builder.
2016-2018 José Leandro Novellón Martínez