Advertisement
Quick Links
Toshiba HX-MU900 Music Module Expander Version 2
256 kB Sample RAM, MSX-Audio Basic, original software
Original by: Bas Kornalijnslijper
Edited by: Bart Hamer
Warning:
The most important part in the Music Module is the printed circuit board (PCB). Parts can be replaced, but
not the PCB. Do not try to unsolder the parts, but cut them loose and then remove the solder pins. The use
of IC sockets is recommended.
Background:
Back in 2005 Brazilian MSX users Fábio Ricardo Schmidlin (FRS) and Luciano Sturaro (MSXPró) released an
expander PCB for the Philips Music Module. This board came with an adjusted Panasonic MSX-Audio ROM
and with 256KB sample memory. A while ago FRS published his schematics so other MSX users could
recreate his upgrade PCB. The First Toshiba Music Module Expander is based on a modified Philips Music
Module Expander. This Second version was the idea of Repair Bas and designed by Alexey Wierzbowsky
(RBSC). This version is much easier and faster to install. We would thank FRS and MSXpró for their great
work. We hope you have great fun with this upgrade.
Upgrade package contents:
Completely pre-assembled expansion board with 256 kB Sample RAM
-
-
EPROM containing MSX-Audio Basic and adjusted original software
SRAM memory chip (SRM2264C)
-
-
74LS139
47 µF capacitor
-
-
100 nF capacitor
Wire
-
Advertisement
Related Manuals for Toshiba HX-MU900
Summary of Contents for Toshiba HX-MU900
- Page 1 256KB sample memory. A while ago FRS published his schematics so other MSX users could recreate his upgrade PCB. The First Toshiba Music Module Expander is based on a modified Philips Music Module Expander. This Second version was the idea of Repair Bas and designed by Alexey Wierzbowsky (RBSC).
- Page 2 Standard Toshiba HX-MU900 PCB.
- Page 3 The contents of the upgrade package.
- Page 4 Remove the solder tin from the pin holes at the empty place of IC6. Remove the solder tin from the pin holes at the empty place of C21. Remove wire bridge J2. Remove wire bridge J8. Toshiba HX-MU900 PCB prepared for installation of the expansion PCB.
- Page 5 Installation (upper side PCB): Shorten pin 1 of the new EPROM. Place the new EPROM with the remaining pins in the empty IC socket (IC2). Place the SRAM memory chip (SRM2264C) in the empty place of IC3. 74LS139, shorten pins 1, 2, 3, 13, 14 and 15. Place the 74LS139 with the remaining pins in the empty place of IC6.
- Page 6 Installation of expansion board with 256 kB Sample RAM: Solder the Y8950 onto the expander PCB. Connect the orange wire from the Expander PCB to pin 3 of IC8 (74LS08). Connect the yellow wire from the Expander PCB to pin 4 of IC8 (74LS08). Insert the Expander PCB in the empty socket of IC1.
Need help?
Do you have a question about the HX-MU900 and is the answer not in the manual?
Questions and answers