MTXPlus+ Design Data - Datasheets etc.
This page hosts copies of the manufacturer's datasheets and
technical manuals the components used in MTXPlus+
MSX
Documentation
The video board design is based on the use of the
Yamaha V9958, used in the MSX2+ and MSX TurboR computers. The
MTXPlus+ video board is very close to the design of the Panasonic
TurboR FS-A1GT, modified to use a Sony CXA1645P and also expanded to
include "analogue" only RGB output circuits.
I relied heavily on the MSX Service Manuals posted
on Hans
Otten's great MSX site, the most relevant ones are also
available for download from here. |
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RGB Encoders
A number of MSX2 machines used a Sony RGB encoder to
generate component video from the V9938 RGB signals. |
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Datasheet for the Sony CXA1145P RGB Encoder used in MSX2+ & TurboR
machines having V9958 VDPs. The datasheet is predominantly in
Kanji, but the pin-out and typical
NTSC and PAL circuits are readable. |
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An English datasheet for an
Erso ES71145, a clone of the CXA1145 |
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Datasheet for a Sony CXA1645P,
a later version of the CXA1145P |
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What appears to be a later datasheet for the
CXA1645P, the document number is the same, but the component values
used in the SYNC and SC filters are different (reversed), this is
the datasheet that I used for the MTXPlus+ video board design. |
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Integrated Circuit pin-outs |
CPU Z84C0020 |
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SRAM HM628128 |
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EEPROM W27C512 |
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VDP V9958 |
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