Memotech Limited MTX 500, Service Manual

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2
CPU Board
Mounted in the lower chassis, the CPU board
accommodates:
Z80A CPU operating at 4Mhz.
24K of ROM which contains:
MTX BASIC - incorporating sophisticated MTX LOGO-type
graphics commands.
MTX NODDY - Interactive screen manipulation routines.
FRONT PANEL DISPLAY - incorporating Z80
Assembler/Disassembler plus Z80 Register, Memory and
Program display and manipulation routines.
VIDEO DISPLAY PROCESSOR - with 16K dedicated video-RAM.
USER-RAM - 32K on the MTX500 and 64K on the MTX512.
User RAM size is constant under all display formats.
VIDEO BOARD - for television and sound signal encoding.
REAL TIME CLOCK
CHARACTER SETS - Numeric, upper case, lower case,
user-definable characters and user-definable sprites.
Resident international character sets and appropriate
keyboard layouts for UK, USA, Finland, France, Germany,
Spain,Denmark and Sweden.
Display
Colour TV and/or Video Monitor
40 column x 24 line display as standard, with
optional Colour 80 column board. (FDX or HDX disc
based system required).
Display Facilities:
FULL SCREEN HANDLING
EIGHT USER DEFINABLE VIRTUAL SCREENS
SCREEN FORMATS
Text: 40 x 24 characters
Text with graphics: 32 x 24 text with 256 x 192
pixels in 16 colours
MTX Service Manual