SYSTEM TECHNICAL MANUAL
HARDWARE DESCRIPTION
In the graphics mode the characteristics are:
• Each dot position in any of the eight colors
• No attributes
16-BIT PROCESSOR
•
The 16-bit processor can be installed in an NCR DECISION
MATE V, allowing the computer to function as either an 8- or
a 16-bit processor.
The 16-bit processor is availabe in two versions; both versions
function identically. The two versions are:
• A factory-installed feature (F230), or an engineer-installed
kit (K230); the board is connected to the solder side of the
controller board at P/J7A. This version is not installable by the
user.
• A self-contained module (K231) which the user can plug di
rectly into the controller bus at slot 7.
The configuration of the 16-bit processor board is:
• 8088 processor with 5 MHz clock
• Bus controller
• 4K x 8 PROM
• Spare socket for a co-processor (e.g. 8087)
• Switch logic for dual processor concept
Because the Z80A and the 8088 processor use the same bus,
only one processor will work at a time. The other processor is
in HOLD state. Both processors have equal rights and will perform
all memory and I/O operations.
Only the operating processor can perform switching to the
other processor.
The 16-bit processor operates in maximum mode.
Contents of the PROM:
Address range FF000-FFFFF
Start address after Reset FFFFO
Jump to start point of the operating system
Jump to start point of the operating system Level 0 diagnostic
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