Lexicon MPX-1 User Manual

COMMAND DESCRIPTIONS
HOP - No Operation
OPCODE BIT CODING:
Bit 0
Bit 7
CONT I INT
o o o o o
Bit 0
1
PARAMETERS PASSED: None.
PARAMETERS RETURNED: None.
DESCRIPTION: This comma:J resets the MPX-l to its initial starting state. The
internal command table will be cleared (so any custom commands you have loaded
into RAM will now be ignored). The address where the MPX picks up its first
command line will be set to SOH. All interrupts will be masked and the inter-
rupt controller will be re-initialized.
SET MASK - Mask or Unmask interrupt inputs to MPX-l
OPCODE BIT CODING:
Bit 7
CONT lINT o
o o
o
1
Bit 0
o
PARAMETERS PASSED: Mask Byte. Link Address.
PARAMETERS RETURNED: None.
DESCRIPTION:
lfhis command is used to mask or unmask interrupt inputs to the
MPX-l. The byte passed in Parameter Byte 0 is written to the mask register of
the 82S9A interrupt controller. If a bit in the mask byte is set to one, the
corresponding interrupt will be masked. Conversely, if a bit is zero, that
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Lexicon MPX-1 Specifications

General

Brand	Lexicon
Model	MPX-1
Category	Recording Equipment
Language	English