Hardware manual

Conventions
If not otherwise specified, addresses are written in hexadecimal notation
and identified by a leading dollar sign ("$").
Signal names preceded by a slash ("/"), indicate that this signal is either
active low or that this signal becomes active with the trailing edge.
b bit
B byte
K kilo, means the factor 400 in hex (1024decimal)
M mega, the multiplication with 100 000 in hex (1 048576 decimal)
MHz 1 000 000 Hertz
Board-specific abbreviations:
EUROCOM-27 Conventions
Hardware Manual XI
ASR Address Substitution Register
AUI Attachment Unit Interface
BLT Block Transfer
BTO Bus Time-out
CAS2 Compare and Swap 2 Instruction
CLUT Color Look-up Table
CPU Central Processing Unit
CPU2CON Secondary CPU Control Register
CSR Control/Status Register
CTS Clear to Send
DAC Digital to Analog Converter
DMA Direct Memory Access
DTE Data Terminal Equipment
ESR Enable Slave Register
FIFO First In First Out
IACK Interrupt Acknowledge
ICF Interprocessor Communication Facility
ICGS Interprocessor Communication Global Switches
ICMS Interprocessor Communication Module Switches
ILACC Integrated Local Area Communications Controller
IOC-2 I/O Controller Asic
LAN Local Area Network
LEB Local Extension Bus
LIRQ Local Interrupt Request
MAU Medium Attachment Unit
MBAR Memory Base Address Register