177Bug Implementation
http://www.motorola.com/computer/literature
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If you have used one or more of Motorola’s other debugging packages, you
will find the CISC 177Bug very similar. Some effort has also been made
to improve the consistency of interactive commands. For example,
delimiters between commands and arguments may be commas or spaces
interchangeably.
177Bug Implementation
Physically, 177Bug is contained in two 27D4002 44-pin EPROMs
installed in sockets XU1 and XU2. The executable code is checksummed
at every power-on or reset firmware entry, and the result (which includes
a precalculated checksum contained in the memory devices) is tested for
an expected zero. Users are cautioned against modification of the memory
devices unless precautions for re-checksumming are taken.
Memory Requirements
The program portion of 177Bug is approximately 512KB of code,
consisting of download, debugger, and diagnostic packages contained
entirely in EPROM.
The 177Bug firmware executes from address $FF800000 in EPROM. The
177Bug initial stack completely changes 8KB of SRAM memory at
addresses $FFE0C000 through $FFE0DFFF, at power-up or reset.
.
The 177Bug firmware requires 2KB of NVRAM for storage of board
configuration, communication, and booting parameters. This storage area
begins at $FFFC16F8 and ends at $FFFC1EF7.
Table 3-1. Memory Offsets with 177Bug
Type of Memory Present
Default DRAM
Base Address
Default SRAM
Base Address
4/8/16/32/64MB/128MB shared DRAM (SDRAM)
with ECC protection
$00000000
$FFE00000
(onboard SRAM)
Summary of Contents for MVME177P
Page 1: ...MVME177P Single Board Computer Installation and Use V177PA IH1 Edition of October 2000 ...
Page 10: ...x ...
Page 12: ...xii ...
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Page 34: ...1 16 Computer Group Literature Center Web Site Hardware Preparation and Installation 1 ...
Page 48: ...2 14 Computer Group Literature Center Web Site Startup and Operation 2 ...
Page 92: ...C 2 Computer Group Literature Center Web Site Network Controller Data C ...
Page 98: ...D 6 Computer Group Literature Center Web Site Disk Tape Controller Data D ...
Page 108: ...Index IN 6 Computer Group Literature Center Web Site I N D E X ...