Components Of The Firmware; Memory Requirements; Table 3-1. Memory Offsets With 167Bug - Motorola MVME167P Installation And Use Manual

167Bug Firmware

Components of the Firmware

3

Memory Requirements

Type of Memory Present
4/8/16/32/64MB shared DRAM (SDRAM)
with ECC protection
3-2
The 167Bug firmware is organized in the following parts:
A command-driven user-interactive software debugger. It is
referred to here as "the debugger" or "167Bug."
A set of command-driven diagnostics, referred to here as "the
diagnostics."
A user interface which accepts commands from the system
console terminal.
167Bug includes commands for display and modification of memory,
breakpoint and tracing capabilities, a powerful assembler and disassembler
useful for patching programs, and a "self-test at power-up" feature which
verifies the integrity of the board. Various 167Bug routines that handle
I/O, data conversion, and string functions are available to user programs
through the System Call handler.
The program portion of 167Bug is approximately 512KB of code,
consisting of download, debugger, and diagnostic packages contained
entirely in EPROM.
The 167Bug firmware executes from address $FF80 0000 in EPROM. The
167Bug initial stack completely changes 8KB of SRAM memory at
addresses $FFE0 C000 through $FFE0 DFFF, at power-up or reset.

Table 3-1. Memory Offsets with 167Bug

Default DRAM Default SRAM
Base Address Base Address
$0000 0000 $FFE0 0000
(onboard SRAM)
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