Alpha Microsystems AM-6060 Service Manual download pdf (Page 5)

LEVEL7 Non-Maskable Interrupt Debugger Page 5

Rev. B02

Display Memory Modules

This option lets you display memory module information in system memory, user memory, or starting

from a selected address. LEVEL7 asks for the area you want to display. It then lists memory modules

one page at a time. If any of the stacked address registers contain a value within the listed module they

are displayed to the right of the screen. To exit prior to the end of the modules, press

CTRL

/C.

Display Shared Memory (SMEM)

This option displays the shared memory area set up by the SMEM command. If any of the stacked

address registers contain a value within the listed area they are displayed to the right. If any JCBs are

located within the listed area the job name is displayed.

680x0 Disassembler

This option lets you see a disassembled listing of code anywhere in memory. You select the starting

disassembly address. By default, it begins disassembling 20 hex bytes prior to the stack program

counter. A page of disassembled instructions will then be displayed. When you’re done, press

CTRL

to return to the Main Menu. You can use these keys with this function:

A Display stacked address registers

D Display stacked data registers

SPACE

Display another page

RETURN

Display another line

Identify an Address

This option lets you enter an address and attempts to identify its location. It can identify I/O, non-

existent memory, modules, and other areas. This function will be enhanced as methods are perfected to

identify more hard-to-map areas within AMOS.

CREATING LEVEL7 OVERLAYS

To allow examination of data not originally anticipated in the creation of LEVEL7, you may write your

own overlays which LEVEL7 can load and add to its menu when the system boots. Remember, these

routines will run at interrupt level and have no AMOS functions available to them.

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Alpha Microsystems AM-6060 Service Manual Page 5