34430Re: [midatlanticretro] MARCH's 11/44
- Feb 16, 2014On 02/16/2014 11:16 PM, Evan Koblentz wrote:
>>> Humor me. What are the possible commands (and what do they do / what doYeah. When you're at the ">>>" prompt, you're interacting with
>>> they return) in firmware mode?
>> In this manual:
>> ...see section 2.2, "Console Commands", starting on page 2-4. (PDF
>> page 33). It's a simple pseudo-front-panel monitor program...you can
>> deposit data into memory, examine data in memory, execute from a
>> specified address, execute a bootstrap for a particular device, etc.
>> Note that all numbers (in all of PDP-11 land, not just here) are in
>> octal notation.
> I see your point. Even the self-test looks pretty dull.
firmware running on an 8085 that has direct access to parts of the
PDP-11/44's internal CPU bus, as well as the Unibus. That 8085 has 4KB
of ROM and 256 bytes of RAM, on a very crowded board, and with all the
bus control stuff going on, they'd have been hard-pressed to get much
more functionality out of that.
Dave McGuire, AK4HZ
New Kensington, PA
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