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Old 07-08-2007, 09:55 PM
Grant Stockly Grant Stockly is offline
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Join Date: Jan 2005
Posts: 447
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Quote:
1) No single step operation?
No. I think this is a limitation of the 6800 processor.

Quote:
2) No deposit next / examine next operation?
Nope. There is examine/deposit, but no auto increment. I think this is also a limitation of the processor design.

With the ROM monitor you can do memory operations very efficiently over the serial port.

If you type "M", then the rom monitor will respond with a space. You then type the 4 digit hex address, "0000", and the monitor responds with a space + the data + space. You can then press enter OR enter in NEW data for that location.

If you type "N", the monitor will respond with space + [previous M or N address + 1] + data + space. You can then press enter OR enter in NEW data.

A session would look like this:

Code:
.M 0000 00 01
.N 0001 2E 02
.N 0002 78 04
.N 0003 23 08
.N 0004 12 10
.N 0005 7E 20
.N 0006 2A 40
.N 0007 4D 80
.M 0000 01
.N 0001 02
.N 0002 04
.N 0003 08
.N 0004 10
.N 0005 20
.N 0006 40
.N 0007 80
Other ROM monitor commands are J (followed by 4 hex digits) for jumping to a specific address, and L for loading motorola S Record paper tape images.

The front panel is pretty handy for debugging problems with the computer, or for "fun", but it isn't as useful as the front panel on the Altair 8800.

Its still fun to watch the LEDs!
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