Debugging stuck bits

I've been blocked on making progress on the retro pc project due to bad reads from the ROM. The seemingly simple snippet of boot code should light an led wired to to the i/o ports (any port). section .text resb 0x7F0 org 0x7F0 start: mov al, 0x1   again: out 0x10, al jmp again When … Continue reading Debugging stuck bits

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Using Ultrascope for Rigol DS1052E

I've become more and more annoyed at having to export images from my Rigol scope to a flash drive plugged into the device. I'd much prefer to capture signals and images directly from my Macbook. Unfortunately, the PC software that comes with the Rigol -- Ultrascope -- does not run on Mac OS X. Boo. … Continue reading Using Ultrascope for Rigol DS1052E

An amateur’s look at the Rigol DS1052E

My Rigol scope showed up a couple weeks ago and I have had some time to play with it. I'm no expert on test equipment but I've been very happy with the DS1052E so far. In particular there have been several nice surprises along the way. All of the normal 2-channel scope features you'd expect … Continue reading An amateur’s look at the Rigol DS1052E