glb_gtz's blog

It's all over excpt the crying

Crying .... Testing

Getting closer

It is alive

Well...mostly. Yesterday it looked like it was trying to boot. I was getting a ] at the bottom of the screen when I hit the RESET button. But the screen would not clear and the keyboard was not working. I should have cycled power and I would have gotten the screen to clear. Something about cold booting and warm booting. Today I fixed the keyboard, except for the space bar.

Close but no cigar

How slow is too slow?

In my debug of the Verilog 6502, I noticed that the code was not cycle accurate with the NMOS 6502. A lot of common instructions take an extra cycle. The means that most of the time it will be running 25% - 33% slower. For me, that is unacceptable. I have been playing with writing a cycle accurate version. It is doable, but it will take a lot longer.

Up and running

Where am I?

Well, forget everything I stated before. I seem to be changing my mind fairly regularity these days. I do not know if is because of the lack of sleep or I am being slowly changed by my wife to be more like her. If I was in marketing I would say, I have adapted in an everchanging environment as new information became known to me. Or some BS like that.

ROM

Apple - ROMs

Video done

I have not updated this blog in a couple of weeks. I have been busy at work as well as working on this project. I have pretty much finished the video section of the Apple IIE. All modes look good to the eyes. The FPGA board has switches that I am using to set the different modes.

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