3 ms·

1. Indeed; that requires only very basic components; I would recommend a cheap digiscope + analog scope so you need even less components to have fun. The z80 is

1. Indeed; that requires only very basic components; I would recommend a cheap digiscope + analog scope so you need even less components to have fun. The z80 is so slow that you can use very cheap scopes. 2. I bought an 80s EPROM writer from a forum for E1 which I use for that; because it's so old (and slow), you can actually understand and measure what everything does.

jackhack 10y ago
+1 on the cheap scope recommendation. Without seeing your signals, solving a problem with shoving bits around is (educated) guesswork. Nothing like struggling for days with a weird fault or corrupted xmit only to throw a scope on a bus line and see in a few seconds where the problem lies. (voice of experience speaking). And here's the good part: These days, a basic scope is incredibly cheap! Check ebay and/or amazon for a DSO138. It's a simple creature but ideal for a project such as a Z80. There are two variants of the DSO138 - kit form and pre-assembled. Prices are an astounding $25/$30 respectively. Unless you just want to spend 4 hours soldering (not a bad thing), spend the extra $5 and get the prebuilt. And make sure it has the latest firmware (cleaned up some bugs, improved centering, and reduced noise). And @mindcrime - please blog that project! I know I speak for loads of others when I say I'd love to watch your progress. I never get tired of seeing others do cool stuff I don't have time for anymore. :)
- mindcrime 10y ago
  I've been eying one of those Rigol DSO's that people seem to really like. They're not crazy expensive, but get pretty good reviews. I think I'll wind up getting a standalone frequency counter as well, at some point.