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1 | ------------------------------------------------------------------------------- |
2 | KC 85/4 Z80-based computer, OS main loop trace | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is a set of example captures of the Z80 CPU operation of the KC 85/4 | |
6 | by VEB Mikroelektronik Wilhelm-Pieck Mühlhausen. | |
7 | ||
8 | Details: http://www.mpm-kc85.de/ | |
9 | ||
10 | ||
11 | Logic analyzer setup | |
12 | -------------------- | |
13 | ||
14 | The logic analyzer used was a SysClk LWLA 1034: | |
15 | ||
16 | Probe Signal | |
17 | ------------------ | |
18 | CH1 CLK | |
19 | CH2 /M1 | |
20 | CH3 /INT | |
21 | CH4 MEI | |
22 | CH5 /WAIT | |
23 | CH6 IEI | |
24 | CH7..CH22 A0..A15 | |
25 | CH23 /IORQ | |
26 | CH24 /MREQ | |
27 | CH25 /RD | |
28 | CH26 /WR | |
29 | CH27..CH34 D0..D7 | |
30 | ||
31 | ||
32 | Data | |
33 | ---- | |
34 | ||
35 | Contains two samples, one captured asynchronously at 20 MHz, and another | |
36 | captured synchronously on the falling edge of the Z80 CPU clock. | |
37 | ||
38 | The sigrok command lines used were: | |
39 | ||
40 | sigrok-cli -d sysclk-lwla \ | |
41 | -c samplerate=20M \ | |
42 | -p CH1=CLK,CH2=/M1,CH3=/INT,CH4=MEI,CH5=/WAIT,CH6=IEI,\ | |
43 | CH7=A0,CH8=A1,CH9=A2,CH10=A3,CH11=A4,CH12=A5,CH13=A6,CH14=A7,\ | |
44 | CH15=A8,CH16=A9,CH17=A10,CH18=A11,CH19=A12,CH20=A13,CH21=A14,CH22=A15,\ | |
45 | CH23=/IORQ,CH24=/MREQ,CH25=/RD,CH26=/WR,\ | |
46 | CH27=D0,CH28=D1,CH29=D2,CH30=D3,CH31=D4,CH32=D5,CH33=D6,CH34=D7 \ | |
47 | -o kc85-20mhz.sr --samples 5000 | |
48 | ||
49 | sigrok-cli -d sysclk-lwla \ | |
50 | -c samplerate=1M:external_clock=true:clock_edge=f \ | |
51 | -p CH1=CLK,CH2=/M1,CH3=/INT,CH4=MEI,CH5=/WAIT,CH6=IEI,\ | |
52 | CH7=A0,CH8=A1,CH9=A2,CH10=A3,CH11=A4,CH12=A5,CH13=A6,CH14=A7,\ | |
53 | CH15=A8,CH16=A9,CH17=A10,CH18=A11,CH19=A12,CH20=A13,CH21=A14,CH22=A15,\ | |
54 | CH23=/IORQ,CH24=/MREQ,CH25=/RD,CH26=/WR,\ | |
55 | CH27=D0,CH28=D1,CH29=D2,CH30=D3,CH31=D4,CH32=D5,CH33=D6,CH34=D7 \ | |
56 | -o kc85-cpuclk.sr --samples 5000 |