Tandy 1000 HX Technical Reference Manual page 260

TIMING DIAGRAMS
CLOCK PARAMETER
tHI Level at least 4.0v
tLOW Level not greater than 0.4v
tR Rise time , 0.4 to 4.0v
tF fal1 time , 4.0 to 0.4v
tCYC
7.IS MHZ
min typ max
44 (69.5-tR-tF)
68 69.5
8
7
140
4.77MHZ
min typ max
1 69 69.5 ns
1 118 (140-tR-tF) ns
1 10 ns
1 10 ns
1 210 ns
FIGURE 1. CPUCLK
FIGURE 2. RESET
RESET PARAMETERS
tl RSTIN Setup to CPUCLK low
t2 RESET Delay from CPUCLX low
1 Asynchronous Input
1 40 ns max