Tandy 1000 SL Technical Reference Manual page 121

023744
Reairtor Operation
-
Signals Internal Data Bus
A3 A2 A1 A0 FlbFloP DBO-DB7
Channel
CS
0 EaseandCurrentAddress Write 0 1 0 0 0 0 0 0 AO-A7
Current Address Read 0 0 1
0
0
0
0 0 AO-A7
BaseandCurrentWordCount Write 0 1 0 0 0 0 1 0 WO-W7
Current Word Count Read 0 0 1 0 0 0 1 0 WO-W7
1 BaseandCurrentAddress Write 0 1 0
0
0 1 0 0 AO-A7
Current Address Read 0 0 1 0 0 1
0
0 AO-A7
BaseandCurrentWordCount Write 0 1 0 0 0
1 1
0 WO-W7
Current Word Count Read 0 0 1 0 0 1 1 0 WO-W7
2 BaseandCurrentAddress Write 0 1 0 0 1 0 0 0 AO-A7
Current Address Read
0 0
1 0 1 0 0 0 AO-A7
BaseandCurrentWordCount Write 0 1 0 0
1
0 1 0 WO-W7
Current Word Count Read 0 0 1 0
1
0 1 0 WO-W7
3
BaseandCurrentAddress Write
0
1 0 0 1 1 0 0 AO-A7
Current Address Read 0 0 1 0
1
1 0 0 A 0 4 7
BaseandCurrentWordCount Write 0 1 0 0 1
1
1 0 WO-W7
Current Word Count Read 0 0 1 0
1
1 1 0 WO-W7
0 1 0 0 0 0 0 1 A8-Al5
0 0 1 0 0 0 0 1 A8-Al5
0 1 0
0
0 0 1 1 W8-Wl5
0 0 1
0
0 0 1 1 W8-Wl5
0
1
0 0
0 1 0 1 A8-Al5
0 0 1 0 0 1 0
1
A8-Al5
0 1
0
0 0 1 1 1 W8-Wl5
0 0 1
0
0 1
1
1
WB-Wl5
0
1 0 0 1 0 0 1 A8-Al5
0 0 1 0 1 0 0 1 A8-AI5
0 1 0 0
1
0
1 1
W8-Wl5
0
0 1 0 1 0 1 1 W8-Wl5
0 1 0
0 1
1 0
1
A8-AI5
0 0 1 0 1 1 0 I A8-AI5
0 I 0 0 1 1 1 1 W8-Wl5
0 0 1 0 1 1 1 1 W8-Wl5
Figure 7. Word Count and Address Reglster Command Cedes
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