Radio Shack TRS-80 Model II Reference Manual page 252
Disk operating system
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Also See for TRS-80 Model II:
- User manual (236 pages) ,
- Service manual (199 pages) ,
- Trsdos & disk basic reference manual (192 pages)
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Model II TRSDOS
Exit Conditions
NZ
Error occurred.
B
Status, as follows:
Bit
Meaning when set
7
Break sequence is now being received
6
Framing error in a byte now being received
5
Data overflow due to a byte now being received
4
Parity error in byte now being received
3
Modem data carrier not present
2
Transmitter busy
1
Unused
a
ClearTo Send not present
288
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