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STATUS PORT
The status port is interrogated by version 2.0 (or later) HDOS as well as by Heath CP/M.
This can be used to determine the system configuration upon bootup without requiring
any user interaction. Some user programs may also interrogate the status port.
Refer to Pictorial 2-2 for the following steps.
NOTE: The sections of switch SWl are grouped as shown by the letters on the Pictorial.
These groups are defined as follows:
SWITCH SETTING DESCRIPTION
00*
01
10
. 11
00**
01
10
11
( 0
I 1
1
0
1
I 0
| 1
(
0
1
NOTE: Press either the GO key or the 1 key on the Computer's front panel to boot from the
drive indicated by the setting of switch section 4 (the primary boot device). Press the 2
key to boot from the device that is not selected by switch section 4 (the secondary boot
device).
•Right column is switch 0.
••Right column is switch 2.
Port 174(7CH)/177Q(7FH) has an H17 type disk (normal)
Port 174/177Q has an H47 type disk
Undefined
Undefined
Port 170(78H)/l73Q(7BH) is not in use (normal without H47)
Port 170/173Q has an H47 (normal with H47)
Undefined
Undefined
Boots from device at port 174/177Q (H17, normal)
Boots from device at port 170/173Q (H47)
Performs memory test upon boot up (not currently supported)
Does not perform memory test (normal)
Sets Console to 9600 baud (normal)
Sets Console to 19,200 baud (not currently supported)
Normal boot (normal)
Auto boot on power up or reset (not recommended)
______
SWl
PICTORIAL 2-2
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