Flash Download Commands

Read EEROM switches

Returns the settings of the EEROM switches. This command is used to verify that the EEROM switches are set correctly. The command assumes that the printer flash program memory (sectors 0, 1) have been correctly programmed. If these sectors have been erased, the printer returns NAK. The printer returns ACK, followed by switch data. The data is returned in the following form:

ACK, d1, d2, d3, d4

Hexadecimal

Decimal

ASCII

1D 0B

29 11

GS VT

Not all switch packs may apply to a specific emulation. However, the printer always returns data equivalent to four switch packs. Each switch pack is considered to have eight switches and the correspondence between the data bits (di) and switches is as follows:

di (i = 1, 2, 3, 4)

Bit

Internal Switch Pack

di

0

Switch 1

 

 

 

di

1

Switch 2

 

 

 

di

2

Switch 3

 

 

 

di

3

Switch 4

 

 

 

di

4

Switch 5

 

 

 

di

5

Switch 6

 

 

 

di

6

Switch 7

 

 

 

di

7

Switch 8

3255 4073–002

10–7

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Unisys EFP9800 manual Flash Download Commands Read Eerom switches, Gs Vt