9600 Service Manual - gmecorp-usa.com

18 C-Arm Software
HOT-BYTE INFORMATION
The “Hot-Byte” is a byte of data located at address 0000 in the EEPROM.DAT file in
generator software. Depending on the status of the Hot-Byte, the direction of data
transfer between EEPROM U58 and the SRAM card, both on the Technique Processor,
will change as shown in Figures 1 and 2.
Hot-Byte Not Set = (0) 5A at address 0000 in EEPROM.DAT file
Hot-Byte Set = (1) A5 at address 0000 in EEPROM.DAT file
Hot-Byte Not Set (0)
Under normal operating conditions the Hot-Byte is set at 0 (5A and information such as
that for the Event file is written into EEPROM U58 on the Technique Processor as the
events occur. At the next boot-up of the system, this information is written from U58 to
the corresponding file on the SRAM card as shown in the first case in Figure 1.
If the EEPROM is blank (as shown in the second case in Figure 1), this will be sensed
by software during boot-up and the information contained in the EEPROM.DAT file on
the SRAM card is written to EEPROM U58.
Figure 1 - Data Transfer with Hot-Byte Set at 0