9.1.6 Using the Extended Control Page

With UTS emulation, you can transfer files using the Extended Control Page. The file transfer protocol has no effect on these types of file transfers. The Extended Control Page includes the standard two-line Control Page, as well as additional data entry areas for configuring and performing file transfers. When the host sends data or downloads a file to the PC, the host can also update the Extended Control Page. UTS does not support the CMD options.

Sending Files

You can send a file to the host in two modes:

  • Line mode--each record of the file is transferred to the host in a separate transmission. Use line mode when the host can accept only single record transmissions. Most line editors and the MAPPER Tape Cassette (TCS) utility use this mode.

  • Block mode-- the file is transferred to the host in blocks. Each block can contain multiple records, each separated with a record separator. The size of each block is limited to the size of the screen. For example, if the screen is configured to be 24 rows and 80 columns, the maximum block size is 1920 characters. Use block mode when the host can recognize the record separators and reconstruct the file to the proper format. Most host-controlled file transfer programs use block mode since the larger block sizes reduces the number of transmissions and overall transfer time.

Receiving Files

You can receive files from the host in two modes:

  • Record mode--each string of data delimited by record separators is saved to the file as one record regardless of its appearance on the screen, and all text in every received block will be saved to the file. Screen mode--the PC can receive blocks containing multiple records without host record separators (SOEs). The screen formatting delimits records at one record per line as the data appears on the screen, starting from the last host record separator in the received block, up to the end of the block. This mode is useful for downloading MAPPER RIDs or print files that contain no SOE characters