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This chapter describes universal programmer off-line operation and the iUP-201 A
function keys. Off-line operation is available only on the iUP-201 A model.
General Off-line Functioning
The iUP-201 A universal programmer has a keyboard and an alphanumeric display
for off-line operation. Internally, the iUP-201 A universal programmer contains
32K of RAM. This RAM buffer is the URAM logical device that the iPPS software
communicates with during on-line operation. Note that for PROMs greater than
32K bytes, URAM is used for off-line editing and cannot upload programs to the
iPPS software.
In addition, the iUP-201 A local firmware lets the universal programmer down-load
data in Intel 8080 hexadecimal format into the RAM buffer (using an RS-232
interface) from any host system. This down-load operation does not use the iPPS
software.
Only two storage devices are accessible during off-line operation: PROM and
RAM. Off-line operations with these devices often consist of copying the data
from a master PROM into the off-line RAM device, then programming the data
back into a blank PROM. For example, the following off-line steps illustrate how
to copy a master PROM that has less than 32K bytes.
1. Switch the iUP-201 A universal programmer to off-line mode.
2. Insert the PROM to be copied.
3. Select the appropriate PROM type if required.
4. Press the ROM TO RAM switch to copy the PROM data into the RAM.
5. Remove the PROM that was copied.
6. Insert a blank PROM of the proper type.
7. Press the PROG switch to program the RAM data into the new PROM.
You can make additional copies of the original PROM by repeating steps 6 and 7.
The iUP-201 A universal programmer also lets you modify data in the RAM on a
byte-by-byte basis or fill a selected address range with a constant.
The off-line operation of the iUP-201 A universal programmer requires all data
transfers between the PROM device and the RAM to include the whole range of
PROM device addresses. You can partially program a PROM in off-line mode by
filling the addresses in RAM that do not contain valid data with a constant equal to
the blank state of the PROM.
Internal Memory
This chapter refers to the 32K of universal programmer memory as RAM. This
CHAPTER 3
OFF-LINE OPERATION
3-1
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