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PPS>HELP TYPE
TYPE
ITJ-YPE [«PJ-ROH device>]
The TYPE command is required prior to executing any command which interfaces
with the memory device in the PROM programmer- It specifies the type of device
which is to be programmed- If the command is entered without the arguments the
user ispromptedtoenteroneof the allowable PROh types f or the Personality
Module currently installed- If the selected PROH is larger than 4K then a
virtualbufferiscreatedontheworkfilespecifiedbytheuser-If the
workf ile is not specified the user is prompted for the same-
PPS>
Comments
In this example, a description of the TY E command is requested. The HEL command is
particularly useful in determining the correct syntax for an entry.
Interleaving a File Between Two PROMs
It is often desirable to have code or data arranged into 16-bit words and stored on a pair of
ROMs. This is the case, for example, when working with an 8086 microprocessor that reads
to and writes from memory on a 16-bit data bus. The data is interleaved between the two
ROMs, the even (or low) bytes stored in one ROM and the odd (or high) bytes stored in the
other ROM. The FORMAT command handles this interleaving automatically.
In the following example, a file written in Intel 8086 hexadecimal format is interleaved into two
ROM devices. (Read the description of the FORMAT command in the HJP-200AJ201A Un
versal Programmer User ' s Gu de to familiarize yourself with the terminology of the command
before doing this example.)
Example Programming Session
4-5
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