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FRAM71B
11.3.2
Using a HEX Dump and a Serial Interface
Prerequisites:
· New OS as HEX dump on a PC ("source"), target HP-71B ("target"), FRAM71B. Format
of HEX dump must be 2048 lines of 64 characters.
· HP82401A HP-IL Interface
· Either a working serial connection to the PC via 82164A HP-IL/RS-232 interface, or a
USB connection via Jean-Francois Garnier's PILBOX.
· A Terminal program that allows for data transfer between PC and HP-71B.
Preparations:
· On FRAM71B, remove J1 and install CN2-4.
· On target, install FRAM71B.
On the target, key in the following download program:
10 ! SERTOSYS SERIAL TO SYS
20 DIM A$[64]
30 INPUT "SYSWRT ENABLED? Y/N";V$ @ IF V$="N" THEN GOTO 20
40 DISP "START *.DMP UPLOAD"
50 S$="00000"
60 E$="1FFFF"
70 S=HTD(S$)
80 E=HTD(E$)
90 FOR I=S TO E STEP 64
100 ENTER :2 ;A$ @ IF I=S+64 THEN DISP "WRITING..." !:2 = 82164A
110 I$=DTH$(I)
120 POKE I$,A$
130 ! PRINT I$;": ";A$
140 NEXT I
150 DISP "DONE" @ BEEP
160 END
On the source, start uploading of the HEX dump to the target. On the target, run the down-
load program. After the program has finished, Power-down the target. On FRAM71B, secure
the SYSRAM area against accidential overwrites by removing jumper CN2-4. Install J1 and set
up Port #1 on your HP-71B as per chapter 10.2 "Using the SYSRAM Feature". Powering-on
the target and executing [VER$] shows the new OS version on the target machine.
FRAM71B 1.00
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User's Manual
©Hans Brueggemann, 2016
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