Advertisement
DISASSEMBLER
l~Z·I·IEl,,1•1'lill,ti
This is a disassembler for the.
80C85,
which is
. the EP-200 CPU. The functions of a disassem-
bler are indispensable for understanding programs
mact,_ine language or:for checking the internal
operation of the FP-200.
This program reads the contents of memory
- addresses specified by the
PEE.K
command and
displays the associated assembly language.
/ ---~~-- ---~.,,.,, ---,ill..--;;:;;:-s------ ·
,
/!f •
.;>;·
,.
,~,, ✓
:.>
o
l.D,:
•c~
, r. _;,,.,,- :,o
~ r,.; •
00,t:1;:l
~-,.;,~ ~--_/.;' ~Oo~
oo_
.=;
. . . ,
~
--di
k
•
o
, •
- -?
•
'
.
~,-.-~j
When·the program is started, it asks whether or not a printer is used. If you use
.a
print-
er is used. ff you use a printer, press the Y key. If not, press the N key.'
Then input the starting address and the ending address of the area to be disassembled,
in hexadecimal. If the ending address is smaller than the starting address or if a-non-
existent.address_js input, the program prompts for re-input of data;
_.
.
_ _
When a ·printecis used, the program continuously outputs all the addres~s from. die
- . -.~!ac~ing,~d~d-~~~-s,',to Jhe;:;,~ndjng ,~ddr,es_~l,~-l~,~,mac_tlirieAanguage,;(h~~ct~~im~!!-9t~W>I1f,;;.:;,
;···."-~::;ft~$~~;~~~ffs~da~~e~~;s~~~~~J~~-•~J~as~rn~1~~-~~onteh~~":1ifl~Jri~~~~~~~~~l,i~~;~~::r~
When no printer
is
~sed, th~;;~i;;m di~plays th·e con(e~ts at a r~t~ ofthiJ; iie,,.;s·~~r:·_
screen. To display the riexf three items;- press any key on the keyboard. Repeat _t_his ·
operation to display ~all the contents to the ending address.
At the end of disassembly, the program again prompts for input ofthe starting address
and the ending add_ress of another area to be disassembled.1.o terminate the program,
press the BREAK key.
In this disassembler, when a printer is used, one line of blank space
is"
provided after
each
J
MP
or RET coh,mand. This is to facilitate identifying the point where the pro-
gram flow is changed.
If the address does not contain any command, the result of disassembling is output as
follows:
address•
memoric
operand
Output format
Advertisement
