The program will disassemble any Z-80 or 8080 object program
and reconstruct a TDL assembly format compatible source file
on the console or disk. The object file resides in memory at
any location up to the starting address of the disassembler.
Binary files may be loaded at any time and utilities are
provided to manipulate and examine loaded files. Disassembly
may be effected in multi-segment passes, with each segment
starting at any location and ending at any location within
the range 0000-ORIGIN. The latter may or may not be the
execution locations of the object program. For each
segment/pass, run-time options may be specified as follows:
[a] Use the symbol table for the label
field and address field (see option g)
[b] Do not initialize the symbol table
nor the disk source file (see option i
for exception). Use this option to
append entries to the symbol table and
new lines to the disk file.
[c] Build symbol table using the Lxxxx
format for extended reference
instructions. (see options a and g for
execptions)
[d] Generate labels Lxxxx instead of the
default HEX values xxxxH.
[e] Generate ASCII characters in quotes
depending on option f. If option f is
true, all printable ASCII characters
will be placed in quotes following the
.Byte pseudo opcode. If option f is
false, all two operand instructions with
data will be followed as a comment by
the quoted ASCII character corresponding
to the data.
[f] Generate .BYTE pseudo opcode instead
of default assembly code. Use this
option for proper disassembly of
segments consisting of tables and ASCII
strings.
[g] Normally the operands of LXI instr.
are treated as 2 byte data rather than
as an address. Use this option to over
ride this default. If this option is
selected, the 2 byte operand of LXI
instructions will be used to build the
symbol table and if already there, the
symbol entries will be used in place of
the default HEX format.
[h] Write/Build a reconstructed SOURCE
FILE in disk and in a compatible format
ready for re-assembly by the TDL MACRO
RELOCATING ASSEMBLER. If the source file
is new, you will be prompted for the
filename.
[i] Restart the disk file regardless of
option b. Use this option to over ride
the APPEND mode without affect on the
specified action on the symbol table.
[j] Close the source file at the normal
termination of this segment/pass.
[k] Suppress console output. Use this
option during symbol table building
pasess to expedite disassembly.
ALL OPTION ARE SELECTED WITH THE 'O' COMMAND. ALL OPTIONS
ARE INITIALIZED OFF. EACH TIME THE 'O' COMMAND IS USED, ALL
DESIRED OPTIONS MUST BE SELECTED SINCE THE COMMAND RESETS
EACH OPTION.
The following describes the command mode of the
disassembler. All line editing features of CPM are
available in the command mode except Control-C. DO NOT USE
CONTROL-C TO RETURN TO CPM.
RUBOUT delete and echo the last character typed
ctl-U delete entire line
ctl-X (same as ctl-U)
ctl-R retype current line
ctl-E physical end of line
ctl-S stop the console output temporalily
D aaaa,bbbb Disassemble memory from start address aaaa to
end address bbbb
R drive:file Read a binary file into memory. All files must
have a 'COM' extension. Files are loaded at
start address 100H and the length of the file
will be displayed at the console.
O a,b,c,... Set runtime options. All options are reset
with this command and selectively set.
Q Quit session and return to CPM. The number of
current symbol table entries is displayed.
M aaaa,bbbb,cccc Move memory starting at aaaa and
ending at bbbb address cccc.
H aaaa,bbbb Hex math. The sum and difference will be
displayed.
S aaaa,bbbb Show memory in HEX.
T aaaa,bbbb Type memory in ASCII.
C Close source file. Use this command when write
errors occur or end of medium.
