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ADV - Articles & Misc
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Manual for ProDev DDT8_DDT16
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DDT.MANUAL.bxy
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DDT.Manual
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CHAPTER.3
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AppleWorks Document
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1993-08-05
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6KB
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119 lines
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/printer interface and serial cards should work.rotocol
CHAPTER 3
SETUP COMMANDS
M or ? - MENU
EEntering the command "M" or "?" will produce a list of the available K
Icommands. You will find this very convenient and after you have used the I
GProDev DDT for a while it may not be necessary to refer to the manual. J
HThe menu listing indicates the way in which the command must be entered 0
and a brief reminder of what the command does.
MO - MODE
The MODE command allows you to change some of the DDT's settings.
Example:
--- Mode of Operation ---
Text screen save
1=on 2=off
Enter <1> :
1=6502 2=65C02 3=65816
Enter <2> :
I/O slot #
1:out 2:in/out 3:normal
Enter <3> :
Text screen save
JIf you are not concerned about overwriting the text RAM area you can turn I
Gthe screen save off by entering a "2". This will eliminate the strange K
Iscreen updating that occurs when tracing code. When this mode is on, the L
Jcontents of the text RAM area are preserved by exchanging the contents of E
the screen memory with a buffer in the ProDev DDT's own RAM memory.
FIf you are sending the ProDev DDT's output to a device other than the /
main screen the screen save should remain on.
BIf the target program is using the text RAM area for data or code E
Cstorage, the screen save must be on to prevent the ProDev DDT from K
Ioverwriting the text RAM area. With the mode on, it is possible to trace )
code that resides in the text RAM area.
IEnter 1,2 or 3 to select the type of CPU that your code was written for. D
BYour selection is used by the DDT so the proper mnemonics will be G
displayed during disassembly or accepted by the DDT's mini-assembler.
(DDT8) .
** See the note in Appendix B about 65802 **I
GOf course, selecting the 65C02 or 65802 will not allow you to trace or F
Drun the extra instructions provided by these processors unless your
computer is so equipped.
I/O slot #
Select the Input/Output slot of the DDT.
JSlot 3 uses the Apple's keyboard and screen for input and output with the
ProDev DDT.
ESlot 2 redirects both input and output to slot
2. This option allows I
Gcontrolling the ProDev DDT from a remote terminal. The output from the F
DProDev DDT will be sent to the terminal screen and the input to the G
EProDev DDT will be entered on the terminal's keyboard. The input and E
Coutput of the target's program is not changed. With this method of D
Bdebugging, it is possible to observe the output from the target's I
Gprogram, be it text or graphics, and the output from the ProDev DDT at 1
the same time. See Chp. 8 for more information.
CSlot 1 directs the ProDev DDT's output to slot 1. Input is via the J
HApple's keyboard. This option is intended for generating a hard copy of H
Fyour work or for users who do not have access to a terminal but would J
Hstill like to trace programs and view their programs output at the same F
Dtime. Be sure your printer is ready and on line before issuing this +
command. See Chp. 8 for more information.
esc - : LEVEL
FThe "escape" key, is used to return to the ProDev DDT's command level #
from various commands or windows.
SS A - SET SWITCH
EThis command allows you to set any of the Apple's soft switches that I
Gexist in the address range from $C000 to $C0FF. To do so, simply enter F
"SS" followed by the lower byte of the desired address. For example:
:SS 50
sets switch $C050 (graphics on):
:SS 03
sets switch $C003 (read auxiliary memory)
FTo ensure that all types of switches are set, the ProDev DDT does one /
write and two reads of the selected location.
SD T - SET DISPLAY Type
ISet display is similar to Set Switch. It deals only with display formats H
Fand accepts more easily remembered switch identities. For example, to F
Dturn On the Double hi-res display, simply enter SS
D. The following
switch types are recognized.
1 - Select page 1
2 - Select page 2#
4 - Select 40 column display#
8 - Select 80 column display)
A - Select Alternate character set)
D - Display Double hi-res graphics'
F - Display Full screen graphics+
H - Display standard Hi-res graphics#
L - Display Low-res graphics*
M - Display mixed text and graphics&
N - Select Normal character set
S - Super hi-res {DDT16}>
T - Display Text screen {DDT16 turns off Super hi-res}
ON - DISPLAY ON
ION will restore the main ProDev DDT screen from almost any condition. If E
"text screen save" is on, the contents of the screen will be saved.
OFF - DISPLAY OFF
COFF disables all screen displays by the ProDev DDT. This speeds up A
?tracing, which spends a great deal of time updating the screen H
Finformation. The EXecution command is still much faster but there are K
Icertain situations where the trace mode may be preferred. The saved text K
Iscreen will be restored if "text screen save" is on. The various display K
Iswitches will be restored to there original settings. This allows you to *
view the output from the target program.
KEy - SET
HKey is the name given to the one ASCII key code that will interrupt the H
FProDev DDT when it is tracing or executing multiple instructions. The G
Edefault is $93 (control-S). The high bit is always on. To change Key
simply enter:
the ProDev DDT will respond with:
:KEY =
HThe next key that you type will be accepted as the new code for KEY. If H
Fyou wanted control-A you would simply hold down the "Control" key and
press "A".
DEntering the correct Key while tracing or executing only pauses the L
Joperation. You may elect to continue by pressing any other key or exit to 1
the ProDev DDT command level by pressing "esc".