Programming Forums > Application Development > Assembly

DaWei · Jun 29th, 2005, 7:21 AM

Some of my most creative Fortran programs were made by shuffling the deck before turning it in for processing

. Skip, Dup.

uman · Jun 29th, 2005, 2:07 PM

my grandfather actually used to work with those old punch cards. DaWei, you must be old!

Infinite Recursion · Jun 29th, 2005, 2:29 PM

Just think we have more memory in our hand held calculators now than we had in the largest mainframes back then. Interaction with punch cards or binary switches implies you are old or a historian

Think about DEBUGGING while using punch cards... ahhhhhhhhhhhh.

DaWei · Jun 29th, 2005, 2:31 PM

Let's just say I've been an engineer since before integrated circuits were commercially available :eek: . An old r�sum� synopsis can be found here. The first "computer" I built was a 4-bit full adder made with switches, relays, and flashlight bulbs.

EDIT: You interact with binary switches every day; from those are your CPUs made, even yet.

Infinite Recursion · Jun 29th, 2005, 2:55 PM

I'm talking about the binary switches, where you walk up to a set up toggle switches and flip it up or down to generate a value.

DaWei · Jun 29th, 2005, 3:07 PM

Been there, done that, too. I have a post here somewhere describing that method of booting the older computers. The definition of binary, however, is "two-valued". It applies to physical switches as well as to vacuum tubes and transistors and is universally use to describe the devices inside cpus and other logic circuits by us hardware types that employ the technology.

nnxion · Jun 30th, 2005, 7:20 PM

Quote:

Originally Posted by uman

my grandfather actually used to work with those old punch cards. DaWei, you must be old!

GRANDFATHER?! You must be YOUNG!

Scorpions4ever · Jul 1st, 2005, 3:36 PM

I've worked with an 8085 processor board where I had to enter stuff with a hex keypad

. What impressed me most was that the prof who taught the course could hand-assemble the code without consulting his asm-to-machinecode sheet. The man had memorized all the opcodes.

By the way, you could enter code directly in DOS too. I used to do the following quite a bit.

(Toggle Plain Text)

C:\>COPY CON reboot.com
Hold down alt-key, type 205 in the numeric keypad and release the alt-key. This types out character 205 (Hex. CD)
Ctrl-Y (This is character 25 (Hex 19))
Enter
Ctrl-Z (Tells dos that this is EOF)
Enter

This creates a file with the first two bytes set as 205, 25 (which is CD 19 in hex). If you consult your 8088 opcode list, this is the instruction for INT 19h , which is the same interrupt generated when you hit the ol' ctrl-alt-del combo

.

Next, I'd edit AUTOEXEC.BAT and put a line to execute reboot.com. You can figure out the rest.

║▓��dhαrlεy▓║ · Jul 1st, 2005, 5:07 PM

here is a link from Wikipedia which might be fairly useful in your endeavor. Or at least give some more insight into binary machine code.
Click Here For the Article good luck on writing a calculator. I remember a kit that my dad had when I was youger that he had built in the 70's that read cassette tapes and could store strings of numbers and perform some calculation. Just came to mind reading about the punch cards and such.

___________________________
Where a calculator on the ENIAC is equipped with 18,000 vacuum tubes and weighs 30 tons, computers in the future may have only 1,000 vaccuum tubes and perhaps weigh 1.5 tons.

Popular Mechanics, March 1949

teencoder · Jul 29th, 2005, 12:06 PM

Arn't .obj files big hex collections that translate into the machine code .exe in compileing languages.

Jun 29th, 2005, 7:21 AM	#11
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Some of my most creative Fortran programs were made by shuffling the deck before turning it in for processing . Skip, Dup. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jun 29th, 2005, 2:07 PM	#12
uman Expert Programmer Join Date: Dec 2004 Posts: 794 Rep Power: 4	my grandfather actually used to work with those old punch cards. DaWei, you must be old! __________________ Few people deserve to be compared to (Rush) Limbaugh, most of them were convicted at the Nuremburg trials. --WilliamSChips on Slashdot Last edited by uman; Jun 29th, 2005 at 2:08 PM. Reason: s/wwork/work/

Jun 29th, 2005, 2:29 PM	#13
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Just think we have more memory in our hand held calculators now than we had in the largest mainframes back then. Interaction with punch cards or binary switches implies you are old or a historian Think about DEBUGGING while using punch cards... ahhhhhhhhhhhh. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Jun 29th, 2005, 2:31 PM	#14
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Let's just say I've been an engineer since before integrated circuits were commercially available :eek: . An old r�sum� synopsis can be found here. The first "computer" I built was a 4-bit full adder made with switches, relays, and flashlight bulbs. EDIT: You interact with binary switches every day; from those are your CPUs made, even yet. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jun 29th, 2005, 2:55 PM	#15
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	I'm talking about the binary switches, where you walk up to a set up toggle switches and flip it up or down to generate a value. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Jun 29th, 2005, 3:07 PM	#16
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Been there, done that, too. I have a post here somewhere describing that method of booting the older computers. The definition of binary, however, is "two-valued". It applies to physical switches as well as to vacuum tubes and transistors and is universally use to describe the devices inside cpus and other logic circuits by us hardware types that employ the technology. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jul 1st, 2005, 3:36 PM	#18
Scorpions4ever Programmer Join Date: Jun 2005 Posts: 86 Rep Power: 4	I've worked with an 8085 processor board where I had to enter stuff with a hex keypad . What impressed me most was that the prof who taught the course could hand-assemble the code without consulting his asm-to-machinecode sheet. The man had memorized all the opcodes. By the way, you could enter code directly in DOS too. I used to do the following quite a bit. (Toggle Plain Text) C:\>COPY CON reboot.com Hold down alt-key, type 205 in the numeric keypad and release the alt-key. This types out character 205 (Hex. CD) Ctrl-Y (This is character 25 (Hex 19)) Enter Ctrl-Z (Tells dos that this is EOF) Enter C:\>COPY CON reboot.com Hold down alt-key, type 205 in the numeric keypad and release the alt-key. This types out character 205 (Hex. CD) Ctrl-Y (This is character 25 (Hex 19)) Enter Ctrl-Z (Tells dos that this is EOF) Enter This creates a file with the first two bytes set as 205, 25 (which is CD 19 in hex). If you consult your 8088 opcode list, this is the instruction for INT 19h , which is the same interrupt generated when you hit the ol' ctrl-alt-del combo . Next, I'd edit AUTOEXEC.BAT and put a line to execute reboot.com. You can figure out the rest.

Jul 1st, 2005, 5:07 PM	#19
║▓��dhαrlεy▓║ Newbie Join Date: Jul 2005 Location: Arizona Posts: 19 Rep Power: 0	here is a link from Wikipedia which might be fairly useful in your endeavor. Or at least give some more insight into binary machine code. Click Here For the Article good luck on writing a calculator. I remember a kit that my dad had when I was youger that he had built in the 70's that read cassette tapes and could store strings of numbers and perform some calculation. Just came to mind reading about the punch cards and such. ___________________________ Where a calculator on the ENIAC is equipped with 18,000 vacuum tubes and weighs 30 tons, computers in the future may have only 1,000 vaccuum tubes and perhaps weigh 1.5 tons. Popular Mechanics, March 1949

Jul 29th, 2005, 12:06 PM	#20
teencoder Hobbyist Programmer Join Date: Jul 2005 Posts: 158 Rep Power: 0	Arn't .obj files big hex collections that translate into the machine code .exe in compileing languages. __________________ Geeks may not be cool now but in the long run they prosper.

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Programming Forums > Application Development > Assembly

binary compiler?