Sort of. The Z80 is a little-endian processor meaning that it sends the little part of the number first. It can get quite confusing with 32bit processors like the 80386 and up.
I think I'll be switching to Eagle. ExpressPCB is quick and easy to learn, but it has quite a few bugs and this bug may be the last straw for me.
It just compiles the code into a binary, IntelHex, etc . Writing it to the port is gonna be my program's job.
Like I said, LCC is a FREE compiler with no limitations. I can compile it into an EXE for you, but it would be pretty useless to you because it only sends that Z80 test program to the LPT port right now. Once I get it to read the output file from TASM then I'll post the EXE for you. The LCC compiler would let you modify the binary data to be downloaded right now if you were really itching to have a go at it.
I assume you mean the Z80 code. It just reads some bits from an IO port and then rotates them left and right over and over for a nice LED display. I just wanted to test TASM and my loader and it was short and easy.
I'd remove them because they'll load the Buss down too much when you interface all the other parts to it. When the Z80 is clocked at 4Mhz they'll all be "on" anyway.
That's pretty much what it's supposed to do. I've pretty much got my head around the 8bit IntelHex format that TASM uses. Now it is just a matter of making it work properly.
Then, i need to make some hardware! Yaha me! Ok, it is done and it works!
No you don't need to write anything. The end record just tells your program to stop.
It is designed to be connected to a complete Z80 system that includes RAM and EEPROM. I've used it to write to an in circuit RAM. It should also be able to program your EEPROM in circuit but I cannot test it because I don't have an EEPROM like yours. I'm not even sure which one you got.
My program waits 1ms after deactivating the WR line before going to the next byte. This should be enough time for a EEPROM write cycle but it is untested.
Playing on the company dime, eh? Lol. Just kidding. Maybe yet today. I'm not sure, it depends on how board i get. I want to use my big breadboard STRICALY for my z80 system. I do have a smaller bread board on my Radio Shack Learning Lab, but that breadboard sucks. The holes are too big, and they are too high up, so short pins don't quite reach the pins. I am going to try to rig something up so i can use 74LS273's instead. I think it should work. Actually you were right on the money there. I was bored and being paid.
It should work. The Max write time for that chip is 1ms. 0.5ms is typical.
No TriState buffers on those, but they'll work for a regular EEPROM programmer setup. (No in circuit programming) In my circuit you'd have to jumper the BUSREQ to the BUSACK for it to work.
