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- EPROMmer softare package V2
- ---------------------------
-
- After working with the original EPROMmer package for more than a year, I
- finally decided to rewrite the driver program in C. The result is in this
- file. Operating the program is quite simple. I have added a few functions
- such as:
-
- 1. Blank EPROM checking.
- 2. Comparing the RAM buffer with an EPROM in the socket.
- 3. Editing RAM values.
- 4. Multiple programming algorythms. Currently the new algorythms are the
- 50ms pulse algorythm for the original 2716,2732,2732A, intel's intelligent
- algorythm, EPROMmer's original algorythm, and a one pass write algorythm
- for use with the new 62256 personality module.
- 5. Caliberation mode for VPP, and parallel port test.
- 6. The program now allows writing bytes which are partly written. If the
- EPROM contained $E0 for example, $C0 can be written. The original BASIC
- program did not allow this.
-
- There is also a new hardware module for writing and reding 62256 static
- RAMs. I have used this module with a non volatile RAM socket such as
- Dallas Semiconductor's DS1213C. This socket supplies backup VCC for the
- RAM chip which is plugged into it. It can be an excellent replacement for
- EPROMs during development. Notice that because the way EPROMer is built,
- writing the chip is not as fast as you would expect from a RAM chip. In
- fact, the write operation is fast, but setting up the chip takes time,
- because after each write operation a read operation for verify must be
- made, which requires rewriting the high address byte because I used A15 for
- the /WR pin.
-
- There is also a new VPP test command. This command sets VPP to the value
- appropriate for the current chip type. Use this function to caliberate the
- circuit after you finish building it. NEVER USE THIS MODE WITH AN EPROM
- PLUGGED IN!. This mode also toggles the 3 control lines that are taken
- from the parallel port. You can use this to test them with a voltmeter. I
- used this function after I blown up a CIA chip since I needed a way to
- check if my parallel port is still alive. This function doesn't currently
- toggle the parallel port data bits because it inteferes with the VPP setup.
-
- Command summary:
- ----------------
- *) Use the chip type gadgets to select a chip type.
- *) Use the programming algorythm gadgets to change the default programming
- algorythm type.
- *) Use 'Load file' to load a file into RAM, starting at the address in the
- 'RAM address' gadget.
- *) Use 'Save file' to save a file from RAM, starting at the address in the
- 'RAM address' gadget, and who's length is taken from the
- 'Number of bytes' gadget.
- *) Use 'Read EPROM' to read data from the EPROM starting at address
- 'EPROM address', into the RAM starting at address 'RAM address' for
- 'Number of bytes'.
- *) Use 'Program EPROM' to write data to the EPROM starting at address
- 'EPROM address', from the RAM starting at address 'RAM address', for
- 'Number of bytes'.
- *) Use 'Compare EPROM' to compare data from the EPROM starting at address
- 'EPROM address', with the RAM starting at address 'RAM address' for
- 'Number of bytes'.
- *) Use 'Check EPROM' to make sure an EPROM is empty.
- *) Use 'Read byte' to show the byte store in RAM at address 'RAM address'
- in the 'RAM value' window.
- *) Use 'Write byte' to write the byte who's value is in the 'RAM value'
- window, into RAM at address 'RAM address'.
- *) Use VPP check to toggle the test mode. NEVER USE THIS WITH AN EPROM
- PLUGGED IN!.
-
- Hardware modifications:
- -----------------------
- I made a few hardware modifications to the circuit in order to make it
- work better, and to make caliberation easier.
-
- *) I replaced the 4.3K resistor conencted to the LM317, with a 5K trimmer.
- This way I can get accurate 25V for 2716.
- *) I replaced the 2N3904 with 2N2464. I guess this is not necessary, but for
- some reasons I couldn't make my on programmer work until I used these
- transistors, which I saw on a friend's EPROMmer.
-
- Compiling the program
- ---------------------
- The program compiles under Lattice C V5.10a, and requires Power Windows 2.5
- to edit the panel. for those of you who don't have PW, I have included a
- copy of the panel in the file EPROMmer.h, as well as the original
- PowerWindows file under the name EPROMmer.pw . The program also requires a
- precompiled symbol table of all the Amiga includes. If you don't have such
- a file, you will have to find which include files the program requires, and
- add them to the source code, before you compile.
-
- The program also uses and requires CygnuSoft's req.library . It is included
- here for those who don't have it.
-
- Disclaimer
- ----------
-
- The program is thereby placed in public-domain. Use it for whatever you
- like, abuse it, or even use parts of it in commercial programs (if you can
- find something worthwhile in the code ..)
-
- No warranty is given, use the program at your own risk, etc.
-
- If you use this program and have EMail access, I would be glad to hear your
- opinion about the program.
-
- Many thanks for Bob Blick for the original project...
-
- Enjoy!
-
- Udi Finkelstein
- 10 Glitzenstein st.
- 64686 Israel.
-
- finkel@math.tau.ac.il
-