eeprom-programmer

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Repeating last byte for all addresses

2

I'm having some difficulty with writing to the 256 eeprom. If I link pin 8 of the 74HC595 to GND the eeprom erases but won't write the test data. When...

8BitMark

This version was tested, and a few small bugs were fixed.

GregEakin

28c256 infinite loop while erasing

1

I modified the code so that it would overwrite the whole chip with 0xea. Turns out when i change the break condition in the erase loop to 32767 to match...

Cubzer

Update EEPROM write cycle to poll for completion

1

The code was stolen from here: https://www.reddit.com/r/beneater/comments/cc3o76/issues_programming_28c1620pc_200ns_eeproms_with/ I guess it should be carried through to the other files but this is a start. I'm enjoying your kit by the way...

brendon

at28c256 write protection

3

hi. i have a problem to program the at28c256 eeprom. with the at28c16 works perfectly . I have read in its datasheet that there is a write protection to unlock...

DavideRuzza

Sorry if this issue is in wrong place. I cannot find a project about 8-bit computer. But it is still about the data that are written to EEPROM. --- With...

hadrava

Use constant data array size to prevent address overflow

foxel

I've implemented a better-looking version for the EEPROM programmer using whitespace. So instead of "-009" it should be " -9". " 023" should now be " 23" and so on....

Indeximal

 Pin 13 on the 74HC595 chips (the output enable pin, OE) is labeled as "G", and pin 8 (the ground pin, GND) is not labeled. Both Pin 8 (GND)...

JeffreyDeanBrown

I'm not totally sure but my AT28C256 seems damaged. Adresses 0x7FE0 and 0x7FF0 returns 00 and when writting to them, the value is written to the next byte (respectively 0x7FE1...

ultrasuperpingu