Hi Dan,
but it must be the 1k resistor, because “80 xx xx” events are only sent when the dump content is zero.
Which voltage do you measure between Vss and Pin RA4? should be ca. 5V (and not 0V)
So far as I remember you own some 24LC256 - could you test one in order to ensure that the BankStick interface works correctly?
Best Regards, Thorsten.
Which voltage do you measure between Vss and Pin RA4? should be ca. 5V (and not 0V)
5.8V
So far as I remember you own some 24LC256 - could you test one in order to ensure that the BankStick interface works correctly?
I’ll try now…
Cheers
ooof! 5.8v? Thats is too much! Hope that your 7805 is working?
Best Regards, Thorsten.
all other test points are correct - gettin the 5v elsewhere including after the 7805…
it wasnt 5.8V it was 5.07V i had the gnd probe on the dc in vss 
so, i just replaced the 1K resistor - made no diff…
I’ll still try adding a bankstick
cheers
burnt the bankstick test f/w and plugged in the bank stick (new unused eeprom), LCD just reads ‘Please connect/unconnect Stick’…
Tried with 2 eeproms - same message
Hi Dan,
so: something must be wrong with the BankStick interface. Could you make a high-resolution image of the upper half of your board and post it here? This would possibly allow me to give you more tips
Best Regards, Thorsten.
;D ;D
i ended up just ripping that core out and using an old one that i restuffed - working midibox followed!!
no more error messages 
the bankstick doesnt appear to work still but i think thats down to me a) wiring the pinouts wrong, or b) killing the eeprom when soldering on the pins - who knows? i’ll check, and check, and check…
phew…
Finally… :D
Perhaps some tracks of the not-working core module are not good enough, before you kick it into the trashcan you should try to fix the connections with small wires.
I must say that I still have respect for people who etched the boards by themself. I never did something similar, I always got support from friends with more experience in etching. Such imperfections during the first tries are quite normal - I would run into the same problems!
Best Regards, Thorsten.
yeah, it already had a few wires beneath due to bad tracks - I was using the PNP for etchin (my attempts with the exposing/developing way resulted in 2 cracked glass sheets - which were from the coffee table!, due to the heat of the lamp - the lady was not impressed :o) - but they didnt come out the laser as clean as i expected (prolly due to the toner cartridge), once etched the tracks were pretty grainy and un-even…
has/is been tough tho, i came into this with NO EE knowledge what so-ever! the reason i wanted to etch myself was cos I wanna make MANY midiboxes - in the hope of finally having a studio that is totally custom to how i work…and this is/has/will be possible to that supercharged genius of yours! BIGUP THE T! 
Nice1
Dan
Bout time ;D ;D ;D
good for you D
cheers Ian!
will post some pics later today hopefully
So here it is…
Made this as a primer before i tackle bigger MB64 and MBLC. Def pleased with it, gonna use it as a portable jobbie - might wack a handle on the cover kinda midi lunchbox stylee…
Best…
Dan
Mmmmmmm,…very shineeee…got a lot of chrome at your place
Nice work
Ian