Recent content by squoril

recapped and pin header fixed the plus 100%

That's the error i get, I dont remember which eject method ive tried, will report back later, the HDT driver makes it appear as a standard SCSI hard drive. Run on ramble from here on -------- Some unrelated things i observed the driver on my zips was 5.0.3 and SCSI probe shows a version of...

That will put it in the wrong partition, a freshly formatted zip disk has 4 partitions (Viewable with silver linings), 3 small hidden ones, the third holding the embedded driver that is used when booting from a zip disk. The last partition is the majority of the disk and is the mountable HFS...

I used HDT 1.3.1 to burn the HDT generic driver onto a zip drive which made it bootable on a plus, very simple and easy to do. I have not tested the limitations but i do know System 7 wouldnt let me eject the boot/system zip so i will have to set up a second zip drive to be able to use a second...

As many of you know the mac plus requires iomega driver 4.2 to work on a mac plus, newer doesn't work. Ive also learned that mac formatted zip100 disks have a hidden partition with the embedded driver so it can be bootable, You can use IomegaTools to low level format the disk which replaces this...

I have discovered that IomegaTools 4.2 (not the driver 4.2) REQUIRES system 7 AND a Mac SE or newer to run (it needs the 256K ROMs or newer the plus uses 128K ROMs) so you have to use an alternate drivers loaded with HDT, silver linings, etc to make a zip bootable on a mac plus if you dont have...

It worked, drive had LB terminator packs. Heads were fused to the platter so i had to open it up and break it free. If i powered it on before i got happy mac from the floppy drive it would try and boot off the hard drive and give wierd screens and then flupflupflup from analog board (not...

Looks like the internal HDD out of the Classic II is a Quantum ProDrive LPS: Probable Jumper Options It has optional socketed termination resistors which are present so i dont think ill have to worry about any termination just straight wire to the DB25

that's what i was going to make electrically basically but its OOS, id need a cable still so ill go ahead with my parts order and pin up an IDC-50 cable into a DB25P and do some reading on termination

So i found this page where it looks like he was tapping into the internal scsi bus (which all goes to the DB-25 as well?) And this page which has a schematic of the IDC-50 to DB-25 internal wiring Is their any reason i cant just wire up an IDC-50 cable into a db-25 plug and run the hard drive...

Oh would look at the time 🤣 One of the large caps is bulging so im ordering a recap kit as well

Down by the FDC plug it looks like the electrolyte has gone down a via and delaminated internal layers. I had read some apple specific ICs could only come from harvested boards. Would a power on in a badly corroded state kill those rare chips (if they exist on a Classic II the RTC i think one...

First up is a IIc rom255 pre serial fix, very early. Board looks good but going to recap preventatively before powering up. (not a compact i know) Second is a mac plus with 4MB of RAM, chime but no screen, going to look into the common reflow on the connectors and maybe recap the AB Lastly is...

The DS2400/1 has a ~1nF capacitor inside to power itself, at idle the data line is pulled HIGH so the DS can charge up. An appropriate diode and capacitor should suffice to power an ATTINY while the data line is LOW for signaling. (should... IANAEE!) DS2400 series ESN emulation Here is a...