Altos ACS 8000-7 (8200) mainboard wanted / Shugart 4008 motor pulley

I use emulators as well, and have written some, but I also enjoy working with the real hardware. The Altos ACS-8000 series are all Z80's . JRJ On 7/10/2015 10:05 PM, wulfman wrote: > On 7/10/2015 7:50 PM, Jay Jaeger wrote: >> Long story, but.... >> >> I recently acquired an Altos ACS 8000-2 with an 8100-01 mainboard (which >> currently is not functioning). Acquired it on eBay where it was >> represented as an ACS-8000-7, along with an Altos 8000-7A 29MB hard disk >> (a Shugart 4008). The hard disk was fine, but the computer wasn't the >> one shown in the photo. (I arranged for a partial refund. At least the >> disk was the one in the photo. ;) ). >> >> I was wondering if anyone had an 8200 mainboard (the one with the logic >> for the hard disk on it) that they would be willing to sell at an >> affordable price? >> >> Also, I have a second Shugart 4008 hard disk, but it was configured for >> 50Hz - so the motor pulley is the wrong size. Anyone out there have a >> dead 4008 that they would be willing to have part with its motor pulley >> and belt (and get the 50Hz set in return)? (For example, I saw a >> posting on youtube with a wobbly platter set that probably is a good >> candidate... ;) ). >> >> Any tips on troubleshooting the mainboard on a double density Altos 8000 >> computer (mainboard 8100) would also be appreciated. I have already >> reseated the chips, polished the tarnish off some chips the apparently >> had silver-plated pins, etc., to no avail. Have dumped the ROM (2708). >> Next plan is to disassemble that, and slap a logic analyzer on "J2" >> which has all of the bus signals on it. >> >> Thanks in advance... >> >> JRJ >> > This is why i collect cpu emulators. I have almost every kind made. I do > however need some jumper headers for a 68000 HMI unit > thats set for 68008 mode but thats another story. > > > what main CPU does this use, 8080 or a Z80 or ??? > > >