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

Oh, yeah I get it - an in circuit emulator. With my logic analyzer I can also watch all the bus transactions (or directly on the CPU if needs be) to see what is going on, as well. I have an Intel MDS IV with an ICE for (IIRC) an 8051, but have never used it for that purpose to date. JRJ On 7/11/2015 2:42 PM, wulfman wrote: > no not a software emulator a hardware emulator you remove the Z80 and > plug in a cable > lets you step through the code test memory and run the board at full speed > hardware emulators are for the debugging of the hardware. > > unlike software emulators that run on a host PC that let you run old > software > > i have a ZAX Z80 emulator and a Applied microsystems Z80 emulator for > just that purpose > > On 7/11/2015 8:32 AM, Jay Jaeger wrote: >> 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 ??? >>> >>> >>> >