Cool. An IC tester would be a great additional. I checked eBay and there seem to be a lot of Chinese/Hong Kong Versions of the TL 866CS. Are thes TL866's an unauthorized knock off? I'm also seeing other similar versions. Most all are from overseas. I have grown to not trust these sources so much.
Recommendations of a decent low cost IC tester would be appreciated. On Mon, Aug 4, 2014 at 8:11 AM, Crusty OMO <[email protected]> wrote: > Jeff, I have the same issue... I pack everything away with the idea that > it's still useful, I will use it some day. Of course, in reality, I > probably reuse 1% of what I pack away... But every now and then, I come > across a project where I'm really happy I had that part in stock. > > I recently bought a TL 866CS eprom programmer and IC tester. I have only > used it a couple of times to program. But it's very neat to think it can > test the IC's too. > > How were those mis-labeld IC's? I heard China relabels some chips to scam > people. > > :)J > > > ------------------------------ > Date: Mon, 4 Aug 2014 10:28:09 -0400 > From: [email protected] > Subject: Re: [N8VEM-S100:4821] 8080 board BOM questions/Errata? > > To: [email protected] > > Josh, > Thank you for the updates! I will send some pics when I am into the > build. Due to my habit of extreme pack-rat-ism I only need to order a few > parts, like the SD card socket, the crystal, the resistor networks, the > HCT245 and the LS390. The years of accumulating parts from hamfests is > starting to pay off. :) BTW, I also bought an IC tester so I check every > TTL chip for functionality before I put it a board. I have found a few bad > chips this way & even a few mis-labeled chips. > Regards, > Jeff > > On 8/4/2014 12:52 AM, Crusty OMO wrote: > > Corrections made, new Rev 3 documents available at: > > > http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder¶m=S-100%20ALTAIR-IMSAI%208080%20CPU%20Board > > Regards, > Josh Bensadon > > > ------------------------------ > From: [email protected] > To: [email protected] > Subject: RE: [N8VEM-S100:4818] 8080 board BOM questions/Errata? > Date: Mon, 4 Aug 2014 00:13:31 -0400 > > Hi Jeff, > > 1. Oops... ECO#3 should be "RP2". RP3 remains as is (a 9 pin 4.7K > SIP). I will fix this shortly and upload a Rev 3 Manual. > > 2. I'll look at the BOM and correct. It indeed should be a 74LS390 as > listed in the BOM of the manual. > > 3. Mouser p/n 520-HCA1843-20X (Mfg P/N: ECS-184-20-1X) > > Please send pics when you can. > > Cheers, > Josh > > > ------------------------------ > Date: Sun, 3 Aug 2014 17:15:51 -0400 > From: [email protected] > Subject: Re: [N8VEM-S100:4815] 8080 board BOM questions/Errata? > To: [email protected] > > Josh/Don, > I was gathering parts for my build & I have some questions about possible > errors with the BOM for the 8080 CPU board. > > 1) I see that RP2 is now listed as a 47K network (was formerly a 4.7K > network) but I did not see that change documented anywhere. I realize that > the value of RP3 changed as documented in ECO#3 but I found nothing about > RP2. > > 2) IC E6 is now listed as a 74LS90 in the BOM but it is a 74LS390 in the > schematic, in the original parts list in the manual & on the board > silkscreen. The LS390 is a dual counter an is a 16 pin dip while the LS90 > is a single counter in a 14 pin dip. > > 3) I didn't see the recommended crystal X1 (18.432mhz) is not listed in > either the original parts list or the updated BOM. I was just going to > pick the one that Mouser has in stock. > > Thanks for all you are both doing for this project. I am look forward to > this build as well as as the Mini-FP board. > > Regards, > Jeff Galinat > > On 8/2/2014 3:43 PM, Crusty OMO wrote: > > Hi Don, > > Sure. I wrote it into the Rev 2 Manual. I also updated your > Bill-of-materials with the right values for RP2, but I missed adding it as > an ECO there. > > Cheers, > Josh > > > ------------------------------ > > > > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > > > > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- ------------------------------- Don Caprio [email protected] http://www.uxpro.com (925) 240-UNIX -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
