Hi Don & to All... I put together a list and included it in the Manual. The Manual also covers the jumper settings, a block diagram, some verbage and the ECO change.
Please find the manual on the Wiki page http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder¶m=S-100%20ALTAIR-IMSAI%208080%20CPU%20Board I don't know about starting a "Build Page". Regards, Josh Bensadon Date: Tue, 8 Jul 2014 10:17:25 -0700 Subject: Re: [N8VEM-S100:4500] Re: ALTAIR/IMSAI 8080 CPU replacement board -MOD From: [email protected] To: [email protected] CC: [email protected] Josh, Have you put together a bill-of-materials yet? Is there a build page on the N8VEM wiki yet? If not I can start one and add a BOM like I did for the backplane, complete with part numbers for Mouser, digi-key. On Tue, Jul 8, 2014 at 9:48 AM, Crusty OMO <[email protected]> wrote: Hi Group, Some of you have recieved this board already. I wish to inform you that 1 mod is required. I did not design the 3.3V to 5V circuit well enough and as it turns out, it's not really even needed. The 3.3V data output of the SD Memory Card can be tied directly into the LS TTL input of the 74LS299 shift register. One trace needs to be cut for this mod. I am working on a manual for this board, I plan to publish it later today. But, for now, before you build, you might want to cut this trace. The trace is on the component side, from pin 11 of the 74LS299 chip. Just below the silk screen text "SD LOOP BACK", there is the best place to cut it since there is ample space on either side. See photo attached. A jumper wire then should then be placed between the resistor lead above the silk screen text "R7" to pin 11. Regards, 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. -- ------------------------------- 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. -- 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.
