<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">Am 27.12.2024 um 08:35 schrieb Donald Tillman <<a href="mailto:don@till.com" class="">don@till.com</a>>:</div><br class="Apple-interchange-newline"><div class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">If it was me, I would have directly emulated the chip with, say, 6 CD4040's and some diodes.</span></div></blockquote></div><br class=""><div class="">That’s what Elektor did in 1974:</div><div class=""><a href="https://www.elektormagazine.de/magazine/elektor-197411/55706" class="">https://www.elektormagazine.de/magazine/elektor-197411/55706</a></div><div class=""><br class=""></div><div class="">They used TTL chips, not CMOS. It was quite a huge project. I remember this so well because this was one of the first Elektor issues I bought myself.</div><div class=""><br class=""></div><div class="">Ingo</div></body></html>