I've been scanning the web in search of any code listings for these processors. Intel once had a library for some of these but it seems most is lost. I've found reconstructed listing for the Intellec4/40. I've seen just about all that existed in Intel's manuals. I even found an interesting listing that was to be used by the navy for plotting two ships courses ( interesting ) for intercept. Still, in general I'm coming up blank. Does anyone have a stash of paper tapes or listings? Dwight

On Thu, Mar 17, 2016 at 1:43 AM, Eric Smith <spacewar at gmail.com> wrote: Wow, an engineering sample 4040. Very nice. Highly sought after by those CPU collectors out there. You should be abel to build a nice system from that. No telling what those hybrid packs did. Can't say I've come across many 4004/4040 designs with such devices. Kyle

Hi The 4289 can be used for RAM with the 4040, using the WPM and RPM. It can be used on the 4004 but it is limited to WPM only. The RAM can then be use for both program and for data. I don't recall if the 4008/9 support the RPM but I can look that up later tonight. It sounds like you may have a MCS4-02 or -03 board. I'd love to see a picture of what you do have. Don't assume the EPROMs are empty. I have a working system with 3 1702As programmed in 1973. They still contain the original data and work fine ( I have of course backed up the data ). There are several assemblers and simulators available on the web. I use my own home brew assembler and simulator. The assembler is straight forward but simulators are tricky. If you don't know how to write code ( usually using the same compiler ) you may not be able to do much useful simulation. Attaching realtime I/O functions can be tricky as they are the useful testbench part of the simulator. You are welcome to my tools but they are written in Forth ( Win32 Forth ). In any case, please don't erase the EPROMs, thinking they are blank. I offer my services to read them. Also, there may be someone closer to you that can extract the data. It is also, not that hard to create a socket adapter to read out on a programmer that can read 2716's. It does require an extra power supply for the -10V. Dwight ________________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Eric Smith <spacewar at gmail.com> Sent: Thursday, March 17, 2016 9:19 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Code listings for the I4004 or I4040 On Thu, Mar 17, 2016 at 9:04 AM, Kyle Owen <kylevowen at gmail.com> wrote: I noticed that it was an engineering sample, but hadn't really thought about that making it more valuable to collectors. Perhaps I should sell that chip and buy a production 4040 for my homebrew system. I'd also like to get a 4201 clock generator, 4289 memory interface (replaces 4008/4009 pair with one chip), 4265 GPIO, and 4269 keyboard/display interface. And some 4002 RAMs.

On Thu, Mar 17, 2016 at 1:18 PM, dwight <dkelvey at hotmail.com> wrote: I know about that; what I was asking about was whether the 4289 (or 4008/4009) could replace "normal' 4002 RAM. I think the answer is negative. I can read them. Or rather, I could if I had them. The sockets are empty.

Also, I've found a source for 5.185MHz crystals. ACE Components has some. They are in San Jose, on Oakland Rd. Dwight ________________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of dwight <dkelvey at hotmail.com> Sent: Thursday, March 17, 2016 7:51 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Code listings for the I4004 or I4040 Eric The answer is no and yes. You can not use the normal RAM instructions with the 4289. Still, one can have RAM through the 4289. It would have no status RAM like the 4002s but for a program that is written to use conventional RAM through the 4289, it has no more overhead than regular 4002s, for character RAM. You'd setup a register pair as a pointer and a SRC, just like 4002s for character RAM. If you only need quick access of status RAM, you are stuck with 4002s or, create your own circuits. So, I wouldn't say yes and no, I think no and yes is the answer. I did look up to see if 4008/9 recognize the RPM. The 4040 shows WPM for both 4289 and 4008/9 but only shows RPM for the 4289. I take that to mean that the 4008/9 doesn't support the RPM, even with the 4040 processor. Dwight ________________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Eric Smith <spacewar at gmail.com> Sent: Thursday, March 17, 2016 1:23 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Code listings for the I4004 or I4040 On Thu, Mar 17, 2016 at 1:18 PM, dwight <dkelvey at hotmail.com> wrote: I know about that; what I was asking about was whether the 4289 (or 4008/4009) could replace "normal' 4002 RAM. I think the answer is negative. I can read them. Or rather, I could if I had them. The sockets are empty.

On Fri, 18 Mar 2016, Brent Hilpert wrote: We have this Prolog 900 too and I remember the hand written firmware listing in the manual. It should be somewhere in a pile of papers. And we have the Prolog M980, which contains a 4040. And we also have a PCB, containing a 4004 system. I once reverse engineered the hardware and added a keyboard an a display to it. I wrote a program for an desktop calculator. Integer only, but it can calculate square roots. With luck the source for this should be on an old PC of mine. look at www.computermuseum-stuttgart.de/dev/i4004 (sorry, I didn't translate this page. We have also the "MCS-4 Users Manual" (Feb. 1973, Rev. 4). It contains some coding examples (16 digit addition, BCD to binary conversion, A-D- converter) Klemens -- klemens krause Stuttgarter KompetenzZentrum fyr Minimal- & Retrocomputing. http://computermuseum.informatik.uni-stuttgart.de

On Mar 18, 2016 9:15 AM, "dwight" <dkelvey at hotmail.com> wrote: I've seen one 4308 in the wild: in a later generation ARC RT-485A NAV/COM radio. The earlier ones just use four 4001s. Kyle

There is a 4201 by national semi on ebay. I bought a 4201 recently for around $10. I'm mostly looking for a 4040. I have a 4289, three 4002-1s and two 4002-2s. I'd like to setup the 4289 such that I have a boot ROM and then shadow it into RAM. I'd then disable the ROM and run on RAM only. The 4040 is a lot easier to setup for both write and read from the RAM. I also have an extra 4004 but it is an early zebra. I'd like to hang on to it. Dwight ________________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Paul Birkel <pbirkel at gmail.com> Sent: Saturday, March 19, 2016 11:40 AM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: Code listings for the I4004 or I4040 -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Brent Hilpert Sent: Friday, March 18, 2016 5:41 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Code listings for the I4004 or I4040 ..... I had a failed 4201 chip (clock gen), it would be nice to come across a replacement, but solved the problem with a substitute made from 3 CMOS chips. ----- Brent: Could you share your CMOS circuit design for a 4201 substitute? THX!

On Thursday (03/17/2016 at 10:04AM -0500), Kyle Owen wrote: I too have an engineering sample i4040 from 1975 (7504 date code). I found it in the attic of the place I worked while in high school in 1979. I saved it along with a second non-ES device all these years. Recently, I got the bug to see if either of these parts were still good and so I bought one of these, http://www.cpushack.com/mcs-4-test-boards-for-sale/ and sure enough, both 4040s are still good and run just fine on this test board. So count me in for collecting and sharing 4004/4040 code and simple system designs. This test board is a pretty simple design but there's still something fun about hand wiring a board, writing a little monitor and bringing it up to talk to a teletype ;-) Chris -- Chris Elmquist N?JCF