Last updated Aug 3 2026 (C) Herb Johnson these are Intel P4001 chips as seen at various places or Intel boards where P4001 chips are found or missing. The 4001 was mask-programmed at the chip factory. I'd like to match chips with boards - please inform me. - Herb (Note: in 4001 ROM labels, can't distinguish between zero and letter-O ex "PP0P" could be "PPOP" or one and letter-I ex "PP1P" could be "PPIP" My edits vary according. - Herb Oct 2024) thanks for info to: Richard Main, and various uncredited persons who show photos of these cards and 4001's at various places (he he) ----------------------------- Observed sales or my-owned Intel boards with 4001's and related last updated NOv 2025 (c) Herb Johnson pwa 1002488-05 rev C upp-833 2732/64/ personality bd ebay pwa 1002488-06 rev M upp-833 personality bd ebay top row A5 P4001 1035 / 8136 / 102817-001 top row A6 P4001 1034 / 8135 / 102816-001 pwa 1002488-?? rev ? upp-833 2732/64/ personality bd ebay top row A5 P4001 1035 / 7925 / 9100242 top row A6 P4001 1034 / 7925 / 9100241 pwa 1000964-03 rev g 2716 (c) 1976 ebay bottom row chip has label middle row P4001 1015 / 8021 / 101476-001 top row j1 socket no jumpers pwa 1000366-?? rev D Prom Pgmr control ebay top row 4040, A6 and A7 empty sockets 2nd row A10 P4001 0197 / 7747 PPOC10? 3rd row A20 P4001 0936 / 7744 PPOC00? 4th row A29 P4001 0865 / B / 7745 PPOC01 pwa 1000366-04 rev F Prom Pgmr control top row 4040, A6 and A7 empty sockets 2nd row A10 P4001 0937 / 7882 PPOC10 3rd row A20 P4001 overwritten 52-??? 4th row A29 P4001 0865 / B / 7834 BJPPOC01 3604A card on my site 2nd row A22 P4001 1024 / 7747 PPIP88 or 38? bottom row A31 P4001-0381 / B / 7744 PP0P39 pwa 1002488-06 rev J or T? upp-833 personality bd top row A5 P4001 1035 / 8045 / 102817-001 top row A6 P4001 1034 / 8109 / 104591-001 pwa 1000964-02 rev D 2716 (c)1976 bottom row P4001 0941 / 7751 PP0P29 middle row P4001 1015 / 7748 PP1P78 top row J1 socket J2 jumpers 5-12 7-10 pwa 1000964 2716 (c) 1976 - UPP PROM board bottom row P4001 0941 / 7822 PP0P29 middle row P4001 1015 / 7827 PP1P78 top row J1 socket J2 jumpers 5-12 7-10 pwa 1000444 3604 (c) 1975 bottom row A14 P4001 0381 / 7518 PP0P39 bottom row A15 P4001 0855B / 7543 PP0?01 PWA 1001506-01A 3604A - UPP PROM board 2nd bottom row A22 P4001 1024 / 7747 PP1P88 bottom row A31 P4001 0381 / 7744 PP0P39 pwa 1000735-01C 8748 (c) 1976 - UPP PROM board bottom row A16 P4001 0941 / 7?30 PP0P29 bottom row A17 P4001 1012 / 7751 PP1P68 bottom row a18 P4002-1 / 1384C pwa 10001132-02 8755 (c) 1976 - UPP PROM board bottom row A16 P4001 0941 / 7647 PP0P29 bottom row A17 P4001 1012 / 7708 PP1P68 bottom row a18 P4002-1 / 3014A pwa 1000433-01 2708 (c) 1975 bottom row A11 empty middle row A5 empty top row J1 socket pwa 1002488-06J 2732/64 (C) 1979 - UPP-833 top row A5 P4001 1035 / 8045 / 102817-001 top row A6 P4001 1049 / 8109 / 104591-001 pwa 1000366 Control (c) 1975 <-- UPP control board A29 = PP0CO1, A20 = PPOC00, A10 = PP0C10 A5 empty 24-pin = 4040 pwa 1000444 3604 (c) 1975 bottom row A14 P4001 0381 / 7518 PP0P39 bottom row A15 P4001 0855b / 7543 PP0?01 (C?) pwa 1000444-01 3604 (c) 1975 bottom row A14 P4001 0381 / 7701 / PP0P39 B bottom row A15 P4001 0915 or 8? / 7546 PPOP48 pwa 100096? 2716 (c) 1976 bottom row A12 P4001 0941 / 7822 PP0P29 middle row A6 P4001 1015 / 7827 PP1P78 top row J1 socket J2 jumpers 5-12 7-10 pwa 0000736-01C 2716 (C) 1976 A16 p4001 0941 / 7630 PP0P29 A17 P4001 1012 / 7751 PP1P68 A18 P4001-1 1384C pwa 1001132-02B. 8755 hand-tagged bottom row A16 P4001 0941 / 7647 PPOP29 bottom row A17 P4001 1012 / 7708 PPIP?8 PWA 1000366- UPP 4040 control board A29 - C4001 0865 /7549B PP0C01 A20 - P4001 0936 / 7632 PP0C00 A10 - P4001 0937 / 7628 PP0C10 PWA 1000410 - UPP 1702A (c) 1975 programming board A13 - C4001 0938 / 7526 PP0P28 A14 - C4001 0941 / 7528 PP0P29 1000967-02C rev D 2708A (c) 1976 - UPP PROM board PC board looks the same as 1000964 PC board, note ROMS and J2 bottom row P4001 0941 / 7822 PP0P29 middle row P4001 1015 / 7827 PP0P78 top row J1 socket J2 jumpers 2-15 3-14 4-13 6-11 8-9 S1 switch 1 ON (right) other switches OFF (left) "1K" 1000964-02E 2716 (c) 1976 - UPP PROM board PC board looks the same as 1000967 PC board, note ROMs and J2 bottom row P4001 0941 / 7818 PP0P29 middle row P4001 1015 / 7816 PP1P78 top row J1 socket J2 jumpers 5-12 7-10 S1 all switches OFF (left) "2K" ------------------- Found on an 4004 unknown instrument Nov 2022 P4001 0544 / 7419 PVP002 P4001 0542 / 7419 PVP000 P4001 0550 / 7419 PVP008 C4001 0548 / 7411 PVP006 P4001 0549 / 7419 PVP007 P4001 0546 / 7409 PVP004 P4001 0545 / 7409 PVP003 P4001 0543 / 7419 PVP001 P4001 0547 / 7409 PVP005 Found on a 4004 unknown-brand board Nov 2025 C4001 0546 / 2402 PVP004 P4001 0550 / 7340 PVP008 P4001 0545 / 7345 PVP003 P4001 0542 / 7414 PVP000 P4001 0543 / 7416 PVP001 C4001 0544 / 7346 PVP002 P4001 0547 / 7409 PVP005 C4001 0548 / 7346 PVP006 P4001 0549 / 7348 PVP007 Found on a 4004 unknown-brand "P9 printer" Feb 2026 Found again, same board, July-Aug 2026 P4001 0813 / 7803 / 00C034 BI P4001 0814 / 7817 / 00C044 BI P4001 0812 / 7803 / 00C024 BI P4001 0949 / 7815 / 00C014 BI also 00C015 P4001 0815 / 7803 / 00C045 BI also 00C044 Found on a Midway brand arcade game by Taito "TV Basketball" P4001-0001 / B0464 P4001-0304 / B0798 P4001-0203 / S451 P4001-0102 / S461 [space marked "4001-04-05"] ================================ that-auction-web-site sales of 4001 chips, last updated Jun 2025 National Semiconductor INS4001 chips s* - 752 / INS4001-P8 / 230290 ?? - INS4001EKP/D, 4001EKN/D, 4001EKM/D, 4001EKL/D - T shaped board Nav-Com 725, 727, 729 s* - INS4001-P0 230282 7646 "from an instrument" s* - INS4001-P1 230283 7630 s* - INS4001-P2 230284 7727 s* - INS4001-P3 230285 7717 s* - INS4001-P4 230286 7717 s* - INS4001-P6 230288 7717 s* - INS4001-P7 230289 7729 s* - INS4001-P9 230291 7637 s* - INS4001-16A 230332 707 s* - INS4001-17A 230333 7650 s* - INS4001-19A 230325 7650 s* - INS4001-20A 230327 7650 s* - INS4001-21A 230328 7650 National lot, Mar 2024 INS4001-0 706 INS4001-1 /711 INS4001-2 533 INS4001-3 536 INS4001-5 /724 INS4001-6 /712 INS4001-7 535 INS4001-8 532 INS4001-9 /707 INS4001-16A 230332 /712 INS4001-18A 230334 /717 INS4001-19A 230325 /725 INS4001-21B 230349 /730 ----------------------------------- Intel 4001 chips A* - 4001 0812 / 8013 BI 00C024 see P9 printer above A* - P4001 0952 / 7916 214064 A* - P4001 0690 / 7605 178137 A* - p4001 0814 / 8020 BI 0032000-44 -- - p4001 0814 / 8051 BI 0032000-44 m* - P4001 0951 / 7619 214056 m* - p4001 0668 / 7505 180968 m* - p4001 0668 / 7507 180968 k* - P4001 0813 / 8106 BI 0032000-34 s* - P4001 0739 / 7721 053113 s* - P4001 0729 / 7645 051103 s* - C4001 0735 / 7645 053109 s* - P4001 1035 / 7006 9100242 s* - P4001 1012 / 7751 PP1P68 see Intel products above s* - P4001 0295B/ 7524 PP0C01 see Intel products above s* - P4001 0670 / 7428 180984 A* - P4001 0670 / 7428 180984 v* - P4001 0670 / 7501 180984 s* - P4001 0726 / 7710 053100 s* - P4001 0733 / 7709 053107 h* - P4001 0937 / 8102 PP0C10 see Intel products above n* - P4001 0815 / 8036 BI 0032000-54 a* - P4001 0250 / 7720 HLROM0 a* - P4001 0252 / 7720 HLROM2 c* - C4001 0486 / 7430 6-7003 ss - C4001 1024 / 7841 PPIP88 ss - C4001 0941 / 7614 PPOP29 ;INtel UPP board g* - C4001 0486 / 7334 67003 g* - C4001 0491 / 7347 6-7008 ku*- P4001 0323 / 240 146454 2n*- P4001 0669 / 7415 180976 m* - P4001 0669 / 7420 180976 mo*- P4001 0672 / 7502 182634 a* - P4001 0672 / 7428 182634 t* - P4001 0613 / 7513 C13488 v* - P4001 0885 / 7704 C13487 g* - P4001-0009 / 85227 ;Intel eval ?? - P4001 0950 / 7640 214049 v* - P4001 0950 / 7641 214049 gi - P4001 0666 / 7409 WLM-F0 s* - P4001 0667 / 7412 WLM-F1 ;"i" embossed in keyway. Mexico l* - C4001 0701 / 7420 6-7545 z* - P4001 0949 / 7850 BI 00D015 maybe P9 printer card above ** - C4001 0487 / 7408 6-7004 ;cer gold/grey traces ** - C4001 0491 / 7441 6-7008 ;cer gold/grey traces 2 pins damaged ** - C4001 0487 / 7447 6-7004 ;cer gold/grey traces -- - C4001 0489 / 7430 6-7006 ;cer gold/no traces v* - P4001 0329 / 7340 14644 v* - P4001 0381 / 7824 / PP0P39 B ; see Intel UPP card