Bob supplied some excellent information - if I read it right his is based on the delta between various configuration prices rather than standalone field-addon prices (which may or may not be different!) or individual initial purchase prices. I have individual 8K core board pricing, but it is also possible my pricing is different because of the date of the information. My source is HP mfg. part no 5952-5532, printed 2/77, with "Prices Effective April 1". The publication is "HP 21MX computers Price Information". It also has 2100 cpu, interfaces, and peripherals. This pricelist is rather nice because it includes pricing on all the cabinets and misc. other stuff too - including monthly maintenance costs, cpu slots required, current draw, and prerequisites. 12885A 8K memory modules for field expansion were $3200 list, $16 monthly maintenance. Additional options (at no cost) were: -002 4k words to 12k words or 8k words to 16k words -003 16k words to 24k words -004 24k words to 32k words Along the same lines, I thought I'd provide the cpu pricing of the time for comparison to Bobs info & dates to put it in to time-line perspective. 2100A computer, including programmers console, extended arithemetic instructions, memory parity check with interrupt, power fail interrupt with automatic restart, and memory protect was $11,000 list, $85 monthly maintenance. Note that this was either with no memory or 4k, the pricelist isn't completely clear on this. Options were as follows: -008 computer with 8K memory $2500 list, $16 monthly maintenance -012 computer with 12K memory $4500 list, $24 monthly maintenance -016 computer with 16K memory $5000 list, $32 monthly maintenance -024 computer with 24K memory $7500 list, $49 monthly maintenance -032 computer with 32K memory $10,000 list, $65 monthly maintenance 2100S computer, including programmers console, extended arithmetic instructions, memory parity check with interrupt, power fail/automatic restart, memory protect, 16K words of memory, floating point instructions, DMA, Time Base Generator, and TTY interface was $16300 list, $12 monthly maintenance. Options were as follows: -024 24K memory was $2500 list, no increase in monthly maintenance -032 32K memory was $5000 list, no increase in monthly maintenance Brent wrote... Well, in 1977, you can bank on the above being "hard data". Each word on the 8K core boards was 17 bits (16 data an 1 for parity). Guess you could calculate it with or without parity. Brent wrote.... I'm always happy to talk to anyone about the HP 2100's :) Feel free to give him my contact information, direct email address, etc. The pricelist I'm quoting from above is fairly complete and would allow pricing of a complete system with all interfaces, cabinets, etc. including monthly maintenance. Best regards, Jay West

I had written.... To which Ben replied.... Not totally sure I know what you mean here... to get a 24K system you'd order one part... 2100S-024 which would total $18800. To get a 32K system instead you would order one part... 2100S-032 which would total $21300. You don't order the -024 and -032 options together. Remember, this is for initial order of a new system, not for upgrades and add-ons. Were you thinking you'd order both -024 to get it to 24 and then -032 to go from 24 to 32? That wasn't the case. Or were you asking something else? It is being worked on! I have a lot on my plate - bear with me. Jay

Someone wrote... Yes, but a few things to also consider.... The 1969 pricing is for the wrong product technically. It was for memory for the 2116, which is decidedly NOT a 2100A or 2100S and your contact was looking for memory pricing for the 2100A/S specifically. It is entirely possible that memory prices were changed substantially when the (albeit) same memory board was repackaged with the 2100 so I'd suggest considering the 1977 2100 memory pricing a bit more heavily. This is also of interest because the 1969 pricing was for a complete system and the delta was being deducted as the memory price. In addition, I'm not sure it would be completely correct to say that the 1977 pricing was for an "old product that had been superceded" as it was not really a dead product at the time. I should point out that the 2100A/S was not replaced with the 21MX boxes immediately (or shortly) after the 21MX came out. They were all marketed at the same time for a good while. More interesting to note, the 2100A was introduced in about 1971, and was not discontinued till approximately 1980. The first of the MX series was introduced around 1974. As you can see, there is a quite substantial period when both 2100A/S and 21MX systems were marketed. Just some thoughts for consideration, the final analysis will be somewhat subjective. Jay West