Top Document: PDP-8 Frequently Asked Questions (posted every other month) Previous Document: What character sets does the PDP-8 support? Next Document: What about the LINC/8 and PDP-12? See reader questions & answers on this topic! - Help others by sharing your knowledge The total sales figure for the PDP-8 family is estimated at over 300,000 machines. Over 7000 of these were sold prior to 1970, and 30,000 were sold by 1976. During the PDP-8 production run, a number of models were made, as listed in the following table. Of these, the PDP-8/E is generally considered to be the definitive machine. If the PDP-8 is considered to be the Model T of the computer industry, perhaps the PDP-8/E should be considered to be the industry's Model A. MODEL DATES SALES COST TECHNOLOGY REMARKS PDP-5 63-67 116 Transistor PDP-8 65-69 1450 $18,500 Transistor LINC-8 66-69 142 $38,500 Transistor PDP-8/S 66-70 1024 $10,000 Transistor Very slow PDP-8/I 68-71 3698 $12,800 TTL PDP-8/L 68-71 3902 $8,500 TTL Scaled down 8/I PDP-12 69-73? 3500? $27,900 TTL Followup to LINC-8 PDP-8/E 70-78 >10K? $6,500 TTL MSI Omnibus PDP-8/F 72-78? >10K? <$5K TTL MSI Omnibus Based on 8/E CPU PDP-8/M 72-78? >10K? <$5K TTL MSI Omnibus OEM version of 8/F PDP-8/A 75-84? >10K? $1,317 TTL LSI Omnibus New CPU or 8/E CPU VT78 78-80 $7,995 Intersil 6100 Workstation DECmate I 80-84 Harris 6120 Workstation DECmate II 82-86 $1,435 Harris 6120 Workstation DECmate III 84-90 $2,695 Harris 6120 Workstation DECmate III+85-90 Harris 6120 Workstation Additional information is available in part two of this FAQ, where all known models of the PDP-8, along with variants, alternate marketing names, and other peculiarities are given. The last years of the PDP-8 family were dominated by the PDP-8 compatible microprocessor based VT78 and DECmate workstations. The Intersil 6100, also known as the CMOS-8 chip, was developed in 1976; GE later acquired Intersil. DEC also used the followup Harris 6120 microprocessors (Introduced 1981) in many peripheral controllers for the PDP-11 and PDP-15 as well as in the DECmate series of systems. While all of the earlier PDP-8 systems were open architecture systems, the DECmates had closed architectures with an integrated console terminals and limited peripheral options. It is interesting to note that the Harris 6120 was a 10Mhz chip and some chips could be clocked at 15Mhz; furthermore, the 6120 was essentially based on gate array technology. The following PDP-8 compatible or semi-compatible machines were made and sold by others; very little is known about many of these: MODEL DATE MAKER, NOTES TPA1001 69 Hungarian, KFKI product, transistorized. TPA1001/i 71 Hungarian, KFKI, IC version of 1001. TPA/i 71 Hungarian, KFKI, renamed TPA1001/i TPA/l 7? Hungarian, KFKI, enhanced TPA/i. TPAl/128H 7? Hungarian, KFKI, TPA/l with 128K memory. TPA/s 7? Hungarian, KFKI, based on Intersil CPU chip. TPA Quadro 8? Hungarian, KFKI, comparable to a DECmate. Electronica-100 ? Russian, discrete transistor technology. Electronica-100I ? Russian, probably a PDP-8/I clone. Electrotechnica-100I ? Yugoslavian, PDP-8/I? Possibly same as above. Saratov-2 ? Russian, built like a PDP-8/M but bulkier. SPEAR u-LINC 100 ? SPEAR, Inc, Waltham Mass (a LINC clone!) SPEAR u-LINC 300 ? SPEAR, Inc, Waltham Mass (a LINC clone!) DCC-112 70 Digital Computer Controls, PDP-8/L clone. DCC-112H 71 Digital Computer Controls MPS-1 74 Fabritek, PDP-8/L clone MP-12 74 (is this just different numbering of above?) 6100 Sampler 76? Intersil, their IM6100 promotional kit Intercept I 7? Intersil, based on IM6100 Intercept Jr 7? Intersil, based on IM6100 TLF MINI-12 77 Based on IM6100, in an elegant package. PCM-12 7? Pacific CyberMetrix, based on Intercept bus PCM-12A 77 Pacific CyberMetrix, fixed to clock at 4MHz SBC-8 84-88 CESI, Based on IM6120? SCSI bus More information on the Hungarian TPA series, built by KFKI (the Central Research Institute for Physics), was provided by Varga Akos Endre, hamster@telnet.hu; information on and photos of these machines are currently available from: http://www.internetto.hu/muzeum/e_tpa.html http://www.internetto.hu/muzeum/e_tpai.html The original machine in this series, the TPA1001, was built from the description in DEC's Small Computer Handbook. Only after the series was in production, when a machine was exhibited in Ljubljana, Yugoslavia, was full DEC compatability demonstrated, when a DEC user booted the TPA machine from a DEC paper tape. By the end of the TPA production run, around 900 PDP-8 compatable machines had been built. Given the Soviet era central planning for the computer industries in eastern europe, it is quite possible that the Electrotechnica and Electronica models listed above may have been TPA machines packaged for use in the USSR and other Soviet Block countries. It is amusing to note that the name TPA is very similar in origin to the name PDP used by DEC! There was a decree that computer development in Hungary was to cease, with all computers to be purchased from the USSR. In response, the people at KFKI ceased developing computers and began developing "Stored Program Analyzers" or, the acronym for which is TPA in Hungarian. The CESI (Computer Extension Systems, Inc.) machine had 128K words of local RAM on each processor card and allowed up to 4 processor cards per OMNIBUS, along with 128K words of global shared memory. 3 AMD 2901 bit-slice processor chips were used to build the 12-bit ALU and data paths, controlled by an 80-bit microword. User Contributions:Top Document: PDP-8 Frequently Asked Questions (posted every other month) Previous Document: What character sets does the PDP-8 support? Next Document: What about the LINC/8 and PDP-12? Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: jones@cs.uiowa.edu (Douglas W. Jones)
Last Update March 27 2014 @ 02:11 PM
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