I remember the 'go-faster' stripes that Burroughs had to put on the B2700 after 'upgrading ' it from a B2500. I beleive this was needed to convince the Customer that he had actually got something for his (quite a lot of) money. this upgrade was really little more than a jumper chjange clock speed increase also.
I also remember that a 600 cards-per-minute 2501-001 card reader could be upgraded to a 2501-002 (1100 cards-per-minute) by the replacement of a different sized gear wheel. If you owned ( and maintained) the machine , no-one could stop you! I always imagined that IBM's 'Licenced Internal Code' ( not to mentioned Graduated licnening charges, of course!) was a way to protect them from any one else being able to undo a 'Kneecapped' processor nowadays. > -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Black > Sent: Wednesday 22 June 2005 12:33 > To: IBM-MAIN@BAMA.UA.EDU > Subject: Re: Downgrade 9672 > > > I remnember Texas Tech getting a speed "upgrade" to there > 370/145 back > > in the 70's. It consisted of the CE removing three loops from the > > 145's microcode. The price tag for this upgrade? A cool $ 50K! > > I remember a story from long ago: Honeywell had a processed > that came in single and double speeds, with a price jump. If > you had the slower processor and paid to upgrade to the > faster, the CE removed a jumper that made the clock run at > half-speed! I can't swear this was true, could be one of > those urban computer myths ---------------------------------------------------------------------- This message and any attachment is intended for the use of the individual or entity to whom it is addressed by the first sender and contains information which may be confidential and/or privileged. If you receive this message and any attachment in error, delete it immediately and notify the sender by email or phone +612 9218 1000 Unless you have been expressly authorised by the sender, you are prohibited from copying, distributing or using the information contained in this message and any attachment Tabcorp Holdings Ltd(ABN 66 063 780 709)and its related bodies corporate "Tabcorp" is not responsible for any of the changes made to this message or any attachment other than those made by Tabcorp, or for the effect of changes made by others on the meaning of this message and any attachment Tabcorp does not represent that any attachment is free from computer viruses or defects and the user assumes all responsibility for any loss or damage resulting directly or indirectly from the use of any attachment ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
