Thread View: alt.folklore.computers
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Started by Gareths Downstairs Computer
Sun, 20 May 2018 10:01
BCD, binary, accounting or financial planning?
Author: Gareths Downstairs Computer
Date: Sun, 20 May 2018 10:01
Date: Sun, 20 May 2018 10:01
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Subject to storage and time limitations, all the major processors are Turing machines that can be programmed to give you 1000+ digits of integer plus 1000+ digits of fraction in either binary or decimal.
Re: BCD, binary, accounting or financial planning?
Author: Charlie Gibbs
Date: Sun, 20 May 2018 12:35
Date: Sun, 20 May 2018 12:35
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On 2018-05-20, Gareth's Downstairs Computer <headstone255.but.n...@yahoo.com> wrote: > Subject to storage and time limitations, all the major > processors are Turing machines that can be programmed to > give you 1000+ digits of integer plus 1000+ digits of fraction > in either binary or decimal. One quirk of the Univac 9300 was that it ignored the multiplicand length specification in the MP instruction and scanned through memory until it found a valid sign. I discovered this one when I accidentally packed a blank in the low-level byte and found that fields beyond the multiplicand were being clobbered. I exploited this by writing a program to calculate factorials in a field that was 50,000 digits long. Each multiplication took about half a second. -- /~\ cgibbs@kltpzyxm.invalid (Charlie Gibbs) \ / I'm really at ac.dekanfrus if you read it the right way. X Top-posted messages will probably be ignored. See RFC1855. / \ Fight low-contrast text in web pages! http://contrastrebellion.com
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