On Thu, 24 Feb 2005 20:08:50 GMT, Nicholas O. Lindan wrote:> "CBFalconer" <cbfalconer@yahoo.com> wrote > >> Once you have decided on decimal you might as well pick a better >> encoding. Excess 3 [1] has many advantages.> That takes me back to university. When BCD calculations were done > with 2-input nand/nor's. And 'RTL' meant something completely > different.RTL - Resistor Transistor Logic, what's it's other meaning? -- Linux Home Automation Neil Cherry ncherry@comcast.net http://home.comcast.net/~ncherry/ (Text only) http://hcs.sourceforge.net/ (HCS II) http://linuxha.blogspot.com/ My HA Blog
8051 floating pt routines
Started by ●February 22, 2005
Reply by ●February 24, 20052005-02-24
Reply by ●February 24, 20052005-02-24
On 2005-02-24, Neil Cherry <njc@wolfgang.uucp> wrote:> On Thu, 24 Feb 2005 20:08:50 GMT, Nicholas O. Lindan wrote: >> "CBFalconer" <cbfalconer@yahoo.com> wrote >> >>> Once you have decided on decimal you might as well pick a better >>> encoding. Excess 3 [1] has many advantages. > >> That takes me back to university. When BCD calculations were done >> with 2-input nand/nor's. And 'RTL' meant something completely >> different. > > RTL - Resistor Transistor Logic, what's it's other meaning?TV network in Europe? -- Grant Edwards grante Yow! Now my EMOTIONAL at RESOURCES are heavily visi.com committed to 23
Reply by ●February 24, 20052005-02-24
Neil Cherry wrote:> On Thu, 24 Feb 2005 20:08:50 GMT, Nicholas O. Lindan wrote: > >>"CBFalconer" <cbfalconer@yahoo.com> wrote >> >> >>>Once you have decided on decimal you might as well pick a better >>>encoding. Excess 3 [1] has many advantages. > > >>That takes me back to university. When BCD calculations were done >>with 2-input nand/nor's. And 'RTL' meant something completely >>different. > > > RTL - Resistor Transistor Logic, what's it's other meaning?Register Transfer Language, as well as Run Time Library, and more niche, Raster Transfer Language...
Reply by ●February 24, 20052005-02-24
"Neil Cherry" <njc@wolfgang.uucp> wrote> Nicholas O. Lindan wrote: > > [When I was in university] 'RTL' meant something completely > > different. > RTL - Resistor Transistor Logic, what's it's other meaning?Oh, I feel so much younger. RTL is now 'Register - Transistor Level/Logic', as in silicon compilers - Verilog & Co.: part functional block, part device. Most used in boastful claims: VaporWare III compiles 10,000,000 RTL gates/minute; adding a function block (register) takes about the same compute power as adding a transistor (low level gate). -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. To reply, remove spaces: n o lindan at ix . netcom . com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/
Reply by ●February 24, 20052005-02-24
"Jim Granville" <no.spam@designtools.co.nz> wrote> Register Transfer Language, as well as Run Time Library, and > more niche, Raster Transfer Language...Egg on my face. Time to go back to suhl. -- Nicholas O. Lindan, Cleveland, Ohio Consulting Engineer: Electronics; Informatics; Photonics. To reply, remove spaces: n o lindan at ix . netcom . com psst.. want to buy an f-stop timer? nolindan.com/da/fstop/
Reply by ●February 24, 20052005-02-24
Paul Keinanen <keinanen@sci.fi> writes:> I understand that the IEEE is currently working on extending the > floating point specification to also include decimal floating numbers.They did that many years ago. It was IEEE 854 radix-independent floating point. The current effort is to merge it into the next version of IEEE 754.
Reply by ●February 25, 20052005-02-25
On Fri, 25 Feb 2005 00:45:25 GMT, Nicholas O. Lindan wrote:> "Jim Granville" <no.spam@designtools.co.nz> wrote > >> Register Transfer Language, as well as Run Time Library, and >> more niche, Raster Transfer Language... > > Egg on my face. Time to go back to suhl.Hey got me too, I should have at least thought about run time library. I've always been more of a hardware person. Anyone for ECL? :-) -- Linux Home Automation Neil Cherry ncherry@comcast.net http://home.comcast.net/~ncherry/ (Text only) http://hcs.sourceforge.net/ (HCS II) http://linuxha.blogspot.com/ My HA Blog
Reply by ●February 25, 20052005-02-25
On Fri, 25 Feb 2005 00:33:58 GMT, Nicholas O. Lindan wrote:> "Neil Cherry" <njc@wolfgang.uucp> wrote >> Nicholas O. Lindan wrote: >> > [When I was in university] 'RTL' meant something completely >> > different. >> RTL - Resistor Transistor Logic, what's it's other meaning? > > Oh, I feel so much younger. > > RTL is now 'Register - Transistor Level/Logic', as in silicon > compilers - Verilog & Co.: part functional block, part device. > Most used in boastful claims: VaporWare III compiles > 10,000,000 RTL gates/minute; adding a function block > (register) takes about the same compute power as adding > a transistor (low level gate). >I thought that was all a part of VHDL (VHSIC Hardware Description Language). I just picked up a Cyclone-NIOS II kit for a little playing with. Also the new HCS_C (see HCS @ SourceForge below) has a large FPGA. Just a little more to learn every day. :-) -- Linux Home Automation Neil Cherry ncherry@comcast.net http://home.comcast.net/~ncherry/ (Text only) http://hcs.sourceforge.net/ (HCS II) http://linuxha.blogspot.com/ My HA Blog
Reply by ●March 1, 20052005-03-01
On 24 Feb 2005 17:18:45 -0800, Eric Smith <eric@brouhaha.com> wrote:>Paul Keinanen <keinanen@sci.fi> writes: >> I understand that the IEEE is currently working on extending the >> floating point specification to also include decimal floating numbers. > >They did that many years ago. It was IEEE 854 radix-independent >floating point.The IEEE-854 was a more or less abstract definition.>The current effort is to merge it into the >next version of IEEE 754.The current IEEE-754R is trying to make a concrete definition of the radix-10 of the abstract IEEE-854 document. Take a look at http://754r.ucbtest.org/ and from there, locate the current working document 754r.pdf (http://754r.ucbtest.org/drafts/754r.pdf) The decimal resolution is a huge mess with part of the most significant decimal digit intermixed with some exponent bits into the combination (G) field and the significand represented with a series of 10 bit densely packed decimal "declets" storing three decimal digits. Implementing all this with an 8 or 16 bit processor with reasonable performance is quit a challenge. Paul
