1 Apr 03:29
Re: Adding bitchin100 to Firefox
Nice trick, John. Thanks. :) On Tue, Mar 31, 2009 at 5:14 PM, John R. Hogerhuis <jhoger@...> wrote: > I just noticed this... you can add Bitchin100 as a search engine to Firefox. >
1 Apr 05:24
RE: Undocumented overflow flag (X5 or K)
On Tue, 31 Mar 2009 18:53:58, Steve Adolph wrote: > looks like DCX and INX only for UI/X5/K flag..according to tundra and > the undoc85 pdf. > > wonder what Ken coded? I only coded INX and DCX, but it appears DSUB also sets this flag (I wrote some code and tested it). I'll check DAD also and report back. I'll have to add this to VT. Ken
1 Apr 05:51
RE: Undocumented overflow flag (X5 or K)
On Tue, 31 Mar 2009 20:24:22, I wrote: > I only coded INX and DCX, but it appears DSUB also sets this flag (I wrote some code and tested it). I'll check DAD also and report back. I'll have to add this to VT. Looks like DSUB modifies the X5 flag but DAD does not. Ken
1 Apr 09:10
Re: Undocumented overflow flag (X5 or K) - What about emulation?
Does VirtualT handle the "undocumented" instructions? BTW, I've created a new TASM table for the 80C85 which implements: 1/ The undocumented instructions 2/ Z80 Mnemonics for those of us who've never mastered Intel assembly The latter is less prone to unwanted results than using a genuine Z80 assembler because only 80C85 instructions are supported. Steve has the files to put them in the library. -- -- Marcus http://www.mvcsys.de
1 Apr 09:32
RE: Undocumented overflow flag (X5 or K) - What about emulation?
On Wed, 1 Apr 2009 09:10:20, Marcus von Cube wrote: > Does VirtualT handle the "undocumented" instructions? Yes, VirtualT handles the "previously undocumented" instructions and X5 flag (except the newly discovered modification of the X5 flag by the DSUB instruction). Ken
1 Apr 17:25
Re: OT -- Morse Code from Planet Venus Discriminated on March 25, 2009
Hello Vic: > And I thought E-M-E was difficult. The mean distance between planet Earth and its Moon is 384,400 kilometers, thus the mean 2-way Earth-Moon-Earth (E-M-E) radio path distance is 768,800 kilometers (i.e., 238,712 miles). Compared to the 2-way Venus-Earth-Venus (V-E-V) radio path distance of 100,000,000 kilometers (i.e., 62,100,000 miles) the ratio of distance is 130:1. All radiant energy exhibits the inverse-square relationship with respect to power versus distance. At 2 times the distance for example, the power is ¼ as intense. For a 130:1 ratio of distance, the power is 0.000059 as intense. Expressed in decibels, this amounts to -42 dB. In other words, a V-E-V installation must produce 42 dB more overall gain than does an E-M-E installation in order to achieve comparable performance over the radio path. Note that this calculation ignores any difference in radio reflectivity of the Moon versus planet Venus. Whatever that difference may be, I suspect it makes the situation more daunting than -42 dB. Given the difficulty spanning radio paths of mere solar system proportions, the "E T phone home" intergalactic situation is not feasible by any means known to man. Of course E T knew how to span that vast distance (according to the Hollywood script writers). > PS do you keep the bit in silicone cooled with liquid nitrogen? if not - how? I will not answer the question. I trust nobody enough to reveal where, or in what fashion, I keep the Primordial Bit. Be assured, she rests easy in my(Continue reading)
1 Apr 17:37
Re: Undocumented overflow flag (X5 or K)
<Shooting in the dark> How about the Decimal Adjust Acumulator instruction influencing the X5 flag? Keeper of the Primordial Bit (born of the Big Bit Bang), -= Ron Wiesen =- ----- Original Message ----- From: "Kenneth Pettit" <kenneth_pettit@...> To: "M100 Mailing List" <m100@...> Sent: Wednesday, April 01, 2009 4:51 AM Subject: RE: Undocumented overflow flag (X5 or K) On Tue, 31 Mar 2009 20:24:22, I wrote: > I only coded INX and DCX, but it appears DSUB also sets this flag (I wrote some code and tested it). I'll check DAD also and report back. I'll have to add this to VT. Looks like DSUB modifies the X5 flag but DAD does not. Ken
1 Apr 18:41
Re: OT -- Morse Code from Planet Venus Discriminated on March 25, 2009
I'm sure ET's relatives had some great, low noise preamps. Sure am glad the P.B. is in your care. I sleep better. Thanks for the VEV info. One day I'll share the design of my 2 meter ambihelical, mercury vapor antenna. Getting enough glass tubing was tough, but have you tried to find mercury these days? :) 73, Vic On Wed, Apr 1, 2009 at 11:25 AM, Ron Wiesen <ronw@...> wrote: > Hello Vic: > > > And I thought E-M-E was difficult. > > The mean distance between planet Earth and its Moon is 384,400 kilometers, > thus the mean 2-way Earth-Moon-Earth (E-M-E) radio path distance is 768,800 > kilometers (i.e., 238,712 miles). Compared to the 2-way Venus-Earth-Venus > (V-E-V) radio path distance of 100,000,000 kilometers (i.e., 62,100,000 > miles) > the ratio of distance is 130:1. > > All radiant energy exhibits the inverse-square relationship with respect to > power versus distance. At 2 times the distance for example, the power is ź > as(Continue reading)
1 Apr 18:42
Re: Undocumented overflow flag (X5 or K)
I was thinking this was a 16bit operation flag - why would DAA get involved? Could be - but I just did not expect it. Or...maybe it is an indicator when there is a carry on a double calculation - like DAA? ..Steve On Wed, Apr 1, 2009 at 11:37 AM, Ron Wiesen <ronw@...> wrote: > <Shooting in the dark> How about the Decimal Adjust Acumulator instruction > influencing the X5 flag? > > Keeper of the Primordial Bit (born of the Big Bit Bang), -= Ron Wiesen =- >
1 Apr 18:48
Re: Undocumented overflow flag (X5 or K)
On Tue, Mar 31, 2009 at 8:51 PM, Kenneth Pettit <kenneth_pettit@...> wrote: > Looks like DSUB modifies the X5 flag but DAD does not. > Ken > Wow. I think it's pretty amazing that in 2009 there is still anything to learn about the 8085. I guess if you want to figure out if you really know how something works, try writing an emulator-- John.
RSS Feed