PROCESSOR GLICK

Hello Kirill! Saturday November 28 1998 12:34, Kirill Frolov wrote to Alexander Ageev: AA>> Really - as soon as this glitch was documented, it stopped AA>> be protection from the emulator ;) KF> Well, new versions of emu will not be made right away, and many can KF> use the old ones. Right away, right away - at least mine is definitely right away ;) Yes, by the way, is there anything else equally non-trivial in the Z80? Is there any tricky feature? By the way - I compared 5 Z80s from different companies and models - and almost all different... ;( (That is, there are differences in the flags after command execution, etc.) Does anyone still have the old, old Z80 from Zilog? (not CMOS of course) It is very necessary to obtain reference plates. :) Alexander

Hi, Alexander! AA> Can you check if the INI Carry flag changes on these processes? I tested it only on OUTI so that the data was stable. Is this the same with INI, or should it be separate? AA> In theory it shouldn't - but it seems to change the processor on CMOS, and this is nonsense. tested the trace. protsy: Goldstar Z8400A '90 '85 SGS Z8400AB1 ZILOG Z0840004PSC 90th year ZILOG Z8400A '84 KR1858VM3 '95 (Soviet CMOS) On all processors, the OUTI command affects the C flag. it was not possible to detect a pattern, although with the same data, the result is always the same on all processors. HL=#2D50, BC=#..FE, 16 commands located at #8000 give the following: .....S...S..SS.S, bytes that lie from this addresses in ROM: 0F30022F3CF521925CCD0B35EFA438F1. AA> Yes, Dima, do you know anything about the work of ULA? almost nothing... AA> I've been picking apart all the toys with multicolors, trying to understand how she is AA> works - nothing is clear ;( If you find out, it will be possible to launch a shock, I won’t be lazy, I’ll do it finalization. The only trouble is that all branded cars have different makeshift 48, 128, +2, +2a, +3 - all different. All the best. Dmitry. ..LD..X-TRADE..

Hello, hello Alexander! One day, in the chilly summer, something around (10-11-98/00:44:06) Alexander Ageev once wrote to Dmitry Lomov... AA> Separately, these are 2 different songs ;) By the way, you know that OUTI is at the beginning AA> decrements B, and then puts it on the bus? Interesting joke AA> ;) You can test by writing to any 8-bit register AY. IMHO - another glitch. I have the book "Z80 Microprocessor Kit: Book 1 Z80 CPU" written: OUTI | ... | (C)<-HL ADR<-B/C | ... | | then B<-B-1 | | | HL<-HL+1 | DL>> on all processors, the OUTI command affects the C flag. AA> 2All ;) !!!! AA> !!! But you can’t tell from the manual ;) DL>> the pattern could not be found AA> I almost succeeded, but not completely. LD A,(HL) ADD A,L AA> By the way, do you know that Speccy has a 2-bit DAC on the FE port? ;))) Did you get hold of a branded spec somewhere? AA> By the way, do you know what quartz frequency the Speccy 48 has? AA> 2All: Does anyone know anything about ULA??? Write a letter to Sinclair research. 8-)) They say it’s on the internet ;)evil Vitalik AKA Dark/X-Trade

Hi, Alexander! 10 Dec 98 Alexander Ageev wrote to Dmitry Lomov: AA> 2All: Does anyone know anything about ULA??? A year ago I interviewed a man who “broke” ULA on a proprietary Speck, and then synthesized it using powder. Later this became "Lvovsky" option." So, according to him, the temporary temporary shelter "ULA" of the "Lviv version" is one in one repeats the temporary ULA 48th ZX! And again, according to him, “Moscow 48”, completely repeats "Lviv 48"! So look for the "Moscow" scheme and figure it out! ;) Best regards, Vladimir.

Hi, Alexander! 17 Dec 98 Alexander Ageev wrote to Vladimir Klymus: VK>> A year ago I interviewed a person who “broke” ULA on a proprietary VK>> Speck, and then synthesized it using powder. AA> If it's not a secret, who is this person? Look for the sixth "Optocoupler" - this interview is there. Truth without technicalities details, but it will still be interesting. In general, we found three creators of "Lvov" - one lives now in Mexico, one in Belarus, one in Lvov, a deputy, a big shot in the Polytechnic Design Bureau. Now it is too late to extract any technical information from them (more ten years have passed), but he confirmed that his computer repeated the brand name iron. VK>> So look for the “Moscow” diagram and figure it out! ;) AA> ok. AA> 2All: Does anyone by any chance have the “Moscow 48” or “Lvov 48” scheme? I would help you, yes, but I live in Lvov, and you live in St. Petersburg... 2All: If anyone is interested in the history of the creation of the _first_ domestic Spectrum, I strongly advise you to find "Optocoupler" #6 and #15 - there are two very wonderful interviews. Best regards, Vladimir.