Deja Vu #01
30 июня 1997 |
|
Over the hill - The rich also cry?
(C) 1996 IMP / DREAMAKERS / RUSH. On electronic newspapers ECHO # 01. __________________________________________ * RICH also cry! ---------------------- All have been aware of the problems arising due to small differences in domestic Spectrum of their branded counterparts (in Basically, this is the problem of synchronization of the image). But few people think about what problems our (SNGshnye) encoders to create a branded user machines. About I told this well-known in our JORDAN edges of EXODUS (Poland). Here I translated an excerpt from his letter: ... We have a lot of problems with all software from the former Soviet Union. All this is due to a number of differences PENTAGON from the original SPECCY. First, the Pentagon has no SLOW RAM (slow memory), and secondly, almost all owners This machine uses the port # FD for switching the memory banks without having to install the second Bit 'A' register. Of course we do all our best and try to adapt all the programs that we receive from the CIS, for normal operation at the more popular in Western Europe models than 2 or 128 +. Maybe you do not know this, but Spectrum 128 + and 2 are not popular since 1988, when the light appeared Model 3, +2 A and 2 B. In these versions of the Spectrum the second bit MUST be set if you want to switch the bank. This also applies to Timex'a, SCORPION'a and DIDAKTIK M case. Of course this is small change (the second bit) will not harm the normal operation of programs to 128 + and +2. Everything will work just fine. The next question, as I wrote, it's no SLOW RAM. If you want to that your program worked with the full rate on the original Spectrum, the put the time-eating code (zhruschy time code) only in FAST RAM (fast RAM). Too thing to do and a table of interrupts. And now I write to you particularly 'Iron' on some computers that were called by me earlier. . . In +3 / 2 A / 2 V/128 + / 2 clock frequency in FAST RAM is equal to 3.5469 MHz. In SLOW RAM is is equal to 2.6602 MHz (nearly 25% slower than FAST). Further, in the +3 / +2 A / +2 B FAST RAM on pages 0,1,2,3 and SLOW RAM in 4,5,6,7. In 128 + / +2 FAST RAM to the page 0,2,4,6 and SLOW RAM in 1,3,5,7. Unfortunately, there's more 'surprises' for you. In models 3 / +2 A / +2 In all the 'block' mnemonics (LDIR type, etc.) when sending data between SLOW and FAST memory, with nearly 10% faster than the 128 + and +2. And finally, while ULA chip builds the upper, left, right and bottom BORDER, all the mnemonics in the SLOW RAM run at full speed. Everything is a little weird, is not it? And Finally, I will write to the memory card (I think All of you know it, and so, but still ...). . # C000-# FFFF banks 0-7 FAST and SLOW. # 8000 - # BFFF Bank 2 always FAST. # 4000 - # 7FFF Bank 5 is always SLOW. # 0000 - # 3FFF ROM 0-3 is always FAST. . Number LDIR in between interruptions (From a SLOW SLOW RAM):. . y 2 A / +2 B +3 = 3017. y +2 / 128 = 2698. y 48/TIMEX2128 = 2622. . ..... For the 'gifted' I will explain the meaning of above. Much of what done at the Pentagon on branded machines, or do not work at all or not 'ONE FRAME '(ie does not fit into one interrupt). So make your choice, gentlemen programmers - or you dovolstvuetes local Backstage, either accept the 'game' and perhaps soon, and the European scene will be at your feet! I note that our (DMS / LAVE / RUSH) demo 'MENTAL MASTURBATION ',' VIBRATIONS ',' ECSTASY 'already found its audience (Unfortunately, all except 'VIBRATIONS' had still been abused, ie, adapted). I should note that in recent Interest in our stage is much increased. And it's no wonder - where else as not in the CIS there is a lot of GAME and DEMO makers for SPECCY? By the way, sinkleristy 'from behind a hill' is hoteli to have our games UFO 1,2, DOOM, and etc. But, unfortunately, our dear Game-makers nor how many are not interested in support of the foreign market software and in vain! ... I understand that the games matter The situation is not easy, but here as a demo, where compatibility problems are most severe, then the output is. And it is simple as all brilliant - enough to test 'Iron' and reconfigure the effects of a given type of machine, naturally, some things will not look as luxurious as it would look like well into the Pentagon. And of course, have to forget about MULTICOLOR'e, because set it under the brand name car without it, I do not really. END ...
Other articles:
Similar articles:
В этот день... 21 November