Sprinter Power (2Marat)
ZXNet echo conference «zx.spectrum»
From Andrew Savichev → To All 22 January 1998
Hi, All!
Greetings, O Marat!
AS> There is, of course, another option - to make your own processor based on logic or (which
AS> is much simpler, but also more expensive for buyers) to emulate the z80 on a 16/32r.
AS> ARM processor (which, according to experts, “puts the stump-200 in its belt”
AS> Emulation will of course “gobble up” up to 80% of its performance, but still, in the
AS> result we will have a 40-60 mips z80 processor, for which the advanced
AS> Sprinter graphics will be a “trivial task”.
MF> Maybe we can just use an emulator, huh? :)
The question is certainly interesting ;)
So, what does z80 emulation with RISC processor microinstructions give us?
Purely economically:
1) greater freedom for hard makers and soft makers - they make the architecture as
_they need_, and not as someone decided for them in California :)
2) and the price of the board will be lower, if only because in addition to the
processor, other devices are emulated: video controller, music controller,
arithmetic controller, IDE controller, etc. etc. Those. if in PC-X everything
is aimed at “squeezing the power out of this chip to the fullest” - then we don’t
need it. We need to reduce the price as much as possible - one, accelerate the Spectrum
- two, ensure performance in advanced graphics modes - three,
and MOST IMPORTANTLY - ensure compatibility withprevious architectures -
four.
Therefore, if 1/5 of the miracle percent goes to the actual acceleration of the z80, mind you,
increasing its performance by 8-10 times compared to the Sprinter! and
20-25 times compared to Scorpio, and the remaining 4/5 will save money
hard makers (and, accordingly, I hope, buyers) on wiring/
production of printed circuit boards, on obtaining obsolete equipment,
everywhere discontinued - then the “price” will not seem too high.
Ideologically:
Independence and freedom! This will be the coveted Russian computer, which
was invented and manufactured in Russia! And besides, it’s quite “at the level”, because having
the performance of DX4-100 and higher on native Spectrum programs, you must agree,
is not so bad! Just don’t try to increase memory, create more caches
and generally chase the Beam architecture! After all, in this case it will turn out just
Bim-Bom with all the ensuing consequences.
>
AS> ZX-Windows will become a reality!
AS> With its help, Spectrum will finally break into schools, boarding schools and disabled children (and this, as you guessed, is hundreds of thousands of new users!!!)
AS> And it will really be Spectrum XXI century!
MF>...heroine mothers, racketeer brothers and bloodsucking ministers...
Of all of the above, perhaps onlyfirst ;) ... because saving $300 on hardware and up to $1000 a year on SOFTWARE is very, very interesting for them. However, if software appears that is not on Bima, but
is quite “drool-generating”, then who knows, who knows ;)
And for EVERY school (30 computers) this already turns into savings of $10,000 on
hard and up to $5,000 on software (the latter, as you understand in the case of
civilized byte trading). Less only if they purchase
LAN, but this is a big expense for software.
Sincerely, Andrey Savichev / CGS
From Marat Fayzullin → To All 27 January 1998
Naxren im eto ne nado, izvinite uzh. Oni ispol'zuyut tu arxitekturu chto
deshevle, dostupnei, na kotoruyu est' sredstva razrabotki, chto nynche
avtomaticheski oznachaet PCyuk. This is sad no fakt.
Esli zhe delat' "kak im nado", to Z80 s ego kucym naborom registrov i 64kB
adresnym prostranstvom seichas malo kogo interesuet. MIPS ili PPC
implementiruyutsya na tom zhe mikrokomandnom processore gorazdo
effektivnee i dayut bol'she vozmozhnostei.
Da, kstati, "RISC" i "mikrokomandnyi CPU" - eto dve bol'shie raznicy.
Nikogda ne upotreblyaite ix kak ekvivalenty, narod Vas podnimet na smex.
ARM - eto imenno RISC. Na nem nel'zya vshivat' novye komandy, po krainei
mere naskol'ko ya znayu. Na ARMe Vam pridetsya pisat' obychnyi emulyator -
ili perekoompilyaciei v ARM komandy, ili interpretaciei.
: 2) and the price of the board will be less, if only because they are emulated except