[zxspectrum] Re: NEWZZZZZZZZ
- From: Mario <mario.prato@xxxxxxxx>
- To: zxspectrum@xxxxxxxxxxxxx
- Date: Thu, 18 Jan 2007 15:16:25 +0100
Proprio oggi ho scritto a Pavel "Zilog", autore della Divide per farmi chiarire
alcune cose sull'hardware, mi sembra una persona molto disponibile e preparata,
credo che questa storia delle Divide non ufficiali non gli sia piaciuta
affatto..
Purtroppo anche in questo mondo di appassionati e di nicchia c'e' chi vuole
speculare a tutti i costi, e questo e' il motivo per il quale non ho aggiornato
il mio sito con le novita', troppa gente mi ha contattato solo per fare soldi
dal mio lavoro. :(
e' un mondo difficile (cit.)
ciaoo
On Thu, 18 Jan 2007 13:42:36 +0100
"Stefano" <flydream@xxxxxxxx> wrote:
> MbIDE: la divIde da collegare alla Mb-02+ (non so se possa interessare a
> qualcuno visto che tale interfaccia si trova solo sui didaktik)
> http://www.raww.org/index.php?name=News&file=article&sid=2452
>
> Un interessante fatto a proposito di DivIDE (copio incollo da raww.org)
> In the last days somebody at pandora.cz spotted a Polish eBay seller who is
> selling divIDEs for about 60GBP each. Except this quite high (damn high)
> prize there is one more intersting thing on it. These divIDEs with extension
> by Jarek Adamski with more EEPROM and more SRAM (from 128 to 512kB) irritated
> the original author, Zilog. He thinks this extension is not so clean and
> smart and has some suggestions to it:
> "i think that this breaks one important compatibility-case, let's
> imagine:
> - running software which was snapped while in 128k rom - the firmware
> will page the proper rom1 as requested in the snapshot, but due to your
> modification, the off-area won't unmap. you must use at least MAPCOND as
> well (= never block /M1 when we're already mapped coz we must unmap
> yet). personaly i think the 128k BASIC is bad, and the cost of
> 128k-basic workarounds is higher than the resulting usability.
> btw. the usage of unused bits of control port isn't very lucky - the ram
> isn't visible equally for each rom page, so there exist "four parallel
> sub-divides" instead of one big and powerful divide.
> please consider that the combination 11xxxxxx, sent to control port, is
> slightly nonsensual.
> so, it would be wise to map the extension to this "magic combination"
> instead."
> This could cause incompatibility between further divIDEs made according to
> the original Zilog's concept (and the "right" RAM expansion) and Jarek's
> project, bacause the RAM expansions are planned (and widely discussed) in the
> Czech Speccy community. Time will show how the guys solve the problem, one
> thing is clear - you can't be sure you own the "right one" since now :(
> Alcune informazioni tecnice per la DivIDE:
> http://8bit.yarek.pl/interface/zx.divide/
> Sempre di DivIDE e di Z88Dk Sprite pack si parla anche su ZX Magazine
> http://magazinezx.speccy.org/index.php?revista=14
> (la prima parte di Z88dk sprite pack si trova qui
> http://magazinezx.speccy.org/index.php?revista=13 )
>
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