
                                Shadow RAM II
                                ~~~~~~~~~~~~~

  "" shadowram 諮 㦥  ६,  ⥬ ⠫
 ⠪  ᭮.

     㡫,  ().

 ࢮ   ਢ ᠭ  ਬ ,  ࠫ 
ᮡ⢥ .
  ⨯ ࡮, 襩   ⮣, () 筮
࠭ --    ⥫᪨ FX, HX, VX,  ..
 ⨬ ﬨ   ࠧ  뢠,
 ⮬ 뫠 ॡ ঠ  㣨 稯.

   諠 ண,   shadowram  㧪
  video bios ᪨ 䮭⮢ --   ᠬ ⠪   ᢮ , 
 ⮩ ண 襫 ,  ঠ  50 ࠧ 稯⮢.
  ᯠᨡ,  , . ;-)

஬ ⮩ ண   ࠡ ᯮ짮 প 稯⮢  
- 猪,  ࠡ⠫ ⥬ ய뢠  shadowram 
᪮쪮 㣮 .

                               ShadowRAM
                             ~~~~~~~~~~~~~~~~~~~

 ᥬ ,  ⮣  .

    誨 (   誨 )  堭,
騩  䨪஢  
(C000-C800x16k,...,E000-F000x64k,etc.)
⮡ࠦ ᮤন ᮢ     .

᪮   堬 ᮢ ⥫쭮 ,
     ( ᫮ map)
⨢, ⥬ ᮤন ᮢ()   ⨢,
     ⮩ ⨢ 뢠,   孮
- ᥩ      뢠 ShadowRAM.

                                   
                                  ~~~~~~~~~

 ᮡ⢥ ....
  ᬮ 䠩 _code1  _code2 -- ⠬  ᥣ,
  ᬮ   襮ᠭ ண.

 ,   稯  3 ணࠬ,
稭  sh<n>_,  <n> --   稯,
 / 稯⮢ ।  䠩 _names.

 ன ணࠬ  䨪ᮬ ⨯ _c, _e  _f.
 ,  㪠 ணࠬ, ᪮॥ ᥣ,
ࠡ  ᥣ⠬ C000,F000  ..

1. ணࠬ 樠樨/஢ન. (ਬ sh1_init_c)

 ᥣ  ணࠬ 뢠 ﭨ  ॣ஢,
⢥     ᮮ⢥騥 ᥣ.
  ணࠬ ⥫쭮!
   ࠭ 室 ﭨ ॣ஢  ᫥饣
⠭ 3 ணࠬ.

ணࠬ 頥 AL=0 ᫨  (  稯   ),
 頥 AL=1 ᫨   浪.
  頥 AL=1   砥, ਬ mov al, 1 / ret.

2. ⨥ ShadowRAM  . (ਬ sh36_open_e)

 ணࠬ  ﭨ ॣ஢, ࠭ 1 ணࠬ,
 뢠/࠭  ᠬ, 㡨ࠥ ( ⠭) 㦭  
ய뢠  祭 ॣ஢ ⭮  .

 (᫨ 稯 )    ᮮ⢥騩 ᥣ
(ਬ  C000).

3. ⨥ ShadowRAM  . (饭  室 ﭨ)

 ணࠬ  ﭨ, ࠭   । ணࠬ,
 ய뢠  ⭮  .

                                 
                              ~~~~~~~~~~~~~~~~~

 ᥬ ,  ⮣  .

. ய뢠 ᥡ  shadowram. 頥 .
墠뢠 饭  ⠬.  , ?

  ᫨ ,
   shadowram-  -   ਬ.

                                  
                                  ~~~~~~~~~~
 ...
ᥭ ,  ७   ஢.
        ࠡ⠥.

  ஬ 31  ஡ ᠭ  ।饩   shadowram.

  49 㤨⥫쭮 宦  11. ࠢ 49  F000,  11
 C000.  -  ᠬ.

E000 -  ⨯ ᥣ   ⮯.

   shadowram-,  뢠  .

祢,  , ਯ  猪 (_code2)  ࠭ ਯ 
⮣  SFONT,      , ⮡  C000 ᤥ F000.

 ᮡ⢥  ,   ⥫ ᪠.
뭥     㪠. ;-)))

                                                                     Z0MBiE

                            http://z0mbie.cjb.net
