
Date : May 23 '95, 20:55                                                       
From : Konstantin Winogradow                                  2:465/24.4
To   : George Shepelev                     
Subj : ⠭ ZX                                                          


           ਢ, George!
  ⢥  訬  ( ᮦ p 쬠  襫 ;-(
p p⮢  -1:

Port 0FEh (write with A0=0) : - BORDER
  A7(0) - CPUS (ON)
  A6(0) - RG0  p p p (.)
  A5(0) - RG1 
  A3(0) - BORDER INTENSITY
Port 0FBh (read with A2=0)  : - Printer READ
  A7(1) - CPSYS ON   pp     CP/M p
  A7(0) - CPSYS OFF 
  D6    - ULINE - ''  ⥫.
  D7    - BUSY - pp 
Port 0FBh (write with A2=0) : - Printer WRITE ( ᭮..)
  D0-D7 - CENTRONICS DATA
  A7(0) - STROBE
Port 7DFDh (write with A15=A9=A1=0) :
  D0-D5 - bgrBGR (PALETTE) p p
Port 7FFDh (write with A15=A1=0): - SYS SINCLAIR-128k ( ᭮..)
  D0-D2 - extended RAM pages pp  (128)
  D3    - screen 2
  D4    - ROM 1
  D5    - lock Sinclair 48k
Port 0FDFDh (write with A9=A1=0): - SYS
  D0,D1 - expanded RAM pages p pp  (512)
  D2    - ROM DISC 祭 㫥 p 27010
  D3    - TON pp襭 p  ⥫.
  D4    - TNAB p ⥫䮭 p
Port 7FFDh (read withA15=A1=0): - TLRD
  D0    - Bell p  ⥫.⠭樨
Port 7DFDh (read with A15=A9=A1=0): - ADRD
  D0-D7 - ADC read ⥭   -pp⥫, 뢮    
 p CENTRONICS- (port 0FBh)
Port 0FFFDh & 0BFFDh - p .pp
External Port : IN & OUT with A2=A0=0 p pp (ppp  ..)
  ADDRESS - CENTRONICS DATA
  DATA  - D0-D7
------------------------------------
  p:
RG0=1 & RG1=0 - p饭 ﭨ
RG0=0 & RG1=0 - 320x200 祪
RG0=0 & RG1=1 - 640x200 祪
RG0=1 & RG1=1 - p Sinclair
------------------------------------
  p SPECTRUM 訩 p p⠢ p 0FDFDh - p-
p (512)
   p  p   128:
Ŀ
 D1  D0 -  p                                                   
Ĵ
 0   0   0 ⠭p⭮ pp  p㬠 128         
 0   1   1 p    8  0Fh                          
 1   0   2 p    10h  17h                        
 1   1   3 p    18h  1Fh                        

  p  p p㬠   p᭮  pp⢮
pp 筮 ⥫쭮  p-128  p 49152 p
ᯮ짮 pp  㤮 짮  䨧᪨
p p,  , .. 10h=0, 11h=1  ..
  pp p祭 p   ⠪ :
  Pages:   PUSH BC
           PUSH AF
           LD BC,0FDFDh
           RRA
           RRA
           RRA
           AND 3
           OUT (C),A ;p 
           POP AF
           AND 7
           OR 10h
           LD BC,7FFDh
           OUT (C),A ;p p
           POP BC
           RET
 pp, p  ⠭  p p  訬 ⮬ 0FDh
( ⨯ OUT (0FDh),A     OUT (0Dh),A (!) ) p 
⮫쪮 p,     ᫥ 祣 ..........
 p     pᯮᮡ  pp, ᯮ
⠪ p  ⥫쭮 p樨 (p⭮) p⮢+p
0FFh (p ⮬ ⠭  ᮢ⨬  p⠬ p CP/M 
㧯pp).
 H   쭠 , ⠪- 祭 p᭮ ᯮ짮 ROM DISC-
 (27010), - pp⥫,   ⮬  .

               C 㢠, Konstantin.

PS:  p -  쬠 :-)
PPS:  ᠭ ⭮ ⮫쪮  -1(pᨨ 4.10-5.20), p2  -2
 ᮫⭮ p pp...

...     A Smith and Wesson beats four aces.
--- GoldED 2.50.Beta5+
 * Origin: World Systems, (2:465/24.4)
