PAGING PORTS of ZX / CLONES

[VELESOFT]

Is this info true ?

Pentagon 128 kB ond ZX Spectrum 128 / +2
port 7FFD: (adressation 0xxxxxxx xxxxxx0x )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = unused

Pentagon 512 kB
port 7FFD: (adressation 0xxxxxxx xxxxxx0x )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = bank 3 ;256 kB memory
D7 = bank 4 ;512 kB memory

Pentagon 1024 kB
port 7FFD: (adressation 01xxxxxx xxxxxx0x )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = bank 5 ;1024 kB memory (if D2 of port EFF7=0)
D6 = bank 3 ;256 kB memory
D7 = bank 4 ;512 kB memory
port EFF7: (adressation 1110xxxx xxxx0xxx )
D2 = 1 - set 128 kB mode
0 - enable 1MB memory
(if D2 of port EFF7=1 then D5 of port 7FFD is used for disable paging)
D3 = 1 - disable rom and connect ram page 0 in adress space 0-3FFF

ZX Spectrum 128+2A / +3
port 7FFD: (adressation 01xxxxxx xxxxxx0x )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = unused
port 1FFD: (adressation 0001xxxx xxxxxx0x )
D0 = 1 - disable rom and allram mode
D1 and D2 set layout of ram pages if allram is set (see +3 manual)

Scorpion 256 kB
port 7FFD: (adressation - 01xxxxxx xx1xxx01 )
(adressation in REALSPECTRUM emul is also different )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = unused
port 1FFD: (adressation - 00xxxxxx xx1xxx01 )
D0 = 1 - disable rom and connect ram page 0 in adress space 0-3FFF
(UNREAL SPECCY emulator set after OUT 1FFD,1 ram page 0 to low 16kB, but REALSPECTRUM emulator set ram page 8 to low 16kB )
D4 = bank 3 ;256 kB memory
D6 = unused
D7 = unused

Scorpion 1024 kB
port 7FFD: (adressation - 01xxxxxx xx1xxx01 )
(adressation in REALSPECTRUM emul is also different )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = unused
port 1FFD: (adressation - 00xxxxxx xx1xxx01 )
D0 = 1 - disable rom and connect ram page 0 in adress space 0-3FFF
D4 = bank 3 ;256 kB memory
D6 = bank 4 ;512 kB memory
D7 = bank 5 ;1024 kB memory

KAY 256 kB - ( compatible with SCORPION 256kB )
port 7FFD: (adressation - 01xxxxxx xxxxxx01 )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = unused
port 1FFD: (adressation - 00xxxxxx xxxxxx01 )
D0 = 1 - disable rom and connect ram page 0 in adress space 0-3FFF
D4 = bank 3 ;256 kB memory

KAY 1024 kB
port 7FFD: (adressation - 01xxxxxx xxxxxx01 )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = bank 5 ;1024 kB memory
port 1FFD: (adressation - 00xxxxxx xxxxxx01 )
D0 = 1 - disable rom and connect ram page 0 in adress space 0-3FFF
D4 = bank 3 ;256 kB memory
D7 = bank 4 ;512 kB memory

ZX PROFI 1024 kB
port 7FFD: (adressation - 0xxxxxxx xxxxxx0x )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = unused
port DFFD: (adressation - xx0xxxxx xxxxxx0x )
D0 = bank 3 ;256 kB memory
D1 = bank 4 ;512 kB memory
D2 = bank 5 ;1024 kB memory

ATM 1 512 kB
port 7FFD: (adressation )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = unused
port FDFD:
D0 = bank 3 ;256 kB memory
D1 = bank 4 ;512 kB memory
D2 = unused

ATM 1 1024 kB
port 7FFD: (adressation )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = unused
port FDFD:
D0 = bank 3 ;256 kB memory
D1 = bank 4 ;512 kB memory
D2 = bank 5 ;1024 kB memory

[Advertiser]

[molodcov_alex]

ZX PROFI 1024 kB

port 7FFD adressation - 0xxxxxxx xxxxxx0x
port DFFD adressation - xx0xxxxx xxxxxx0x

---------- Post added at 21:08 ---------- Previous post was at 21:05 ----------

KAY 1024 kB

port 7FFD adressation - 01xxxxxx xxxxxx01
port 1FFD adressation - 00xxxxxx xxxxxx01

[VELESOFT]

And what is adressation of AY ports for all this clones ?
Porf FF adressation ?
CACHE adressation ?
Port FE adressation ?

I can implement all this ZX clones to my PROFI INTERFACE:

http://zx.pk.ru/showthread.php?t=11479

[Black_Cat]

KAY 1024 kB
port 7FFD: (adressation in UNREAL SPECCY - 01xxxxxx xx1xx10x )
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = bank 5 ;1024 kB memory
port 1FFD:
D0 = 1 - disable rom and connect ram page 0 in adress space 0-3FFF
D4 = bank 3 ;256 kB memory
D7 = bank 4 ;512 kB memory

And what is adressation of AY ports for all this clones ?
Porf FF adressation ?
CACHE adressation ?
Port FE adressation ?

Guide to the ZX Spectrum ports

[VELESOFT]

Adressation of attribute port FF:

ZX Spectrum 16/48/48+/128/+2(grey):
xxxxxxxx xxxxxxxx

ZS SCORPION 256/1024:
xxxxxxxx xx1xxx11

-------------------------------------

Adressation of ula port FE: (border/keyboard/tape)

ZX Spectrum 16/48/48+/128/+2(grey)/+2A/+3, KAY , PENTAGON 128, ZX PROFI:
xxxxxxxx xxxxxxx0

ZS SCORPION 256/1024:
xxxxxxxx xx1xxx10

[Black_Cat]

Scorpion ZS256 Turbo+:

#FF xxxxxxxx xx1xxx11
#FE xxxxxxxx xx1xxx10

Scorpion ZS256:

#FF xxxxxxxx xx1xx111
#FE xxxxxxxx xx1xx110

Computer ZS SCORPION 1024 has never been produced. This is an amateur expansion.

[SAM style]

ZS Scorpion 256 turbo+ (i'm not sure about other Scorpions)
1FFD: D1 - select shadow rom (moa service)

[m.d.]

Early versions (1.xx) of Pentagon 1024SL have configuration ports mostly like KAY-1024 (some memory testers work fine with such assumption) except additional bits:

Pentagon 1024 1.xx
port 7FFD: (adressation - 01xxxxxxxxxxxx01, write-only except r/w in TR-DOS mode)
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram
D4 = rom
D5 = disable paging
D6 = unused
D7 = bank 5 ;1024 kB memory
port 1FFD: (adressation - 00xxxxxx xxxxxx01, write-only)
D0 = 1 - disable rom and connect ram page 0 in adress space 0-3FFF
D1 = 1* - enable "protected mode": port 1FFD and bit 7 of port 7FFD are accessable only in TR-DOS mode
D3 = 1 - select shadow ROM (unused first page of 64k ROM)
D4 = bank 3 ;256 kB memory
D5 = 1* - lock port 1FFD and bit 7 of port 7FFD
D7 = bank 4 ;512 kB memory

* - this features can be disabled only by hardware reset.

[Black_Cat]

ROM / RAM managetment in the CPU0 window:

- for the all Scorpions and Pentagon-1024SL v1.xx and all KAY's and ZXM-Phoenix:

D0 #1FFD CPU0: 0-ROM, 1-RAM0 - this method of control has been supported in software.

- for the Pentagon-1024SL v2.xx:

D3 #EFF7 CPU0: 0-ROM, 1-RAM0 - this method of control has no support in the software.

ZS Scorpion 256 turbo+ (i'm not sure about other Scorpions)

This is true for all the Scorpions, and ZXM-Phoenix.

Unconditional call Service ROM page for the all Scorpions and ZXM-Phoenix:

D1 #1FFD SERVICEROM>CPU0: 0-off, 1-on

ROM disk for the Pentagon-1024SL v1.xx and all KAY's and ZXM-Phoenix:

A14"ROM Change Adress - D4 #7FFD
A15"ROM Change Adress - D3 #1FFD

Recommended control RD/WR RAM in CPU0 of the future computers:

|D0#1FFD|D3#EFF7 r/wCPU0 MANAGETMENT - determines the mode of operation and type of memory in the window CPU0:
|_0 _____|_0 - rdROM(or virtual ROM*)
|_0 _____|_1 - rdROM(or virtual ROM*) & wrRAM
|_1 _____|_0 - r/wRAM0
|_1 _____|_1 - rdRAM0

Recommended control ROM disk in future computers:

D1 #1FFD SERVICEROM>CPU0: 0-off, 1-on - unconditional call Service ROM(or virtual ROM*) page.

A14"ROM Change Adress - D4 #7FFD
A15"ROM Change Adress - D3 #1FFD
A16"ROM Change Adress - D2 #1FFD
A17"ROM Change Adress - D6 #1FFD
A18"ROM Change Adress - D5 #1FFD

* - virtual ROM page - this is the image of ROM, located in a protected area of RAM.

[VELESOFT]

And what about ATM TURBO 2+ ports ?