PAGING PORTS of ZX / CLONES

[Black_Cat]

And what about ATM TURBO 2+ ports ?

Ports identical ZX +128.

[VELESOFT]

Ports identical ZX +128.

ATM TURBO 2+ use 1MB memory and some extra ports.
ZX 128 use only 128kB memory.

[Black_Cat]

ATM is not a clone of the ZX Spectrum, although in one of the modes and is compatible with ZX +128. Mode extended memory is not intended for use with the ZX Spectrum SOS. Initially, this mode is intended solely for work in CP/M. Developers ATM did not expect to work in a mode ZX Spectrum with a RAM capacity more than 128k.
In Sam Coupe, too, there is a compatibility mode with the ZX Spectrum 48, but this does not mean that this computer is a clone of the ZX Spectrum.

[CHRV]

ATM is not a clone of the ZX Spectrum, although in one of the modes and is compatible with ZX +128. Mode extended memory is not intended for use with the ZX Spectrum SOS. Initially, this mode is intended solely for work in CP/M. Developers ATM did not expect to work in a mode ZX Spectrum with a RAM capacity more than 128k.

Velesoft, Sorry!
BK0010 not competent in ATM turbo. He is (BK0010) very religion man (adept of Nemo religion) and give to You false information.
If You have question for ATM and other clones please wrote me by email or on forum by next reference http://dlcorp.ucoz.ru/forum .
Good luck!

P.S. Not dispute with BK it very no point.

[Black_Cat]

BK0010 not competent in ATM turbo. He is (BK0010) is very religion man (adept of Nemo religion) and give to You false information.

Unfortunately words CHRV not reflect reality. He mistakenly believed that the changes made in the scheme of ATM converts this computer in ZX Spectrum. He believes in it as a religious dogma. But the facts suggest otherwise. He (CHRV) is wrong and is afraid to admit their mistakes. In contrast CHRV my knowledge based on facts, not delusions. ATM has never been a clone of the ZX Spectrum, and never will be despite the fact that CHRV believe in miracles.

P.S. Persuade such religious adherents as CHRV useless, they ignore the facts.

[VELESOFT]

ATM is not a clone of the ZX Spectrum, although in one of the modes and is compatible with ZX +128. Mode extended memory is not intended for use with the ZX Spectrum SOS. Initially, this mode is intended solely for work in CP/M. Developers ATM did not expect to work in a mode ZX Spectrum with a RAM capacity more than 128k.
In Sam Coupe, too, there is a compatibility mode with the ZX Spectrum 48, but this does not mean that this computer is a clone of the ZX Spectrum.

O.K. But all machines with real Z80CPU, similar speed as 3.5MHz, all ZX ports and compatible memory layout is ZX COMPATIBLE or ZX CLONE (for me ). Exist any russian ZX clone ? CLONE = 100% copy = identical
No, all "ZX based computers" is only compatible with ZX, but CPU timing, screen timing, ports adressation and ZX bus is different (only similar). For example ZS SCORPION, etc. But some people sign all this computers as "ZX CLONES". Ok, it's not important for me. If any computer use real Z80CPU and can run in ZX mode, this is same. My SPRINTER 2000 is also usable in ZX mode after start up

I have real SAM COUPE and several years experiences with this hardware. If you remove rom chips from SAM COUPE and replace this with ZX ROM then will after start machine in ZX mode. ZX resolition 256x192, same ports is used, etc...

I do not care if ATM TURBO 2+ is designed as ZX clone or not. I just want to emulate the paging ports only. (for possibility using trdos with FDC ports emulation on real ZX)

[Advertiser]

[Black_Cat]

I do not care if ATM TURBO 2+ is designed as ZX clone or not. I just want to emulate the paging ports only. (for possibility using trdos with FDC ports emulation on real ZX)

In memory manager ATM-2 uses of registry RAM 128 bits(16x8). Your CPLD is sufficient to accommodate this RAM?

[VELESOFT]

In memory manager ATM-2 uses of registry RAM 256 bytes. Your CPLD is sufficient to accommodate this RAM?

256 bytes ? What is access to this bytes ?
It's only 256 ports used as memory 256 bytes ?

[Black_Cat]

Sorry, I was wrong. Correct: 128-bit (16x8)

[Vadim]

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

ZX PROFI 1024 kB
port 7FFD: (adressation - 0xxxxxxx xxxxxx0x )
named on Profi CMR0
D0 = bank 0 ;128 kB memory
D1 = bank 1 ;128 kB memory
D2 = bank 2 ;128 kB memory
D3 = videoram **
D4*= rom (rom14)
D5 = disable paging
D6 = unused
D7 = unused

port DFFD: (adressation - xx0xxxxx xxxxxx0x )
named on Profi CMR1
D0 = bank 3 ;256 kB memory
D1 = bank 4 ;512 kB memory
D2 = bank 5 ;1024 kB memory
D3 = select the window in the address space for mapping memory pages
0 - adress C000 (ZX-Spectrum 128 standart);
1 - adress 4000 Then the address c000 will bank 07
D4 = disable rom and connect ram page 0 in adress space 0-3FFF
D5*=
0 - port addresses (1F, 3F, 5F and 7F) are used to access i8255A (KP580BB55)
1 - port addresses (1F, 3F, 5F and 7F) are used to access 1818WG93
D6 = if D4=1, 8000..C000 =page6 (pixels 512x240)
D7 = screen mode 512x240 (extended video mode used in CP/M)



(*) ZX-Profi 3+ (board ver 5.xx) unlike ZX-Profi (board ver 3.xx)
use extended address space which changed the port addresses of
the expanded peripheral devices.
Combinations of these bits select the list of available ports.
Ie choose a method of addressing.
1) rom14=0 addressing as a ver 3.xx. Bit D5(dffd) selects 8255 (0) or VG93 (1)
The rest of the extended peripherals are not available.
2) rom14=1 & D5(dffd)=0 Addressing as a ver 5.xx. Set accessible peripheral expansion ports:
i8253, i8251, hw clock (mc146818), IDE interface. i8255A &1818VG93 have their addresses and ports are available at the same time.

**
3) In the enhanced video mode (512x240) this bit so chooses display options:
= 0 - pixel page 06, attributes (for each byte pixels) - 58 (72 in octal)
= 1 - pixel page 04, attributes (for each byte pixels) - 56 (70 in octal)
And also if you set bit 4 in DFFD (CMR1), then register CMR0 unlocked.
Ie it cancels bit 5=1 CMR0.