ScorpEvo (Scorpion ZS на базе ZX-Evolution)

[VELESOFT]

Вот сравнительная раскладка рекомендуемая к использованию программистами для Пента4Мб и Скорпо-Кая4Мб:

|Pent|S-KAY|
|A19’ |A21’ |D5 #7FFD
|A18’ |A20’ |D6 #7FFD
|A17’ |A17’ |D7 #7FFD
|A20’ |A18’ |D4 #1FFD
|A21’ |A19’ |D7 #1FFD

= chaotic memory pages layout. Best way is add one port for switching memory paging = better compatibiity with original software.

I use in my PROFI interface this feature:




Memory paging (ZX clone type) is selectable via OUT 495,x or in menu. Position of logical ram pages 0-63(1MB ram) are same in all ZX modes.

[Black_Cat]

= chaotic memory pages layout.

Yes, it is a Russian tradition!

|S256|Kay |P512|Pv2.2|P4Mb|S-Kay4Mb|
| _-_ | _-_ | _-_ |A17’ |A19’ |A21’ |D5 #7FFD
| _-_ | _-_ |A17’ |A18’ |A18’ |A20’ |D6 #7FFD
| _-_ |A19’ |A18’ |A19’ |A17’ |A17’ |D7 #7FFD
|A17’ |A17’ | _-_ | _-_ |A20’ |A18’ |D4 #1FFD
| _-_ |A18’ | _-_ | _-_ |A21’ |A19’ |D7 #1FFD

[VELESOFT]

Yes, it is a Russian tradition!

|S256|Kay |P512|Pv2.2|P4Mb|S-Kay4Mb|
| _-_ | _-_ | _-_ |A17’ |A19’ |A21’ |D5 #7FFD
| _-_ | _-_ |A17’ |A18’ |A18’ |A20’ |D6 #7FFD
| _-_ |A19’ |A18’ |A19’ |A17’ |A17’ |D7 #7FFD
|A17’ |A17’ | _-_ | _-_ |A20’ |A18’ |D4 #1FFD
| _-_ |A18’ | _-_ | _-_ |A21’ |A19’ |D7 #1FFD

Exist any software with support KAY or P4MB memory ?
I know only TR-DOS with ramdisc for KAY 1MB memory.

[Black_Cat]

Best way is add one port for switching memory paging = better compatibiity with original software.

This is not the best way. Software compatibility when using modified memory drivers exceeds 100%

---------- Post added at 17:53 ---------- Previous post was at 17:44 ----------

Exist any software with support KAY or P4MB memory ?

For KAY - ISDOS, TR-DOS, and many other system programs that use the RAM disk.

[VELESOFT]

This is not the best way. Software compatibility when using modified memory drivers exceeds 100%

Theoretically is absolutly unnecessary support paging bits from other ZX clones. As I know all software with extended memory support is designed for Pentagon 256/512/1024.

Only some games use scorpion 256kB memory. And CP/M support scorpion allram mode. Other clones are without good software support.

[Black_Cat]

Theoretically is absolutly unnecessary support paging bits from other ZX clones.

Yes, the smaller variety - so it better! So KAY and Scorpion are united in the standard SKAY-1Mb. Pentagon-1Mb and SKAY-1Mb merged into standards SKAY-4Mb and the Pentagon-4Mb, which are actually a single standard system memory management.

---------- Post added at 18:31 ---------- Previous post was at 18:19 ----------

As I know all software with extended memory support is designed for Pentagon 256/512/1024.

No, not true! Most software uses the drivers of all clones.

---------- Post added at 18:41 ---------- Previous post was at 18:31 ----------

Other clones are without good software support.

KAY, Scorpion, Pentagon, Profi - a clone of ZX Spectrum, mass produced. We can not abandon their support and development.

[Advertiser]

[Ewgeny7]

Короче, дело к ночи.
Да будет так:

Scorpion-4096 memory_manager={p7ffd[7:6],p1ffd[7:6],p1ffd[4],p7ffd[2:0]}.

[VELESOFT]

ZX clones based on paging via D6,D7 on port #7FFD are problematic wit some software:
http://zx.pk.ru/showthread.php?t=122...28%23FD%29%2CA

For play original software for ZX128 must be PENTEVO/SCORPEVO switch to 128kB mode (must ignore paging bits D6,D7,D5 on port 7FFD and disable access to port #1FFD).

Ideal paging for extra memory use ZX PROFI for example. Port #7FFD use paging bits D0-D2 as original ZX128 and additional port #DFFD with next paging bits at D0-D2. Only software support for PROFI memory is not so good as for Pentagons.

Port #EFF7 on Pentevo can active allram mode (ram page 0 instead rom). Port #1FFD on Scorpevo also active allram. Scorpevo combine both ports for allram activation ?

What about active turbo 7MHz on port #EFF7 and via read ports #7FFD and #1FFD ? Both ports is used in SCORPEVO ? If SCORPEVO is switched to 128kB mode (on port #EFF7) then turbo activation via read port #7FFD is always enabled ?

[Ewgeny7]

Port #EFF7 on Pentevo can active allram mode (ram page 0 instead rom). Port #1FFD on Scorpevo also active allram. Scorpevo combine both ports for allram activation ?

No, ScorpEvo don't have eff7 port. AllRAM mode activated with bit 0 of 1ffd port (as original Scorpion).

What about active turbo 7MHz on port #EFF7 and via read ports #7FFD and #1FFD ?

No reading ports 1ffd & 7ffd only.

If SCORPEVO is switched to 128kB mode (on port #EFF7) then turbo activation via read port #7FFD is always enabled ?

ScorpEvo don't have 128kb mode, so far as don't have eff7

---------- Post added at 14:51 ---------- Previous post was at 14:46 ----------

|S256|Kay |P512|Pv2.2|P4Mb|S-Kay4Mb|
| _-_ | _-_ | _-_ |A17’ |A19’ |A21’ |D5 #7FFD
| _-_ | _-_ |A17’ |A18’ |A18’ |A20’ |D6 #7FFD
| _-_ |A19’ |A18’ |A19’ |A17’ |A17’ |D7 #7FFD
|A17’ |A17’ | _-_ | _-_ |A20’ |A18’ |D4 #1FFD
| _-_ |A18’ | _-_ | _-_ |A21’ |A19’ |D7 #1FFD

БК, PentEvo не содержит порта 1FFD Я его добалял для режима Скорпиона.

---------- Post added at 14:56 ---------- Previous post was at 14:51 ----------

PentEvo page mapping:
( {2'd0,p7ffd[7:5],p7ffd[2:0]} )
from source code

[Black_Cat]

For play original software for ZX128 must be PENTEVO/SCORPEVO switch to 128kB mode (must ignore paging bits D6,D7,D5 on port 7FFD and disable access to port #1FFD)

Полностью с Вами согласен

---------- Post added at 23:32 ---------- Previous post was at 23:24 ----------

PentEvo не содержит порта 1FFD Я его добалял для режима Скорпиона.

наплевать на то, что содержит, или не содержит PentEvo. PentEvo - это всего лишь шаблон, а не икона. Что нужно - то и будет содержать