MB02+ <-> ResiDos copy tool 1.5

[Black_Cat]

Only, Velesoft told me, that IDE ports for Sprinter are unknown or hidden. Could you tell us which IDE ports are used by Sprinter?

Sprinter is not the most common computer, moreover, he no longer supported by the manufacturer and stop its development. Now supported clones Scorpion, Kay, Pentagon, as well as the ZX Spectrum compatible computer ATM-2+. It must be because of that memory management in all of these computers is different from one another. A single standard for memory management and video mode management is still in development. Therefore, eliminate the distinction is only possible with the device drivers.

[balu_dark]

но ведь у нас был CASHE RAM который как раз подменял нулевую банку ПЗУ и народ в него например плеер ковоксовых мелодий тулил если не ошибаюсь. и вроде это было стандартной доработкой пентагона. если все как я помню - достаточно для работы их системы поставить 16 или 32к озу на кэш и все будет кул.

[Black_Cat]

I think, Velesoft, has such card nearly ready, but definitely, users of Scorpion and Pentagon would need this card, and only after that they can use BSDOS( Would they be willing to do that? To connect one more card? What do you think?

In order to answer this question should be understood that wants to make VELESOFT.

Добавлено через 2 минуты

но ведь у нас был CASHE RAM который как раз подменял нулевую банку ПЗУ

единого стандарта небыло

[VELESOFT]

http://velesoft.speccy.cz/prodej/prodej4/mb02-mem.htm

This is my old interface with MB02 memory paging support. Function is very similar as russian cache sram for ZX. This interface can disable internal ZX rom and replace adress space 0-16383 with external sram or rom page.

Info about new memory paging port #17 (write only port) :
D0-D4 - number of page 0-31
D5 - memory write enable (1) / write disable (0)
D6 - 1=external sram enable (D7 must be 0)
D7 - 1=external rom enable (D6 must be 0)

After power-on/reset is external memory disable(reset port). Signals BANK0-BANK4 from port #17 is connect to A14-A18 on external SRAM and ROM.

Software for MB02 interface can be modified for any other ZX clones with ram paging(with selectable write protect) in rom area.

[balu_dark]

in some russian clones like "Robik" or its precessor based on programable logical chip (not remember name but it has RE3 and RT11 in schematic) also used port but number 15(dec)
write to this port was enable RAM(low 16k from computer RAM chip).
as i remeber this maded for using CP/M system on this ZX-clones.anyway - protect from write in low memory not present (this is IMHO cos i use this PC in 1993 little later - i extend it to 128k so not need disable ROM anymore.)

Добавлено через 1 час 15 минут
http://sblive.narod.ru/ZX-Spectrum/Baltik/Baltik.htm
i remember this clone - "Baltic"
at this pace exist scans from one of soviet magazines with detail descriptions of computer itself and ports map.

[Black_Cat]

Software for MB02 interface can be modified for any other ZX clones with ram paging(with selectable write protect) in rom area.

VELESOFT, can I have software support for the internal DRAM computer?

[VELESOFT]

VELESOFT, can I have software support for the internal DRAM computer?

Yes, but ZX clones with ram paging in low 16kB not support write protect feature. Software for MB02 use modified ZX roms (rom image in ram page with write protect). If rom images will used in ram page only, then software/games can rewrite rom area.

Systems for MB02 support NMI button for call menu. On russian ZX clones is NMI button used only for BETADISC(TR-DOS snapshot)

After reset is on MB02+ set external rom page with boot menu. You can exit from menu and continue to start computer, or set MB02 mode and use any system from MB02+.

Systems for MB02:
BS-DOS (2MB fdd images - hdd support)
RESIDOS (fat 16 support)
FATWARE (fat 16 support - read only ZX emulator files TAP,SNA,Z80,SCR,GIGASCREEN)
DEMFIR (same as FATWARE, but support real CD-ROM and work with ISO images on HDD/CF)
ZXVGS (CP/M)

[Black_Cat]

VELESOFT, for what purpose is memory banking interface - just replacement ROM, or there are system variables OS, data and programming code?

This is my old interface with MB02 memory paging support.

The interface is supported by all operating systems?

[VELESOFT]

VELESOFT, for what purpose is memory banking interface - just replacement ROM, or there are system variables OS, data and programming code?

Yes, complette code of all systems is in external memory only. This memory is used for new stack, screen barkup, free space for sector loading from IDE (fork with fat13/iso/cd-rom). External memory disable original ZX rom and replace it with external sram memory with modified zx rom(+write protect). This modified rom can swith to any external sram page with write enable/disable page.

The interface is supported by all operating systems?

No. This is original systems for DIVIDE. But I modify this code for easy use in other interfaces with 16kB ram paging. Only RESIDOS is designed for MB02 memory.

Добавлено через 12 минут

VELESOFT, for what purpose is memory banking interface - just replacement ROM, or there are system variables OS, data and programming code?

But theoretically is possible use only modified rom memory(bigger than 16kB) containing main code of new system. Code in rom can copy main code of system to extra memory used in russian zx clones. And system can work complette in higher 16kB (49152-65535).

Or next way:
Modified rom can before starting system backup zx memory(16384-49151) to extra memory (>128kB) and copy main code of system to this memory(at 16384-49151). Before exit form system must be refresh original ZX memory from backup.

[hood]

VELESOFT, for what purpose is memory banking interface - just replacement ROM, or there are system variables OS, data and programming code?The interface is supported by all operating systems?

We have talked about it with Velesoft and he agreed to release schematics of his memory upgrade (very easy schematics, actually):

http://velesoft.speccy.cz/prodej/prodej4/mb02-mem.htm

So, ex USSR speccy users can build it and use it on their machines. In case, somebody needs help with building the hardware or needs software for it, Velesoft and me are here to help.

Hood