SPECIFICATION:
- ZX ram extention to 1MB (1024 kB)
This big memory can be used as:
ZX ram, ROM emulation area, DivIDE memory, MB02 memory, TR-DOS ramdisc
- Support memory paging of computers (russian ZX Spectrum clones) :
Original ZX Spectrum 128 kB
ZX Profi 1024 kB
Pentagon 128 kB
Pentagon 512 kB
Pentagon 1024 kB
Scorpion ZS 1024 kB
- Rom extention to 512kB (reprogrammable flash eprom)
Big rom is used as more 64kB rom blocks. Each
block contain 128editor + 48rom + reset service monitor + tr-dos rom.
Rom chip can be emulated in 1MB ram with write protect.
- extra NMI button
Profi interface use new NMI button. Function of
this button is possible disable or enable. In DivIDE mode work identical
as on original DivIDE interface.
- TR-DOS rom maping
In combination with 1024kB memory is
possible use TR-DOS rom versions with ramdisc support. TRD images can be
imported to high memory and used as floppy drive. This mode is very
powerfull - your ZX can use software for BETA-DISC interface/russian ZX
clones.
- DivIDE memory paging
Profi interface can work also as DivIDE
interface. Only IDE ports must be connect on ZX bus. DivIDE eeprom and
ram is contended with 1MB memory. 1MB memory can contain more parts of
DivIDE memory for possibility use more DivIDE systems (easy switching in
ZX basic via one OUT command. DivIDE eeprom memory flashing is also
emulated and original FLASH utilities can be used.
- MB02+ memory paging
It's mode compatible with MB02+ memory.
First 128-512kB ram is usable as ZX memory and second 512kB as MB02+ ram.
In this mode is used maximal MB02+ memory configuration 512kB ram +
512kB rom. NMI work in more modes. Original flash rom utilities for
MB02+ can be used if your PROFI interface contain corresponding rom chip
(128kB or 512kB).
- Interface switching
This version of firmware can't disable memory access for external interfaces on ZX bus.
External memory is always used with higher priority. Is possible use any
external devices or active internal MB02,DIVIDE or TR-DOS with ramdisc. Software
switching between TR-DOS and DIVIDE.
This firmware is usable also with
external Z80 DMA (external MB02+ interface can use Z80DMA chip)
If you don't use MB02 interface then go to special firmware with high priority
for internal memory (divide,mb02,tr-dos). It's best for comfortable work. |
