Graphic Memory eXpander (GMX)
I/O ports
WORKING OPTION
For quite a long time we tried to get out of
"scorpion people" information about the condition
cases in development "GMX".
how much work is apparently still
is far from complete, to the request to issue
technical documentation for the device, we
received this opus containing very
"dry" data without any comments -
riev.
To our question about at what stage
development in progress, received foggy
the answer is that the device is in a state
layout of the printed circuit board and undergoes testing
Verification for serial suitability.
So, this is what we have at this moment -
ment:
All ports are write only
(port xxFF - reading).
Unused digits are not used -
Xia.
xxFE Curb port
D0 - G
D1-R
D2 - B
xxFF Screen attribute port
(read only)
7FFD Configuration port
(standard)
D0 - SYSO
D1 - SYS1
D2 - SYS2
D3 - SCR
D4 - ROM1
D5 - BLKPK1
1FFD Expansion port
Scorpiona
D0 - BLK1
D1 - ROM2
D4 - SYSЗ
7EFD Порт дополнительных
режимов
D0 - зарезервировано
D1 - зарезервировано
D2 - Normal/Turbo (0/1)
D3 - Graphic 256*192/640*200 (0/1)
DFFD Порт eXpanded Memory
(Profi)
D0 - SM0
D1 - SM1
D2 - SM2
78FD Порт 2-го окна расширения
ОЗУ (#8000-#BFFF)
D0 - SWO SYSO
D1 - SW1 /SYS1
D2 - SW2 SYS2
D3 - SWЗ SYSЗ
D4 - SWЧ SM0
D5 - SWSSM1
D6 - SWb SM2
7AFD Scroller port ml. byte
(8 bits)
DO - ml. bit
...
D7 - art. bit
7CFD Scroller port st. byte
(6 bits)
D0 - ml. bit
...
D5 - st. bit
xxOO Global settings port
D0 - CONF0
D1 - CONF1 - Four bits for selecting
boron of one of the 8
scheme options.
D2 - CONF2
D3 - RECONF D4 - A18 - 1 includes 64K ROM with
standard firmware
D5 - BLKEXT - 1 blocks all ports
xxFD, 7FFD is addressed
by FD
ROM firmware card
#00000 - #ЗFFFF - Scorpion ProfPZU ver
5.0...(256K)
#40000 - #ХFFFF - 8 design options
circuit figurations
#50000 - #SFFFF - Standard firmware
(48+128+TRDOS)
#60000 - #7FFFF - Free for now
All information is preliminary
character and can be changed!!!!
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