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Digitize and superimpose
Digitization is an extra feature of some MSX2
computers; at the moment, blueMSX supports
the Philips NMS-8280 that can digitize in
screen 8 and has also superimposing
capabilities.
If you want to digitize also in the screens
10, 11 or 12, you need to use the Sony HBI-V1
digitizer on MSX2+ or MSXturboR machines;
this device can also digitize in screen 8 on
MSX2 (and higher) machines and is supported
by blueMSX.
Prerequirements
To run the Philips NMS-8280 in blueMSX, you
need the complete config files with all the
specific roms. Check the Resource page of the
blueMSX
website and unzip the config files in the
Machines subdirectory of the emulator.
What concerns the HBI-V1 rom, you can find it
on the Net with an utility disk.
You need also to use a PC with a grabber card
and to connect a video source to this PC. The
emulator can fetch the first video capture
device found in your system or you can select
it manually in the Options / Video In Source
menu.
It's often possible to configure for example
a TV-card before starting blueMSX.
Sometimes you can even configure the capture
device in runtime, at least if you start the
configuration program after blueMSX.
Note that no video will be seen in the
application used for configuring.
This computer has an
additionnal MSX-BASIC command : SET VIDEO.
Syntax : SET VIDEO mode,
intensity, effect, synchro, audio, video, a/v
| mode |
|
picture source |
|
0 = computer
normal mode
1 = computer digitize mode
2 = superimpose
3 = only video |
|
|
| intensity |
|
color intensity |
|
0 = clearer
1 = darker |
|
|
| effect |
|
color effect |
|
0 = no effect
1 = effect |
|
Example
: SET VIDEO 2,0,1: COLOR 15, 4
the video screen will only be with
blank and blue colors |
| synchro |
|
synchronisation |
|
0 = intern
1 = extern |
|
|
| audio |
|
audio source |
|
0 = computer
1 = mix computer + extern only on
right side
2 = mix computer + extern only on
left side
3 = mix computer + extern on both
sides |
|
|
| video |
|
video input |
|
0 = RGB-SCART
1 = other connection |
|
|
| a/v |
|
audio/video
output |
|
0 = other
output than RGB-SCART
1 = RGB-SCART |
|
|
To switch in the SUPERIMPOSE
mode, you need to use SET VIDEO 2 : COLOR ,0,0
To go back to the normal mode, you can use
for example SET VIDEO 0 : COLOR ,4,4
You can also make a VIDEO
MIX (50 % computer picture + 50 %
extern picture) by using COLOR ,0,0 : SET
VIDEO 1: OUT &HF6,&B11011111
To de-activate the VIDEO MIX mode,
you need to use OUT &HF6,&B11111111
Here's a short program to DIGITIZE
:
100 ' DIGITIZE
110 ON STOP GOSUB 210
120 STOP ON
130 SCREEN 8
140 COLOR,,255:' prepares the screen for
digitizing
150 SET VIDEO 1: 'enables the synchronisatie
for digitizing
160 COPY SCREEN: ' beginning of digitizing
170 TIME = 0
180 IF INKEY$ = "" GOTO 160
190 IF TIME < 4 GOTO 190
200 IF INKEY$ = "" GOTO 200 ELSE
140
210 SET VIDEO 0,0: ' end of digitize mode
220 END
This cartridge comes with
a built-in software, 64 Kb VRAM and adds
different commands to the MSX-BASIC :
CALL
AD (A,B,C,D,E,F,G) for
auto digitizing
A = blocksize X
0: 1/1 - 1: 1/2 - 2: 1/3 - 3: 1/4 - 4: 3/4 -
5: 2/2 - 6: 2/3 - 7: 2/4
B = blocksize Y
0: 1/1 - 1: 1/2 - 2: 1/3 - 3: 1/4 - 4: 3/4 -
5: 2/2 - 6: 2/3 - 7: 2/4
C = startblock X
0<C<3
D = startblock Y
0<D<3
E = wait parameter (in frames, 60 per second,
in Europe 50)
0 ~ 255 0 = nowait
F = autocopy
0,1 (1 = autocopy)
G = scanlines
0 = auto, 1= even, 2 = odd
CALL
DCLS to
clear the cartridge VRAM
CALL
DCOPY (A,B)-(C,D) TO (E,F)
to copy from the cartridge VRAM
to the computer VRAM
0 <= A <=255
0 <= B <=211
A <= C <= 255
B <= D <= 211
0 <= E <=255
0 <= F <=211
CALL
DFONT(X,Y,Z$) to write
a text on the screen
CALL
DG to start the built-in
digitizing software
CALL
MD (A,B,C,D,E) for
manual digitizing
A = blocksize X
0: 1/1 - 1: 1/2 - 2: 1/3 - 3: 1/4 - 4: 3/4 -
5: 2/2 - 6: 2/3 - 7: 2/4
B = blocksize Y
0: 1/1 - 1: 1/2 - 2: 1/3 - 3: 1/4 - 4: 3/4 -
5: 2/2 - 6: 2/3 - 7: 2/4
C = startblock X
0<C<3
D = startblock Y
0<D<3
E = scanlines
0 = auto, 1= even, 2 = odd
CALL
TOBAS to reboot the
system
CALL YJK (B,R,G)
for YJK color adjusting with RGB values
-7 < B< 7
-7 < R< 7
-7 < B< 7
See this page : http://www.faq.msxnet.org/hbivi.html
See also the German version of the user's
manual :
http://www.msxarchive.nl/pub/msx/docs/manuals/sonyhbiv1userguidegerman.pdf
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