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Robotron KC85/1

F

flaviosr

Experienced Member
Joined
Aug 27, 2016
Messages
268
Location
Turin, Italy
Dear Group,
I have a working KC85/1 from Robotron apart that the video signal is really really bad.
I have looked over the Internet but I have found a good amount of doc ma no schematics.
Does anybody know a site where to download some schematics?
Thank you
 
A lot of interesting things... I would like to build an RGB cable but I am stuck on the SSP pin... what is SSP? Where can I connect to a SCART cable?
Thank you
 
I can't prove it, but I have a theory...

The SSP is internally connected to +5V (5P) via a 300 Ohm resistor in the machine. See: http://www.sax.de/~zander/z9001/z9sch_4.pdf.

On the SCART socket there is pin 16 that is sometimes known as "blanking" and other times as "RGB switch". See: http://martin.hinner.info/vga/scart.html.

This signal should be HIGH for an RGB video connection and LOW for a composite video connection (both being on the SCART connector). If you connect an RGB signal up - and have pin 16 LOW - then the signal will be 'blanked' (as there is no connection to the composite video input).

Just a thought...

Dave
 
flaviosr said:
A lot of interesting things... I would like to build an RGB cable but I am stuck on the SSP pin... what is SSP? Where can I connect to a SCART cable?
Click to expand...
The SSP signal is called "Schaltspannung" and used to switch the TV into RGB mode (when used on an RGB-enabled SCART input).

Take a look for pinout explanations at https://www.sax.de/~zander/z9001/tip/tip6.html to either an RGB monitor (such as Commodore 1084SD) or VGA (15.5 kHz only). The latter example uses the SSP signal to power a sync separation circuit.
 
I prefer to make a SCART cable, generalistic and easier than the VGA one.
If I have understood well I have to make the following connections:
° Colors to Colors
° SSP to RGB Blanking (do I have to limit the voltage?)
° SYNC to Composite Video Input
° Ground to the Grounds of the previous signals
Do I have to consider some components in the wiring?
 
I was looking at the MAME Emulator, and found 4 large Images (DATA DUMPS) with each
Sector being encoded in the file. (The first 8 Bytes are the encoding, and need to be purged
so cpmtools can access the files. This has to be done for each of the 800 sectors. )

Code: 
       00000000   00 00 00 00  01 03 00 04  53 59 58 4C  AF 32 EF 90  ........SYXL.2..

The first 00 (and third 00) is Track.
The second 00 (and fourth 00) is the Head.

The 03 is the Sector size
00 - 128
01 - 256
02 - 512
03 - 1024

I looked at the end of the file for the Track number and found 0x4F = 80 Tracks and 2 Heads.

With this information I conjured up a small program to strip the Header info and retain
the actual data, which is a (Sector Dump) and can be written with DD, Windows RAW WRITE,
HxC, and IMD.

Code: 
 825600 Jan 21  2003 A5105SYS.DUMP
 825600 Dec  8  2002 CAOS.DUMP
 825600 Dec  8  2002 MICRODOS.DUMP
 825600 Dec  8  2002 TOOLS.DUMP

cpmtools gave good directory listings of the Image (.RAW) files.

Code: 
# ROB1  PC1715 SCP
diskdef rob1
  seclen 1024
  tracks 160
  sectrk 5
  blocksize 2048
  maxdir 128
  skew 1
  boottrk 4
  os 2.2
end


Code: 
  $ cpmls -f rob1 -D CAOS.RAW
     Name    Bytes   Recs  Attr     update             create
------------ ------ ------ ---- -----------------  -----------------
BASEX   .KCC     2K      3
DEP     .COM     2K     11
DEVEX   .KCC     2K      5
FLOAD   .KCC     2K      3
FORTHEX .KCC     2K     12
FSAVE   .KCC     2K      3
INITIAL .SUB     2K      1
SERVICE .KCC     2K      5
TEXOREX .KCC     2K      5
    9 Files occupying     18K,     760K Free.

$ cpmls -f rob1 -D A5105SYS.RAW
     Name    Bytes   Recs  Attr     update             create
------------ ------ ------ ---- -----------------  -----------------
APFEL   .SCR    32K    254
AUTOEXEC.BAS     2K     13
AUTOEXEC.SUB     2K      1
BICDEMO .       12K     95
BICINFO .        6K     36
CCPBIC  .TXT     4K     25
DEMO    .BAS     2K      2
DIENST  .COM    16K    116
DREHUNG .SCR    96K    766
DRESDEN .SCR    34K    257
DRUEIN  .BAS    14K    111
DRUTE   .BAS     8K     50
DUMP    .COM     2K      4
ERGBESCH.TXT    12K     84
HELP    .PRG     2K      4
HLPKC87 .BAS     2K     11
K87     .RMC     2K      6
KC87    .RZG     4K     17
KC87AS  .BAS     2K      2
KRONENT .SCR    34K    257
PIP     .COM     8K     58
ROBOTR  .SCR    12K     81
ROSETTE .SCR    32K    254
SCHMAL  .RZG     4K     17
SCPX5105.SYS    12K     95
SCREEN  .COM     2K      2
SCREEN  .TXT     2K     14
SGENBIC .BAS     2K      2
STANDARD.RZG     4K     17
STAT    .COM     6K     42
SUBM    .COM     2K     10
VDISK   .COM     2K     13
XSUBBIC .COM     2K      6
ZG      .COM     2K      5
   34 Files occupying    380K,     398K Free.

$ cpmls -f rob1 -D TOOLS.RAW
     Name    Bytes   Recs  Attr     update             create
------------ ------ ------ ---- -----------------  -----------------
KCEMPF  .COM     2K     12
KCSEND  .COM     2K      9
LBREXT  .COM    10K     66
MCRC    .COM    10K     78
MCRC    .EXE    28K    220
MODF    .COM     4K     31
MODF    .DAT     2K      4
PMEXT   .COM    14K    101
SWEEP40 .COM    28K    219
TRANSFER.COM    26K    200
UNARC   .COM     6K     37
UNCR    .COM     8K     50
UNSQ    .COM     2K     15
UUDECODE.COM    12K     82
UUENCODE.COM    10K     80
   15 Files occupying    164K,     614K Free.

$ cpmls -f rob1 -D MICRODOS.RAW
     Name    Bytes   Recs  Attr     update             create
------------ ------ ------ ---- -----------------  -----------------
CAOSDISK.COM    26K    197 R
COMPUMOD.COM     2K      4 R
FORMAT  .COM     4K     19 R
INITIAL .SUB     2K      1 R
K6304   .LST     2K      2 R
K6311   .LST     2K      3 R
K6313   .LST     2K      2 R
KCEMPF  .COM     2K      4 R
KCSEND  .COM     2K      3 R
MSYSG   .COM    20K    152 R
PIP     .COM     8K     58 R
S3004   .LST     2K      1 R
S6005   .LST     2K      1 R
S6010   .LST     2K      2 R
SDCOPY  .COM    18K    136 R
STAT    .COM     6K     42 R
TP      .TXT    10K     74 R
TPDRUCK .OVR     8K     60 R
TPHT    .OVR    28K    223 R
TPI05   .TXT     4K     21 R
TPI1-2  .TXT     2K     16 R
TPIDAISY.TXT     6K     34 R
TPINSTD .000    42K    331 R
TPINSTD .001    66K    518 R
TPINSTD .002    16K    124 R
TPINSTD .COM    30K    236 R
TPKC    .COM    18K    137 R
TPOVLY0 .OVR    34K    266 R
TYPEMOD .COM     2K      3 R
V24H12  .KOP     2K      1 R
   30 Files occupying    370K,     408K Free.



Larry
 

Attachments

  • Robotron-KC-85-DUMPS.zip
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