SDLTRS and the Videogenies

( German text )

There are various emulators for the TRS-80 (and other models) from Tandy. Unfortunately, little is known about the computers from EACA and TCS that are compatible with Tandy and are manufactured and distributed in Germany. These are only partially supported in the well-known emulators.I use Jens Guenter's emulator SDLTRS for the demonstration. Unfortunately, pictures of the screens of the original systems are much more difficult to take with a digital camera and are not always visually appealing. I also don't have all the systems presented here in my collection, which is why they can only be shown in the emulation. Please read the SDLTRS online documentation.

All files on this webside are included in sdltrs_und_die_videogenies.7z so that the examples can also be tried out locally. I have tested the calls under Windows 10-64bit, if a 32bit Windows is used, SDL2TRS64.EXE must be replaced with SDL2TRS.EXE in the calls.

And yes, EACA made even the Colour Genie. But this one  doesn't belong to the true TRS-80 compatibel systems, but a lot code in the ROM of  the Colour Genie  comes from the Video Genie. For the Colour Genie there are spezial emulators found on the web. I prefer the  "CGENIE - The EG 2000 Colour Genie Emulator" from Jürgen Buchmüller (Pullmoll) running with MSDOS and real floppydrives. A  version for linux was completed by Schnitzeltony.


Genie I/II   G-DOS    NEWDOS   H(acktory)-DOS   Schmidtke CP/M

Genie III   G-DOS2.1   G-DOS2.4   Kaempf  CP/M   Holte CP/M   Lowe CP/M


Genie IIs   Kaempf CP/M   G. Schroeder CP/M   Grafik

Genie IIIs   Holte CP/M   Kaempf  CP/M 2.x   Kaempf  CP/M 3   G-DOS 2.4   Grafik und RDLBASIC  

The Video Genie

The best known is probably the video Genie I - also known as EG 3003. The Video Genie I had a cassette recorder installed, the Video Genie II had a 10-key keyboard instead of the cassette recorder. Information on all EACA / TCS computers can be found here, with the majority of the documentation being in German language. EACA has distributed the Video Genie as a TRS-80 compatible Computer Genie I/II in Europe. Other names were chosen in other countries.In Australia and New Zealand, for example, under the name System-80. The Genie computers were produced by the company EACA in Hong Kong and were distributed in Germany by the company TCS (Trommeschläger Computer Service). TCS offered extensive peripherals for the Genie I/II computers. The TCS Video Genie was also known as the "Video Genie System".

Video Genie I (

Videogenie I Videogenie I Platinen

Video Genie II (

Videogenie II Videogenie II

The Video Genie was originally delivered with NEWDOS-80.But then there was G-DOS (a germanized and expanded NEWDOS) and with various extensions to the 64-character mode, the 80-character mode and "high-resolution" graphics. With a banking adapter and memory expansion (necessary for the older models), CP/M was also available and possible as operating system.
Emulation for G-DOS with german character set:

sdl2trs64 -rom vg1-TCS-rom.bin -charset1 genie -disk0 flogd02.dmk

Videogenie I GDOS 2.2 mir deutschen Zeichensatz  GDOS und AGCAP (Autopdrive)

and for NEWDOS:

sdl2trs64 -rom vg1-TCS-rom.bin -disk0 flond62.dmk

g1_newdos_01.png g1_newdos_02.png

There were also various adjustments to NEWDOS / G-DOS in the user groups of the time.

Here are the adaptations by Arnulf Sopp which he called H(acktory)-DOS. The H-DOS 2.3c supports the "EG-64 MBA (Memory-Banking Adapter" from TCS and this is also emulated with SDLTRS. The command B? displays the corresponding RAM banks of the EG-64 MBA. See also the german documentation for HDOS.

sdl2trs64 -rom vg1-TCS-rom.bin -charset1 genie -disk0 hdos23c.dmk

Hacktory Hacktory MBA

In addition to NEWDOS and GDOS, LSDOS or TRSDOS are also available as operating systems. The calls are according to the examples above. However, I mostly used NEWDOS or GDOS.
The following applies to the German character set:

In SDLTRS: Press ALT-I, select "Model I Character Set" and there select "Genie", with ENTER, TAB or SPACE confirm and press ESC... or on the command line with the option -charset1 genie ...
This character set is then used:
/* CG 10 - german charset for Genie I/II & Video Genie from: */
With the option of memory expansion and/or bank switching, CP/M 2.2 was also possible, giving access to another large software area. Since port 0xFE got a bit "tight" for the emulator, there are a few changes:

The option for "CP/M-Banking" (Mattes/Schmidtke) is:
-speedup cpm, while the clock frequency remains at 1.78 MHz: it becomes a bit more "cozy"
- with -speedup lnw the LNW80 emulation is activated: 4 MHz and "fade in" the HRG into the lower 16K

Schmidtke CP/M - BIOS by Günter Ermer for the Videogenie

sdl2trs64 -rom vg1-TCS-rom.bin -charset1 genie -speedup banking -disk0 flocpm01.dmk

With the Schmidtke CP/M for the Videogenie the driver for the 80-Z card can be installed with copy sys.sys=sys80.sys. After a "cold start" with SHIFT-F10, this is then activated and 80*22 characters are displayed. In the Schmidtke-CP/M, the keyboard layout has been changed somewhat: the colon is on SHIFT-0 (function key F6 in SDLTRS), the semicolon is replaced in the "original" by SHIFT + SPACEBAR + ;, in SDLTRS this is currently only possible via the "Virtual Keyboard": ALT + J and select Keyboard there.

Below is 64 char mode, right is 80char mode.
Schmidtke CP/M 2 for Genie I Schmidtke CP/M DIR

Bios from Eberhard Mattes (thanks for the EMX on OS/2).

sdl2trs64 -rom vg1-TCS-rom.bin -charset1 genie -speedup banking -disk0 flocpm02.dmk

CP/M BIOS Eberhard Mattes BIOS Eberhard Mattes STAT DSK:

That's for the Video Genie I (Video Genie System).

Other computers were also developed by TCS and EACA. All of them run the operating systems known from the TRS-80, including CP/M on the Genie IIs, Genie III, Speedmaster and Genie IIIs models.

Genie III

(Pictures from:

Genie III Genie III

The Genie III is  TRS-80 compatibel running NEWDOS, G-DOS and CP/M.

sdl2trs64.exe -rom g3_holte_eprom.bin -disk0 g3gd21-1.dmk

G3 GDOS 2.1 G3 GDOS 2.1

sdl2trs64.exe -rom g3_holte_eprom.bin -disk0 g3gd24-1.dmk

G3 GDOS 2.4

CP/M for the III was made by Klaus Kaempf, Thomas Holte and  Lowe Elecronics.

Klaus Kaempf is allready activ and his CP/M-Version 2.2X for the  Genie IIs and the Genie III is on gitlab available.

CP/M 2.2 from Klaus Kaempf:

dl2trs64.exe -rom g3_sysrom_5100-01_2716_save.bin -disk0 cpm-2_2XV3-for-GenieIII.jv3

G3 Kaempf CP/M CP/M Kaempf PDRIVE

Thomas Holte made a CP/M 2 and a CP/M 3 (Plus). CP/M 3 bis banked with emulating the G3PLUS card which expand memory to 384kb.
For the Holte CP/M there is  the  'Holte-BIOS-ROM' needed. See how to add it  to the real Genie III.

CP/M 2.2 from Thomas Holte:

sdl2trs64.exe -rom g3_holte_eprom.bin -disk0 hv22d_01.dmk -serial ""

G3 CP/M 2.2 Holte

CP/M 3 banked from Thomas Holte (emulatet with the GeniePLUS card and on the right as the card is really missing nonebanked)

sdl2trs64.exe -rom g3_holte_eprom.bin -disk0 g3-gplus.dmk -serial ""

G3 Holte CP/M 3.0 gebankt Genie 3 CP/M 3 nonebanked

I like to use NZCOM with CP/M 2.x (a ZCPR enhancemend for CP/M)  or  Z3PLUS  with CP/M 3.x

sdl2trs64.exe -rom g3_holte_eprom.bin -disk1 hv22d-02.dmk -disk0 hv22d-03.dmk

G3 Holte CP/M 2 NZCOM G3 Holte CP/M 2 NZCOM Inhalt

CP/M 2.2 from LOWE Electronics:

sdl2trs64.exe -rom g3_holte_eprom.bin -disk0 g3lowe01.dmk -serial ""


 Speedmaster and the Genie IIs

The Genie IIs and the Speedmaster use a backplane and cards in ECB format but are not compatibel to the ECB bus..
The Speedmaster has a 19" frame, der Genie IIs has a frame like teh Genie IIIs.



sdl2trs64.exe -rom speedm.rom tcs -doubler both -disk0 speedm.dmk -speedup tcs

CP/M 2.2a from Thomas Holte

speedmaster CP/M by Thomas Holte

Genie IIs (picture from the TCS flyer)

Genie IIs Genie IIs short info

Genie IIs CP/M Klaus Kaempf:

sdl2trs64 -rom vg1-tcs-rom.bin -doubler percom -speedup tcs -disk0 g2s-cpm22x.dmk

  Genie IIs CP/M 2.2x Kaempf

Genie IIs grafik in G-DOS 2.4 with RDLBASIC

Grafik unter GDOS 2.4

Genie IIs with the CP/M from Gerald Schroeder. Gerald Schroeder replaced the Z80 with a moderne HD64180 and build the CP/M for his system.

sdl2trs64.exe -rom speedm.rom -disk0 g2s-gs-cpm.dmk -doubler both -speedup tcs

As of the special hardware and using a terminal over rs232 connection in this emulating is no cursor seen but the system is running.

Genie IIs CP/M von Gerald Schroeder   Genie IIs mit HD68140

Genie IIIs

The Genie IIIs is my favorite system. Speed is like the Genie IIs and Speedmaster. In the picture is the clamshell (IBM clone like) from ORGADATA.
Orgadata modificated the  Genie IIIs to use 1.2MB PC floppydrives, but the possibility of connecting 4 x  8" drives was lost.
The Genie IIIs could use  4x5.25" and 4x8" floppydrives without modifications.

Genie IIIs Genie IIIs mainboard

Below the Genie IIIs from  TCS with the metallcase of  1mm dickness. The picture is from the TCS flyer as my Genie IIIs is open at the moment.

Genie IIIs von TCS im 1mm Gehäuse Genie IIIs mit 8 Zoll Floppydrive

CP/M 3 from Thomas Holte:

sdl2trs64 -rom g3s_8501004_bootrom_2732.bin -disk0 g3s-h-f1.dmk -disk1 g3s-holte_jens.dmk

CP/M 2.2 from Klaus Kaempf:

sdl2trs64 -rom g3s_8501004_bootrom_2732.bin -disk0 g3s_f09.dmk

Genie IIIs CP/M 2 Klaus Kaempf Genie IIIs CP/M 2 Klaus Kaempfmit NZCOM

CP/M 3 from Klaus Kaempf:

sdl2trs64 -rom g3s_8501004_bootrom_2732.bin -disk0 escpm010.dmk

Genie IIIs CP/M 3 Klaus Kaempf Genie IIIs CP/M 3 Klaus Kaempf Autostart Z3plus

In the above image Z3PLUS is starting automatically - no profile.sub is needed

Genie IIIs CP/M 3 Klaus Kaempf mit z3plus Genie IIIs CP/M 3 Klaus Kaempf mit ZFILER

G-DOS 2.4 Masterdisk for Genie IIS, Genie III and Genie IIIs

The systemdisks vor the seperate Genie type will be made with:

DO GDOSIIS [enter] oder DO GDOSIIIS [enter] oder DO GDOSIII [enter]

Only the device specific DOS will be copied to the floppydisk in drive 1.

sdl2trs64 -rom g3s_8501004_bootrom_2732.bin -disk0 gdos24_master_char.dmk

GDOS 2.4 Master  64 Zeichen Modus

Directory shown in 80 char mode.

GDOS 2.4 masterdisk 80z Modus

Genie IIIs G-DOS 2.4
Below  G-DOS 2.4 made from the masterdisk for Genie IIIs with only files for the Genie IIIs on floppydisk.

sdl2trs64 -rom g3s_8501004_bootrom_2732.bin -disk0 g3s-gdos24.dmk

Genie IIIs GDOS 2.4 Genie IIIs GDOS 2.4 DIR

G-DOS 2.4 below in 64 char mode and right  with 80 char.
Genie IIIs GDOS 2.4 64Z Genie IIIs GDOS 2.4 64Z

Directory in 80 char mode with clock enabled:

80 Zeichen Modus

  RDLBASIC was enhanced for "high-resolution" graphics. Below some examples using RDLDEMO/JOB - start it with  DO RDLDEMO

German Documentation for G-DOS 2.4