Category Archives: SEGA

Sega SG-1000 & Colecovision on your Apple //e ?

SEGA SG-1000:



Was the very first video-gaming console released by SEGA in 1983.
Running with Zilog’s Z80 3.58MHz with amazing 1kB of RAM and 2kB of VRAM and capable of displaying up to 16 colors.




Was Coleco Industries’s second generation home video-game console released in August 1982.
Running with Zilog’s Z80A at 3.58MHZ

So what is this “CP/M Turbo 7 with VDP-1000 Plus”-combo then?


Ian Kim of from South Korea have made very interesting board-add-on to his previously released, CP/M Turbo 7-card. It’s called “VDP-1000 Plus” wich is an VDP-option board which you can add to your CP/M Turbo 7-card. If you add it later, it requires some soldering or if you buy them together as a kit, they come completely ready product.

Basicly it allows running SEGA SG-1000 and Colecovision games on your Apple //e at 2MHz.
Both of those systems were Z80 based (and this opens interesting thoughts..) so the add-on card CP/M Turbo 7 acts as an processor for those two systems and the VPD-1000 Plus-add-on works as video generator for both. Currently they sell about 160 dollars + shipping at Ian’s Webpage (see link in the end) as a combo.

Explanations from Ian Kim:

CPLD chip have logic circuits to act as the SG1000 and Colecovision same I/O address decoders for Joypad, TMS9918 and SN76489. TMS9918 require 1bit DRAM 8pcs but, 1bit 16Kb DRAM is rare andmore it required negative voltage so, changed non negative DRAM but,
finally I decided to use 8bits one SRAM. it is much easier to find hence, the circuits should be much different than original.  Finally I’ve used one 9bit 32K SRAM. it is still oversize but cheap and one SRAM required. Three latch used and one Not chip. It were used to split data I/O and Address.

Sound generator chip is SN76489 which is used by SG1000 and Colecovision. it have three tones and one noise and it has some strange behavior it made sound after power ON not accessed but it generating noise maybe it is too much small to put reset function.

So, when I apply this sound chip and power ON the APPLE II, it start making annoying noise as beep… so, I must OFF this so used switch. Now, It is ON when the board start to work. Also Video output can be switched from APPLE II and VDP side. It active when  data come to VDP address.


So how it all fits in yer Apple //e then?

04_all_cards_assembled_sInstallation : you install the both cards together and then put the combined cards in SLOT #1. There’s the joystick connector you need to connect, and video signal you take to the internal video connector on the Apple //e motherboard as well the audio+video cables (red and white rca-type) you need to connect to your monitor for video and audio output.

Internal video cable connection to motherboard:


Set up of speed Z80-card to 2mhz “normal” otherwise the SEGA or Colecovision-modes are not working.


Set up of system VPD-mode, choose which mode you wish to use (from the VPD-card). “SEGA” or “COLV”.

So, how you use it?

The card came with links to few disk images (.nib and .hdv) that contain the basic bootup (ProDOS) software you need to boot first from. I used the .hdv file (hdd image) with Apple //e Enhanced NTSC with CFFA3000. At boot you need to choose wich system you are using:

1. SEGA SG-1000

And after choosing it lists you the rom files that are included – or you have transfered to the disk image yourself. It asks what ROM-file you want to load up, and after you type the filename, it loads it up. The software itself is very simple basic program so you can modify it at will.

Then you’re, with luck, good to go!


It works! It works!

H.E.R:O. (Activision) running with SEGA SG-1000-mode:

Lode Runner (Broderbund) running with SEGA SG-1000-mode:

And one more gameplay video:

Some games do not work, some games freeze or are too slow due the 2MHz mode the emulation works. There’s however coming an upgraded CP/M Z80-card wich should fix these issues with speed. Audio works great on those rom-images i was tested playing with.

By no any means it’s perfect of 100% compatible with all titles, but it’s close and i see lots of fun with these kinds of projects! Maybe the upgrade of the CP/M Turbo 7 card to faster speeds will make difference?


Afterwords .. and more:

There’s a “APMSX” (AppleMSX) -card in development wich is an standalone card which emulates the MSX (Z80) and allows playing (some) MSX-games on your Apple //e. There’s also possibility of MSX2 (!) card coming after the MSX-card is released. This picture is static rom file loaded up with the card, it does not support the keyboard so it’s not usefull as of yet.

EARLY APMSX development/prototype-card from Ian’s webpage.

This is SUPER interesting implementation for the Apple //e for sure, i personally can not wait for the MSX/2 card to be released!

This is absolutely one of the most interesting cards and ideas for long time in Apple ][-community!

We truly live the golden-age of the Apple ][.

Ian Kim :
CP/M Turbo 7 and VPD :
User manual :
SEGA SG-1000 :
Colecovision :

(C) FinApple 2017 & Apple ][ forever!