Monthly Archives: November 2019

Ramworks III repair

My good old AE RamWorks III card that i had used with several Apple //e’s with the handy VGA-adapter (, started to give strange graphical errors, kind of missing lines and waves when using 80-column mode. Only in the few top lines of the screen (a2osx shown here).

Luckily Mr. Plamen Vaysilov figured out quickly what could be done, small mod of soldering capasitor of 22-33pf (of any voltage) could be just soldered and get it fixed. It however took few weeks to get the part as just my local electronics supplier had IT-system issues and they were forced to close their shop… Luckily most hobbyists have other projects too so it was’t that much of a big deal, just shift of focus for other things.

But later i got the parts and i soldered 27pf capasitor as shown. Might not be the best of soldering work but it works… Yeah the legs could be.. shorter.

No more missing lines or waves. 


FinApple 2019 (c)
Apple II Forever. 


APMSX-card: MSX for Apple II – Part 1


APMSX-card is “Turbo Speed” MSX-computer-in-a-card solution for Apple //e enhanced (ntsc) and Apple IIGS. It doesn’t work in Apple II, II+, //c (no slots.. sorry Javier).

It is deloped by Ian Kim of out of South Korea, who is prominent Apple II hardware developer who have made many other products in a past, like the following :

-SEGA/ColecoVision-card (Z80+VPD)
-Mockingboard 4d (for Apple //c)
-Joypad for Apple II
-Z80 CP/M card
-SD Disk II+ 
-PS/2 adapter
-SD Smart Drive
-SD Music Card
-Hyperion 512k RAM-card

Ian used years in order getting it all together. Being in edge for abandoning whole project but with strong will he pulled it together! That was major task. It was risky project as it was known it would not be cheap card to develop, produce or sell.

What is MSX?


MSX was a 8-bit home micro computer standard founded by Microsoft and ASCII in 1983 trying to create standard for home computers like VHS was at home video tape machines.

MSX was specially popular in Japan even it was sold around the world – being moderately popular in europe, specially The Netherlands. 

MSX hardware was built around Zilog’s Z80 processor and usually 64k of RAM.

More can be read from :

MSX is also very much alive among hobbysits around the world, with new hardware and software coming out all the time. 

My first computer was Spectravideo SVI-728 MSX so this is like coming to the roots for me. The SVI-728 MSX was quite popular in Finland at the time, but nothing like Commodore 64 was. I only had the MSX for some years and it got replaced with Commodore 128 soon after and shortly with Amiga 500. The games i remember playing with the MSX were “Yie Ar Kung Fu 2”, “King’s Valley”, “Zoids”, “Oh Shit!” (later renamed to “Oh No!” for obious reasons) and some games translated from Spectrum. Getting games was difficult in my circles as everybody had Commodore 64.. so i was kind of was forced to get Commodore. I did like those Konami module games (even expensive) they were really smooth running.



APMSX comes with:

– APMSX-card
– Joypad and extension adapter-cable  
– PS/2 extension cable for PS/2 keyboard (for full MSX usage)
– Video cable (APMSX to Apple //e)

You need to supply your own video and audio cables.

Originally APMSX-card was supposed to have slot for cartridge games but it was dropped due high cost and not 100% proven compability. That would have been really amazing if that could have worked for sure.

The APMSX-card can be used in many ways and purposes:

1) MSX computer with loading .ROM images directly from card reader.
2) MSX computer with HDD support (SD Disk II+ is needed)
3) Z80 Softcard Compatible CP/M 80 card.
4) 512k RAM card for Apple //e (even during the MSX runnning software)
5) Z80 CPU as co-prosessor, graphics accelarator or sound processor … etc etc…

The processor can be run in different speeds (MSX software) 4MHz, 8MHz and 16Mhz. The 3.58 and 7.16Mhz work only with DMA access of Apple II BUS (i.e. accessing SD Disk II+ in HDD mode).

Conviniently the MSX and Apple II can run at the same time. APMSX basicly is overclocked MSX computer up to 16MHz!


APMSX V1.23a
-MSX1 compatible
-VDP: TMS9918 (NTSC)
-PSG: AY3-8910
-CPU: Z80 Clock speed; 3.58Mhz, 7.16Mhz, 4Mhz, 8Mhz, 16Mhz.
-Mega RAM Mapper support: 256KB Mega RAM Mapper
-Mega ROM Mapper support: 256KB Mega ROM Mapper (Konami ROM Mapper, ASCII 8K/16k)
-DMA BUS share of Apple II resources RAM and I/O peripherals.
-Keyboard: 1 x PS2 Keyboard port
-Joystick: 1 x MSX DB9 standard port

Compatible with *NTSC* Apple //e enhanced and IIGS. With IIGS it however have some limitations with dual working with APMSX, limited memory card access, but general running MSX games or programming doesn’t have a problem on IIGS.

ROM images can be load from ProDOS .HDV hdd file where they can be launced from any suitable sd/usb/cf-card that supports HDD images.

To use the HDD in MSX mode, you need SD Disk II+ device, as there’s drivers/support only for it.



I installed it to my Apple //e enhanced (ntsc) with just minimal cards on it. The power supply is pretty strong (AE Heavy Duty) but i do not remember if it was recapped or not.. so ..

– Apple //e enhanced (ntsc).
– My LG LCD/TV does not accept correctly the NTSC color signal. Some games did load with colors occationally,  but the colors are not correct in all titles. Need one that does PAL and NTSC correctly..
– APMSX works in any slot expect 3) but but suggested slot to use is 4 as the ready loaders (made in basic) are assuming slot 4. Easy to change however. I had the free slot so i went with the slot 4 here.

AUX – RamWorks8M (a2heaven)
SLOT 7 – Apple disk i/o card
SLOT 6 – SD Disk II+ (4GB SD-CARD) + ext. dial with display unit 

SD DISK II+ for HDD in MSX mode support.


Connections to be made:

-Joystick – extension cable with adapter to joystick 
-Audio OUT 1.5mm
-Video OUT RCA 3.5mm
-PS2 keyboard – Keyboard PS/2 connector for external keyboard
-Apple II video in – Video IN  > connected to //e board mudulator output
-Choose between IIgs/IIe

I used composite-SCART adapter to get video and audio to my LCD/TV.


Using the MSX:

PS/2 keyboard is needed if you need any keys pressed for the software/games or you want to use the card as actual MSX-computer.  The PS/2-USB adapter will NOT work. Luckily the PS/2 keyboards are still pretty easy to get. I obtained two different models, both basicly new. Sadly they were swe/fin layout so it’s hit-and-miss using it. If there would be more frequent use i’d get US/UK layout model for sure.

Ian Kim, the developer of the APMSX-card, provides few sample .hdv images to buying customers only as well complate user’s guide.

“APMSX.HDV” HDV-image is for starting the APMSX card. It is Prodos format including lots of .rom and other MSX-files.

If you want to use the MSX hard disk image, you need to connect it to D2 to be used by SD Disk II plus-device (no drivers for other hardware card reader solutions as of yet).

It is possible to use both computers with their own displays! This is somehing i didn’t yet test of. I only focused on playing games from the .rom files 🙂


MSX software:

As my display does not display NTSC correctly some colors are not correct. As well for some reasons, occationally starting the games they were black/white. Not correct sync on NTSC signal. This is something i need to invest on.

Switching from MSX mode back to Apple II is done by CTRL+RESET.

game_screen_colors_s ntsc_game_loaded_bad_s
With colors (not correct ntsc) – Black & White (ntsc)

But playability on games such “Yie Ar Kung-Fu II” (Konami) was absolute fun! This game i had as a cartridge back in the day. And yes i’m not that good on it even after all these years… These popular kungfu games were all bascily the same, fighting against enemy screen by screen and finally the big boss. The graphics just changed as well the movements. These cartridge games by Konami are really top-notch quality!

Video in youtube:

Another MSX-favorite of mine “Knightmare” played great. It have very clear and arcade styled graphics and very enjoyable gameplay. This is one of the games i come back and play few rounds with.


There were even some MSX-demos on hdv image file. I’ll need to find more of these – i have not followed the MSX-scene for years..


“MSX unleashed” – demo.



The card is NOT cheap investment if you want to use it for gaming and in real MSX-computer mode, you’ll need the SD Disk II+ device as well. With that money you can actually buy an real MSX/MSX2 – computer, not sure what those MSX sd/usb solutions cost but possibly still cheaper. But remember, it took years to develop the card as well, building this card is not cheap either. But for simple MSX game/rom playing, you don’t need SD Disk II+ device, just some device that does ProDOS HDD emulation is enough.

But it really depends. This is extermely compact and convinient solution with lots of other possiblities for hacker-mindeded persons as the card lives alongside the Apple II. It can be made to be much more what it currenly is in the future. The one minor setback is that only SD Disk II+ card is supported if you want to have HDD in MSX-mode. Somebody for a task to write driver for CFFA3000? 

Playing games was easy. Just needed to boot the ProDOS HDD-image and start the game by loading the ROM. For some games there’s ready made basic loader but with APMSX-loader program you could load any ROM easily. For some reasons they do not always start. I am not sure if it’s my setup or what’s the problem. But Ian’s manual mentions this as well. But after reloading or even rebooting, all the games/software on the image worked and were fast as they should to be playable. I didn’t notise any graphical or audio issues. Only my display lacking the real NTSC support was issue for me. For playing i used either the pad that was supplied with the card or my old-favorite, TAC-2. 

The actual MSX-computer mode i didn’t use much yet. That i will get into later as well the CP/M and using the card as RAM expansion etc. More in Part 2.

..i hope someday somebody would do Atari2600/5200/7800 card as well.. that would be neat as well! Why? Because, why not!



APMSX is available from:

FinApple 2019 (c)
Apple II Forever.