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공지사항

Dear friends and customers,

I glad to annouce another multi functioning accelerater for APPLE II.

It could provide a good capability on APPLE II system with faster BASIC speed, better memory and DHGR acceleration.

I spent some months to design and testing it and now want to receive order for internation buyers.

In fact, some month ago I already completed design and sold it several cards for local friends.

but, It took long time for international customers.
I don't have much good eyes now and then eveymonth feel little different and this card have very small parts and hard to make by hand. New card developing is hard for me.

Spending times and idear into new card.. it is an not just developing... it is an exploring in the APPLE II system.

When I bulding new devices, i really wanted make different than presents others.
I want to assign unique characteristics for my card and then there could be some special functions with it.
When I considered new features into my products, it desn't completed easy, always bring other technical issues.
Maybe I still don't understand some of WOZ machine properly....

I don't know how long could I design and make cards for friends....


I had rest some weeks and feel much better now..   so you can give me order to make yours now.


The A2 OverDrive have sevaral funny functions.
One is Digital output.. and we can play WAV songs with it (Ofcause,  It need a DA converter) 

High speed acceleration doesn't give other than the speed...
But, It bring the possibility for your APPLE II.
Faster running software will make other possibility for real time based game.. 
On the graphics, it could provide smoother faster more object can move at one time period.
But, all software functions... not hard ware addtions.. at least still now the accellerater card was as this.

 

For A2 OverDrive have hardware special functions.

1) interrupt generator
It provide IRQ or NMI interval timer interrupt. user can define the timing of interrupt. 
Hope to be used for multi processing and for event processing.

2)Slot memory
Sold memory area $C100-C7FF which are reserved for ROM on SLOT pheripherals.
A2 Overdrive has ability to override this area to own RAM location.
Hence the area can use for User's area ROM or RAM.
Also $C800-CFF0 area also can override it to own RAM.
It is one of my philosophy that if technically possible then try to make new&fun functions.

3) Digital I/O
Many of people wouldn't use it except sound module function to play the WAV (sampling) sound.
I provide it for H/W fun.
8bits Input and 16bit output.

Other small functions such as fixed interval reader, R/W memory speed adjust etc...
Some are provided setup value due to limitation on APPLE II to co-operate it but, others are for special functions those couldn' find other accelerators.

I'm making the English manual for this card and some are completed but, when you order and receve the card, you can have proper manual.

Other information are scattered on this site. just consider it as an  hide and seek game.

Please order this card for an engineer who want to make more fun devices for APPLE II.

 

https://drive.google.com/file/d/1ngjR27VpbYu-5Wcg0mP1yrwwpku0yMQF/view?usp=sharing 
This is only for the Introduction.

Full users manual would be provided for buyers only.

 

 

A2 OverDrive Introduction

Dear Friends and customers, A2 OverDrive is start to preparing PCB and parts. I will order PCB soon and parts.. (parts price really very high now.. x3-x5 times becam higher) I spent many of times no..

quick09.tistory.com

*RAM works Memory size is 384KB

*8bit Input port now.

https://youtu.be/CvvzKiOJkkA

https://youtu.be/jENz3w-1TC4

 

Specification

• MAX 16Mhz accelerator card for Apple //e  and Some revision of APPLE ][+ are works

• Integrated Memory emulation of Saturn (64KB) and RAMWORKS (384KB)

• Two 8bits Digital Output ports

• One 8bits Digital Input port

• Integrated programmable Interrupts generator

• Additional Virtual SLOT RAM on $C100-$CFFE

 

Acceleration

• A2 OverDrive 65C02 CPU works up to 16Mhz

• Accelerate Main and AUX area

– Accelerates ROM ($D000-$FFFF) and Hi-RAM($D000-$FFFF)

– Accelerates Saturn 64KB and RAMWORSK 384KB

– Accelerates BASIC programs

– Accelerates DHGR and DGR programs

• CPU speed can set to 16Mhz, 7.16Mhz, 3.58Mhz and 1Mhz

 

 

** Shipping issues;

Due to Covid19, only some country covered with the standard shipping costs for shipping.

Please refer to the below and please ask for the shipping costs if your country is not in the list.

In this case, I have to send the package with EMS or for the UPS (Higher costs).

Sorry for it.

 

Standard Shipping only

USA
GERMANY
UNITED KINGDOM
LUXEMBOURG
ITALY
RUSSIAN FEDERATION
MALAYSIA
VIETNAM
CHINA
CANADA
THAILAND
TAIWAN
BRAZIL
SPAIN
SINGAPORE
FRANCE
CANADA
PHILIPPINES
HONG KONG(CHINA)
BHUTAN
SANMARINO
ALBANIA 
GB
JAPAN

 

 

ORDER with Standard shipping only

A2 OverDrive

Thank you very much

Ian Kim 

 

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