블로그 이미지
안녕하세요? 이안입니다. 과학의 모든것을 좋아합니다. 이안김

카테고리

분류 전체보기 (417)
NOTICE (7)
SALE (8)
자유 게시판 (40)
◆ APPLE II (53)
◆ SD Smart Drive (17)
◆ SD DISK II Emulator (81)
◆ SD Music card (19)
◆ Mockingboard 4c (13)
◆ Hyperion 512K RAM+ (5)
◆ PS2 Adapter (7)
◆ Z80 Card (20)
◆ APMSX (23)
◆ FC-150 (15)
◆ OLD IBM PC (20)
◆ MPU 관련 (9)
◆ CPLD (1)
◆ RF (5)
◆ 진공관및 오디오 (29)
◆ AutoBike (14)
◆Other (26)
비공개 연구실 (0)
★ 개인방 (0)
스크랩 (0)
임시보관함 (0)
Total116,366
Today25
Yesterday16

달력

« » 2019.9
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30          

공지사항


APMSX card is a computer card for APPLE II.


It is a MSX computer and slot type for APPLE II.

It runs with APPLE II not just sit on slot.

It isn't a emulated FPGA MSX card  It has own Z80 CPU with 512KB SRAM with TTL logics and CPLD(Which is only used to reduce lots of TTL chips).


APMSX work very closely with APPLE II.

It access APPLE II memory or I/O of APPLE II.


APPLE II and APMSX can communicate each other. 


Both systems have common shared memory area.

The common area are include APPLE II's I/O area($Cxxx) and memory area, APMSX could access APPLE II's peripheral such as HDD(SD DISKII plus) even Mocking board could make it work.


In the beginning of APMSX design, I share whole memory area of APPLE II and it's looks good and both are work as brain shared computer. but, It became bottle neck of the system on both. They can't run full speed when it open as shared.


APMSX works 7.16Mhz(Two times of MSX) speed and while access sharing area, Z80 and APPLE II BUS have to synchronized and results APMSX become slow.

Because of this performance issue, I redesign to small share area. 

And finally 16KB of Page2 on MSX.

Anyway, I'm still considering if I need to make it adjust the size of share.



Now I have Max. 256KB RAM (If MegaROM mapper ON, It will be 128KB)

It's enough RAM on MSX1 system.

I hope that someone could use this size of memory for nice program for DOS2 or Game runner.


APMSX has integrated ROM mapper for Mega Games.

ASCII 8K , ASCII 16K and Konami mapper support.

8K Mapper auto detect if it required a Konami or ASCII 8K Mapper.

(8K <> 16K have to selecte before to start game)



ASCII 8K Mapper



ASCII 16K Mapper 




Konami Mapper



Anyway, I'm keeping developing to make it perfect.


Thanks a lot

Ian Kim



'◆ APMSX' 카테고리의 다른 글

APMSX runs at 16Mhz  (0) 2019.04.07
APMSX runs with SD DISKII Plus  (0) 2019.03.04
APMSX card is under improving  (0) 2019.02.26
APMSX(MSX) card external SLOT is working  (0) 2017.11.12
APMSX supports 256KB games(Konami 8K ROM mapper)  (0) 2017.06.06
APMSX card being upgraded  (0) 2017.06.04
Posted by 이안김

최근에 달린 댓글

최근에 받은 트랙백

글 보관함