블로그 이미지
안녕하세요? 이안입니다. 과학의 모든것을 좋아합니다. 이안김

카테고리

분류 전체보기 (483)
NOTICE (12)
SALE (8)
자유 게시판 (40)
◆ APPLE II (54)
◆ SD Smart Drive (15)
◆ SD DISK II (82)
◆ SD Music card (27)
◆ SD MIDI ][+ (23)
◆ Mockingboard 4c (21)
◆ Hyperion 512K RAM+ (5)
◆ Accelerator (10)
◆ PS2 Adapter (9)
◆ Z80 Card (24)
◆ APMSX (26)
◆ APV40 (0)
◆ FC-150 (15)
◆ i86 PC (20)
◆ MPU 관련 (9)
◆ CPLD (1)
◆ RF (5)
◆ 진공관및 오디오 (28)
◆ AutoBike (13)
◆Other (27)
비공개 연구실 (0)
★ 개인방 (1)
스크랩 (0)
임시보관함 (0)
Total
Today
Yesterday

달력

« » 2024.10
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 31

공지사항

최근에 올라온 글

On Apr 21, 11:17 pm, Steven Hirsch <snhir...@gmail.com> wrote:
> I'm a little confused... Haven't a bunch of folks reported plugging a 65816
> directly into a 6502 socket - with a pin bent out?  Or, did they all really
> mean to say 65802?

Looking at the IIe circuit, it looks like simply
disconnecting pin 1
would indeed work because the Apple IIe leaves pins 3,5,35,36,38 and
39 unconnected.
A II+ on the other hand uses pin 3 (to disable the
data bus buffers) and grounds pin 38.

If you had a card that used the uP SYNC signal (pin 39 of the
peripheral bus) then the VPA signal from the 65816 would not be a
suitable replacement. As the Apple II(+) had USER1 on that pin and the
IIgs has /M2SEL I don't think that many cards would need it.

That only leaves the question of the 65816 driving the data bus during
phase 1. This might prevent snooping the video data, preventing a
program that uses this technique to synchronize with the video
scanner. Has anyone tested this after swapping CPUs?

Otherwise, a 65816 in a IIe with pin 1 bent up should not cause
problems (provided noise on the N/C pins does not interfere with the
default state of those signals).

'◆ APPLE II' 카테고리의 다른 글

APPLE//e 회로도, APPLE][+ 회로도  (0) 2014.02.26
6502 CPU의 리버스엔지니어링  (0) 2014.02.26
8비트 APPLEII 시절의 GUI  (0) 2014.02.17
BattleC  (0) 2014.02.17
Lode runner  (0) 2014.02.11
Posted by 이안김
, |

최근에 달린 댓글

최근에 받은 트랙백

글 보관함