License

Recommend Projects

Amiga 500 (plus) 68000 Relocator with Ranger Memory ($C00000-$D7FFFF)

1 year ago 1395
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

68000 relocator for the Amiga 500(+) with additional "Ranger" Memory .on the CPU bus (so not on the slow Chipmem bus). expansion will disable internal trapdoor expansions that are not set to chipmem (A500 jumper on mainpcb)

output of U5 (memory decoder) Y0 - $80000-$87FFFF Y1 - $88000-$8FFFFF Y2 - $90000-$97FFFF Y3 - $98000-$9FFFFF Y4 - $C0000-$C7FFFF Y5 - $C8000-$CFFFFF Y6 - $D0000-$D7FFFF Y7 - $D8000-$DFFFFF

In project Y4,Y5 and Y6 are used to select a memory chip. when selected, the /AS is kept high for the amiga mainboard, preventing gary to enable internal (slow mem) expansions.

more on the memory layout of the amiga: https://www.amigacoding.com/index.php/Amiga_memory_map

Status of Project, not tested

Documents

Amiga Ranger Relocator

New PCB

BOM

ID Name Designator Footprint Quantity
1 CY62157ESL U2,U3,U4 TSOP(II)-44 3
2 MC68000P SOCKET,U1 DIP64-746-01 2
3 100nF C1,C2,C3,C4,C5,C6,C7 C0603 7
4 1N4148WS D1,D2,D3 SOD323F 3
5 Header-Male-2.54_1x2 P2 HDR-2X1/2.54 1
6 74F138D U5 SOIC-16_150MIL 1
7 74HC10D U6 SOIC-14_150MIL 1
8 74F32D U7 SOIC-14_150MIL 1

Attachments

None

Members

Success
The owner does not allow comments in this project now

Comments (0)

goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.