Imported from GitHub: mrehkopf/ReClockator-500 · commit 8e74c00 · license GPL-3.0

Description

Changes the orientation of a 68000 DIP CPU, adds 4 clock ports

README

ReClockator 500

Summary

ReClockator 500 is an Open Hardware adapter PCB that changes the orientation of a 68000 DIP CPU; it is intended for use with the Amiga 500 computer to facilitate arrangement of expansions inside the case.

It also adds four clock ports and one RTC port, all available on a 30-lead FPC connector.

Origins

ReClockator 500's lineage:

• RetroJuvenation's Open68000Relocator
  • SukkoPera's Open68000Relocator
    • LinuxJedi's Open68000Relocator
      • ikari_01's ReClockator 500 ← You are here

I took the liberty of renaming the project because of the added clock ports on top of its relocative nature.

Added Features / Changes

• Four clock ports (Based on Gayle's "SPARE" mapping)

  • Port 0 @$D80001
  • Port 1 @$D84001
  • Port 2 @$D88001
  • Port 3 @$D8C001

• One RTC port @$DC0001

  • If another RTC expansion is already present in the Amiga 500, JP1 must be soldered to "Disable".
  • NOTE: Port must be either enabled or disabled using JP1 on the PCB's bottom side!

• Length-matched squiggly traces removed for space requirements

  • 4-layer PCB is kept to provide nice return paths.

• Signal names are removed from the CPU pin header to make space for the clock port decoding logic.

Clock Port Connections

The pinout for the 30-lead FPC connector is as follows:

Pin #	Function
1	GND
2	+5V
3	+5V
4	+5V
5	#INT6
6	#SPARE0_CS
7	#SPARE1_CS
8	#SPARE2_CS
9	#SPARE3_CS
10	GND
11	#RTC_CS
12	#RTC_PWRBAD
13	#IORD
14	#IOWR
15	A5
16	A4
17	GND
18	A3
19	A2
20	D23
21	D22
22	D21
23	GND
24	D20
25	D19
26	D18
27	D17
28	D16
29	#RESET
30	GND

In addition, an #INT6 pin is present on the PCB. It must be connected to the #INT6 signal on the Amiga 500 main board.

License

Open68000Relocator and, by extension, ReClockator 500, is Open Hardware released under the GNU General Public License (GPL) v3. If you make any modifications to the board, you must contribute them back.

Open68000Relocator and, by extension, ReClockator 500, is provided to you ‘as is’ and without any express or implied warranties whatsoever with respect to its functionality, operability or use, including, without limitation, any implied warranties of merchantability, fitness for a particular purpose or infringement. We expressly disclaim any liability whatsoever for any direct, indirect, consequential, incidental or special damages, including, without limitation, lost revenues, lost profits, losses resulting from business interruption or loss of data, regardless of the form of action or legal theory under which the liability may be asserted, even if advised of the possibility or likelihood of such damages.