DIY Cartridge
Description
The file below is the PCB Layout for a standard plus cartridge with
a few minor changes:
- No LKs are bridged by default
- LKs use standard PCB jumpers for quick swapping
- All vias are done at component pins to reduce drilling and soldering
Building the Cartridge
The PCB dimensions are identical to an original cartridge and will fit in the original housing. The PCB used should be 1.5mm thick with double-sided 35µm copper.
Components should be mounted on the side with the ground plain. The capacitor is 100nf.
The Layout file is as always mirror imaged.
Setting the LK's
| EPROM | Pins | Capacity | LK Settings | Description |
| 27C256 | 28 | 32K | LK3 + LK5 | A15=VCC=High + A17=VCC=Supply |
| 27C512 | 28 | 64K | LK3 + LK6 | A15=A15=Addressed + A17=VCC=Supply |
| 27C1001 | 32 | 128K | LK1 + LK6 | A15=A15=Address + A18=VCC=/PGM |
| 27C2001 | 32 | 256K | LK1, LK4 + LK6 | A15=A15=Address, A17=A17=Address + A18=VCC=/PGM |
| 27C4001 | 32 | 512K | LK2, LK4 + LK6 | A15=A15=Address), A17=A17=Address + A18=A18=Address |
Links
This cartridge enable you develop original softwares and get the full use of 512K ROMs.
If you want to put four existing 128k games on a single Cartridge check the Multi Cartridge page instead.
Documents
File:Cartridge Layout.pdf - PCB Track Layout
Bryce.
