Corsham SS30 Parallel Board
Reproduction Corsham SS30
Parallel Board MP-L
Differences between the Original and Reproduction:
The major difference in this
board from the original board is the use of a ground plane/pour in all open
space on the board. Solder mask was deleted under the voltage regulator to
provide better cooling of the voltage regulator.
This is a basic unbuffered parallel interface board with two 8-bit
bi-directional ports plus handshake pins for rapid I/O to external devices.
If you plan on using the SD Card Controller, you should use this board. A
ribbon cable connects the SD system to his board. The ribbon cable
provides power. This makes for an easy to setup system with no hand wiring
of cables necessary. The unbuffered PIA signal is also connected to a
header strip for connection to other devices. Should you require a
buffered input and output look at the SWTPC reproduction MP-L, MP-LA and MP-L2
parallel boards.
Features:
- Uses a 68B21.
- Can be used on either 6800 or 6809
systems with 1 or 2 MHz clocks.
- All lines are unbuffered; SWTPC’s
board had buffering which limited the use of pins.
- Pins are brought to both a pair of
single-row headers and a double-row header. The double row header also has
ground and raw 8 VDC to power external devices, such as the SD Card System.
- Both IRQA and IRQB can be jumpered to
either IRQ or NMI for interrupt driven applications.
Downloads
Corsham SS30 Parallel Manual.pdf
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| C-MP-L |
Bare Board |
$8 |
| C-MP-L-ASM |
Assembled board |
$29 |
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