The following table shows hardware compatibility between the various microprocessor-based cards and other modules in the SC500 series.
SC503 includes a Z180 CPU, an 18.432 MHz clock oscillator, 512k bytes of Flash “ROM”, 512k bytes of RAM, two asynchronous serial ports, and an SPI port for use with an SD memory card adapter. The ROM will typically contain RomWBW, which includes CP/M and BASIC.
SC516 includes a Z80 CPU, a 7.3728 MHz clock oscillator, 32k bytes of ROM, 128k bytes of RAM, and an asynchronous 9600 baud serial port. The ROM will typically contain the Small Computer Monitor (SCM) and a version of BASIC. SC516 is CP/M ready.
SC527 is very similar to SC516. It has been designed primarily to use a more readily available ROM chip. It also has the option of either a can oscillator or the more traditional crystal oscillator.
SC518 includes a Z80 CPU and a 7.3728 MHz clock oscillator. A separate memory card is required.
| HARDWARE COMPATIBILITY | SC503 Z180 Processor | SC516 SC527 Z80 Processor | SC518 Z80 CPU |
Standard backplanes | SC503 | SC516 SC527 | SC518 |
| SC501 – 7-slot, narrow |  | | |
| SC507 – 3-slot, narrow | | | |
| SC508 – 10-slot, wide | | | |
| SC515 – 14-slot narrow | | | |
Modular backplanes | SC503 | SC516 SC527 | SC518 |
| SC513 – 6-slot, power | | | |
| SC522 – 6-slot, narrow | | | |
| SC517 – RC2014 adapter | | | |
Power supply cards | SC503 | SC516 SC527 | SC518 |
| SC502 – 12-volt input | | | |
| SC526 – 5-volt input | | | |
Processor cards | SC503 | SC516 SC527 | SC518 |
| SC503 – Z180 processor | |  | |
| SC516 – Z80 processor | | | |
| SC527 – Z80 processor | | | |
| SC518 – Z80 CPU only | | | |
Memory cards | SC503 | SC516 SC527 | SC518 |
| SC519 – Z80 memory | | *1 | |
| SC523 – Firmware dev. | | *1 | *1 |
Storage cards | SC503 | SC516 SC527 | SC518 |
| SC504 – CompactFlash | | | |
| SC503 – includes SD card | | | |
Serial port cards | SC503 | SC516 SC527 | SC518 |
| SC511 – Z80 SIO + CTC | | | |
| SC521 – Z80 SIO | | | |
| SC520 – 68B50 ACIA | | | |
Digital I/O cards | SC503 | SC516 SC527 | SC518 |
| SC506 – 8 in, 8 out | | | |
| SC509 – Z80 PIO | | | |
Prototyping cards | SC503 | SC516 SC527 | SC518 |
| SC510 – Prototyping | | | |
| SC512 – Breakout | | | |
Other cards | SC503 | SC516 SC527 | SC518 |
| SC505 – RTC and I2C | | | |
| SC514 – Z80 CTC timer | | | |
= Compatible without modification = Not compatible (eg. mutually exclusive functions) *1 = Compatible if one or more socketed chips are removed
Check software/firmware details for software support. While hardware compatibility is indicated above, software support may not be included.
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