Christopher Ironside coins of the British Commonwealth had their reverse designed by Christopher Ironside. These coins were struck as (Board 1): Under the provision of the Manx Decimal Currency Act of 1970, a decimal series of coins for the Isle of Man were prepared and released on 20 October 1971 (½, 1, 2, 5, 10 and 50 new pence coins). The reverse of most of these coins was designed by Christopher Ironside. This set had the same composition and size as the corresponding British coins. These coins were struck as: 1971 first decimal set (issued from 1971 to 1974): As a country
Decimal computer extended to wider formats and hence are now slower than using 32-bit or wider BCD 'tricks' to compute in BCD (see ). The x87 FPU has instructions to convert 10-byte (18 decimal digits) packed decimal data, although it then operates on them as floating-point numbers. The Motorola 68000 provided instructions for BCD addition and subtraction; as does the 6502. In the much later 68000 family-derived processors, these instructions were removed when the Coldfire instruction set was defined, and all IBM mainframes also provide BCD integer arithmetic in hardware. The Zilog Z80, Motorola 6800 and its derivatives, together with other 8-bit