BCL Molecular BCL Molecular BCL Molecular

| Model | Released | Usage_ | Features | Storage_ |
|---|---|---|---|---|
| SUSIE | 1967 | Stock Updating and Sales Invoicing Electronically | Programmes (2) stored on drum, each with 1000 machine instructions. Programme could be loaded from or written out to paper tape. User interface as SADIE. | As for SADIE, plus magnetic drum (6k words) |
| Mark 1 | 1970 | Sales Order processing | Architecture similar to the Data General NOVA in that the memory and I/O highways were separate whereas DEC used a common highway for memory and I/O with the peripherals occupying memory addresses. The NOVA was a 16 bit design but the Molecular was 18 bit allowing signed arithmetic and a memory parity check bit. The instruction set was in some ways similar to the Nova. The M18 was designed by a small team headed by Colin Chapman & Ian Miller. , Operating system known as LOS developed by Joe Templeman in Leicester office of Systemation. Programming was done in octal notation machine code in longhand using coding sheets. The 17 bit word allowed the limited storage of 3 bytes per word using Metacode | Ferrite core memory. from Plessey or Fabritek and later EMM. , Front-loading disk drive , Optional paper tape reader D400 front-loading cartridge 875 kbit D800 1.75 Mbit |