Memory
Commodore 64 system ROM
20 KiB of mask ROM holding BASIC, the KERNAL operating system and the standard character set.
- Manufacturer
- Commodore Business Machines
- Architecture
- Mask ROM
- Introduced
- 1982
- Word size
- 8 bit
- Type
- Mask ROM
- Record status
- approved
Figures
| Metric | Value | Evidence | Basis | Method | Source |
|---|---|---|---|---|---|
| Memory capacity memory | 20 KiB | Confirmed | Vendor-rated | Design capacity Stated by the vendor BASIC, the KERNAL operating system and the standard character set. Banked over the RAM inside the same sixteen-bit address space, not added to it. |
Fitted to
Editorial notes
Banked into the same address space as the RAM, so the ROM and RAM capacities describe overlapping address ranges and must never be added together into a single memory figure.