CP/M is open-source now

• MS-DOS

  59 15,623 0.0 Assembly

  Discontinued The original sources of MS-DOS 1.25 and 2.0, for reference purposes

  

Note that the OEM README[1] for MS-DOS 2 (the first version with a hierarchical filesystem) suggests that it was at IBM’s insistence that MS-DOS used backslash for directories and slash for options, rather than slash for directories and hyphen-minus for options. The documentation and examples for CONFIG.SYS[2] also bear an evident Unix influence, note in particular AVAILDEV and SWITCHAR. (The DOS system calls for files always accepted either separator, but the option parsers would retrieve SWITCHAR[3] and give it precedence.)

[1] https://github.com/microsoft/MS-DOS/blob/master/v2.0/source/...

[2] https://github.com/microsoft/MS-DOS/blob/master/v2.0/source/...

[3] http://www.ctyme.com/intr/rb-2752.htm

• cpm22

  1 113 10.0 Assembly

  CP/M 2.2 source code

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

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