Mc-2g-102

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Z80 - mc-2g-1024

  • The specifications are:
    • New ROM monitor with multi-boot capability, Format, Getsys and Putsys tools and debug capabilities. No BASIC in ROM.
    • SD-HC capable card controller.
    • Multi volume disk system, which currently supports upto 254 8MB disk volumes (which uses 2GB+ on the SD-card). All these volumes can be loaded with a separate OS bootimage.
    • OSes configured with 3 drives: A:, B: and C:. A: is the system drive (holding the volume booted from) while B: and C: can be assigned and re-assigned one of the remaining volumes. Also a RAM disk for CP/M 2 and CP/M 3
  • Y2k compatible system clock (date and time) for all OSes.
  • mc-2g-1024 on retrobrew site
  • Supports:
    • Dos+ 2.5
    • CP/M 2.2
    • CP/M 3.1
    • ZSDOS 1.1 / ZCPR2
    • ZPM3 /ZCCP
    • NASCOM “ROM” BASIC 4.7

S1 - CP/M 2.2 - Dos+ 2.5 - CCP+ Ver 2.2

  • This is an unpatched implementation by C.B. Falconer's Dos+ version 2.5.
    • Please read the documentation to switch on the optional features.
  • Because this OS treats console input differently (it checks for user breaks after each character it outputs) the original DOWNLOAD.COM no longer works.
    • It was modified to use direct BIOS I/O to circumvent the above behaviour, but because after every file the command prompt is displayed some characters are still lost.
    • This is circumvented by padding the input file with enough spaces to make up for the lost characters.
    • This version of DOWNLOAD.COM also works under CP/M 2.2 and CP/M 3.
      • A way to work around this is to just download all the files you want under CP/M 2.2 to the target disk mounted as B: or C:
  • Dos+ implements a search path which is initialized by the command STARTUP.COM.
    • STARTUP.COM is automatically run when the system is first booted.
    • STARTUP.COM can be any .COM command you like, as long as the name does not change.
  • Mounting drives is done with the MOUNT.COM tool.

Volume1.png

SD Vol 001.png

S2 - CP/M 2.2

  • This OS is as was provided by Grant Searle.
    • It uses a new BIOS, providing mountable volumes, a Ramdisk and a clock.
    • All Grant's tools work as intended, in particular the original DOWNLOAD.COM.
  • The start address for the initial download of "DOWNLOAD.COM" (backdoor startup) from the provided .HEX file has changed to FFFB.

Volume2.png

SD Vol 002.png

S3 - CP/M V3.0

Volume3.png

SD Vol 003.png

S4 - MP/M II V2.1

Volume4.png

SD Vol 004.png

S5 - Z80 BASIC

Volume5.png

S6 - CP/M 2.20 - ZSDOS v1.1

Volume6.png

SD Vol 006.png

SD Vol 006B.png

S7 - CP/M V3.0

Volume7.png

Volume7dir.png

SD Vol 007.png

SD Vol 007B.png

S9 -

Volume9.png

Volume9B.png

Volume9C.png

Volume9D.png

Volume9E.png

SD Vol 009.png

S10 -

Volume10.png

Volume10B.png

Volume10C.png

Volume10D.png

Volume10E.png

S11 -

Volume11.png

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