Dzieńdobry! Looking at those quarrels I made little summary:
There are two HD interfaces (not including my inventinon) - SD and Atom. Atom is better and can be used without HD drive. My questions: Are they compatibile? What has Atom apart from HD controller? Eg. own ROM, DMA, 1.8MB floppy controller, 8MB RAM, ZX128 hardware emulator, RTC, Centronics, RS232, IEC625, music card etc. ? Start form HDD or needs floppy disk to first BOOT? There are five systems for SAM (not including my work). PRODOS - a CP/M 2.2 compatibile. Does anyone use CP/M on SAM? SAMDOS 2.0 - freeware, but primitive. MasterDOS 3.0 - "better" SAMDOS, but for money. I found in "Technical Manual" that SAMDOS uses hook codes &80..&84, &8B, &93..&97, &9E..&A1, &A4..&A6. I know, that MASTERDOS uses all &80..&AF - where the rest is described? BSDOS by Edwin Blink - like SAMDOS, but emulates floppies on hardisk. Uses special command to login diskimage. HDOS by Nev - gives direct HD access, but syntax is strange - via CALL. And three system patches: QDOS (but not the ancestor of MS-DOS), MaxiDOS+ and MaxiDOS. I have COMET source titled "HD DOS 0.1 (C) 1995 Slawomir Grodkowski". Remarks are in German and some labels in Polish. In additon are some BASIC procedures that deal with catalogs and FAT. Is this the same as HDOS? I am developing multi-hardware operating system for ZX Spectrum called ZXVGS. When I see the finish of it, I could "by the way" make good system for SAM. But it would be SHAREWARE with about 15USD registration. Anybody interested? And I need co-operation. BTW MS-DOS treats as files only dir-entries-info-area, not the whole contents of subdirectory. Some other problems: I have SAM with ROM 3.0. Is any next? One of SAM users from Poland asked me to make music interface for SAM. What it could be? How looks SAM market now? Are there any new programs? Yarek. Ps. If you don't know it is enough not to answer.
