https://wiki.amstrad-cpc.net/index.php?action=history&feed=atom&title=BIOS_Cassette_%28or_Diskette%29_Functions 2026-09-04T09:03:20Z Revision history for this page on the wiki MediaWiki 1.46.0 https://wiki.amstrad-cpc.net/index.php?title=BIOS_Cassette_(or_Diskette)_Functions&diff=63373&oldid=prev 2010-12-19T16:39:42Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw-interface=""> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:39, 19 December 2010</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:BIOS]]</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Cassette Init ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Cassette Init ==</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   BC65 CAS_INITIALIZE</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   BC65 CAS_INITIALIZE</div></td></tr> </table>

MacDeath https://wiki.amstrad-cpc.net/index.php?title=BIOS_Cassette_(or_Diskette)_Functions&diff=63372&oldid=prev 2010-01-24T22:02:26Z

<p>Created page with &#039;== Cassette Init == BC65 CAS_INITIALIZE BC68 CAS_SET_SPEED ;in: HL=upper16bit, A=lower8bit BC6B CAS_NOISY ;in: A=output &quot;Press PLAY&quot; messages (0=yes, &gt;0=no) ==…&#039;</p> <p><b>New page</b></p><div>== Cassette Init ==<br /> BC65 CAS_INITIALIZE<br /> BC68 CAS_SET_SPEED ;in: HL=upper16bit, A=lower8bit<br /> BC6B CAS_NOISY ;in: A=output &quot;Press PLAY&quot; messages (0=yes, &gt;0=no)<br /> <br /> == Cassette (or Diskette) Input ==<br /> BC77 CAS_IN_OPEN ;in: HL=fname, B=fnamelen, DE=workbuf,<br /> ;out: HL=header, DE=dest, BC=siz, A=type, cy=err, zf<br /> BC7A CAS_IN_CLOSE ;out: DE=workbuf, cy=0=failed (no open file)<br /> BC7D CAS_IN_ABANDON ;out: DE=workbuf, cy=1, z=0, A=all_closed (FFh=yes)<br /> BC80 CAS_IN_CHAR ;out: A=char, cy=0=error, zf=errtype<br /> BC83 CAS_IN_DIRECT ;in: HL=dest, out: HL=entrypoint, cy=0=err, zf=errtype<br /> BC86 CAS_RETURN ;in: A=char (undo CAS_IN_CHAR, char back to buffer)<br /> BC89 CAS_TEST_EOF ;out: CY=0=eof (end of file)<br /> <br /> == Cassette (or Diskette) Output ==<br /> <br /> BC8C CAS_OUT_OPEN ;in: HL=fname, B=fnamelen, DE=workbuf, out: HL,cy,zf<br /> BC8F CAS_OUT_CLOSE ;out: DE=workbuf, cy=0=failed (zf=errtype)<br /> BC92 CAS_OUT_ABANDON ;out: DE=workbuf, cy=1, z=0, A=all_closed (FFh=yes)<br /> BC95 CAS_OUT_CHAR ;in: A=char, out: cy=0=error, zf=errtype<br /> BC98 CAS_OUT_DIRECT ;in: HL=src, DE=len, BC=entrypoint, A=type, out: cy/zf<br /> <br /> == Cassette (or Diskette) Catalog ==<br /> BC9B CAS_CATALOG ;in: DE=workbuf, out: DE=workbuf, cy=0=error<br /> <br /> == Cassette Single Block Access &amp; Motor Control ==<br /> BC9E CAS_WRITE ;in: HL=src, DE=len, A=ID(2Ch=header, 16h=data), out?<br /> BCA1 CAS_READ ;in: HL=dest, DE=len, A=ID(2Ch=header, 16h=data), out?<br /> BCA4 CAS_CHECK ;in: HL=src, DE=len, A=ID(2Ch=header, 16h=data), out?<br /> BC6E CAS_START_MOTOR ;out: A.bit4 old motor status (0=off, 1=on), cy=0, z=1<br /> BC71 CAS_STOP_MOTOR ;out: A.bit4 old motor status (0=off, 1=on), cy=0, z=1<br /> BC74 CAS_RESTORE_MOTOR ;in: A.bit4 new motor status (0=off, 1=on), cy=0, z=1<br /> <br /> == Machine Pack Boot Program ==<br /> BD13 MC_BOOT_PROGRAM ;in: HL=loader_callback, out: starts program<br /> Loads and starts a BINARY program, typically used when typing RUN&quot;filename.bin&quot; under BASIC. The callback should load the program from whatever source (CAS, DISK, or elsewhere), and should then return CY=1=okay &amp; HL=entrypoint (or HL=0000h to reboot the BASIC ROM), or CY=0=failed.<br /> If the callback returns CY=1 then the program (or BASIC ROM) is started via MC_START_PROGRAM, otherwise, when CY=0, &quot;*** PROGRAM LOAD FAILED ***&quot; is displayed, and the OS (ie. typically BASIC) is restarted.<br /> <br /> == Machine Pack Start Program ==<br /> BD16 MC_START_PROGRAM ;in: HL=entrypoint (0000h=BASIC), C=ROMcfg<br /> Starts a BINARY program, typically used when typing RUN&quot;filename.bin&quot; under BASIC (expecting that the file is already loaded into memory). The function resets all BIOS memory, sets SP=C000h, DE=LORAM=0040h, HL=BAS_HIRAM=ABFFh, BC=BIN_HIRAM=B0FFh, and does then call the entrypoint (incoming C:HL) via RST 18h, if incoming HL was zero then it calls 0:C006h (ie. reboots the BASIC ROM).<br /> Observe that the program is started with only the raw BIOS initialized; but without extensions like AMSDOS. To install them (if needed), the entrypoint function should set HL=BC (to deallocate BASIC RAM), then call KL_ROM_WALK (to install all extension ROMs) or, set C=07h and call KL_INIT_BACK (to install only AMSDOS).</div>

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