https://www.cocopedia.com/wiki/index.php?action=history&feed=atom&title=Synchronous_Address_Multiplexer 2026-04-28T03:09:35Z Revision history for this page on the wiki MediaWiki 1.45.1 https://www.cocopedia.com/wiki/index.php?title=Synchronous_Address_Multiplexer&diff=10755&oldid=prev 2023-12-27T15:42:56Z

<p>added link to Stewart Orchard&#039;s 256K banker board project</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 11:42, 27 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8">Line 8:</td> <td colspan="2" class="diff-lineno">Line 8:</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>* SN74LS785 - used in CoCo 2B</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>* SN74LS785 - used in CoCo 2B</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>* [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM refresh during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)</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>* [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM refresh during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)</div></td></tr> <tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [https://gitlab.com/sixxie/samx4 SAMX4] - CPLD-based SAM replacement with additional 256K banking</div></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>* [https://gitlab.com/sixxie/samx4 SAMX4] - CPLD-based SAM replacement with additional <ins style="font-weight: bold; text-decoration: none;">[https://gitlab.com/sorchard001/dragon-256k-banker-board </ins>256K banking<ins style="font-weight: bold; text-decoration: none;">]</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>* TCC1014 1986 - the 1986 version of the ACVC / GIME replaces and includes much of the SAM functionality for CoCo 1/2 backwards compatibility support</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>* TCC1014 1986 - the 1986 version of the ACVC / GIME replaces and includes much of the SAM functionality for CoCo 1/2 backwards compatibility support</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>* TCC1014 1987 - the 1987 version of the ACVC / GIME also replaces and includes much of the SAM functionality for CoCO 1/2 backwards compatibility support</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>* TCC1014 1987 - the 1987 version of the ACVC / GIME also replaces and includes much of the SAM functionality for CoCO 1/2 backwards compatibility support</div></td></tr> </table>

ExileInParadise https://www.cocopedia.com/wiki/index.php?title=Synchronous_Address_Multiplexer&diff=10754&oldid=prev 2023-12-27T15:39:37Z

<p>Added the K to 256K</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 11:39, 27 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8">Line 8:</td> <td colspan="2" class="diff-lineno">Line 8:</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>* SN74LS785 - used in CoCo 2B</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>* SN74LS785 - used in CoCo 2B</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>* [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM refresh during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)</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>* [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM refresh during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)</div></td></tr> <tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [https://gitlab.com/sixxie/samx4 SAMX4] - CPLD-based SAM replacement with additional <del style="font-weight: bold; text-decoration: none;">256 </del>banking</div></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>* [https://gitlab.com/sixxie/samx4 SAMX4] - CPLD-based SAM replacement with additional <ins style="font-weight: bold; text-decoration: none;">256K </ins>banking</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>* TCC1014 1986 - the 1986 version of the ACVC / GIME replaces and includes much of the SAM functionality for CoCo 1/2 backwards compatibility support</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>* TCC1014 1986 - the 1986 version of the ACVC / GIME replaces and includes much of the SAM functionality for CoCo 1/2 backwards compatibility support</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>* TCC1014 1987 - the 1987 version of the ACVC / GIME also replaces and includes much of the SAM functionality for CoCO 1/2 backwards compatibility support</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>* TCC1014 1987 - the 1987 version of the ACVC / GIME also replaces and includes much of the SAM functionality for CoCO 1/2 backwards compatibility support</div></td></tr> </table>

ExileInParadise https://www.cocopedia.com/wiki/index.php?title=Synchronous_Address_Multiplexer&diff=10753&oldid=prev 2023-12-26T18:46:23Z

<p>I think the &#039;783 and the 6883 were always the same</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 14:46, 26 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l5">Line 5:</td> <td colspan="2" class="diff-lineno">Line 5:</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>== Variants ==</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>== Variants ==</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;"><br></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;"><br></td></tr> <tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* MC6883 <del style="font-weight: bold; text-decoration: none;">- used in CoCo 1/2</del></div></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;">SN74LS783 / </ins>MC6883 - used in CoCo 1/2</div></td></tr> <tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">* SN74LS783 </del>- used in CoCo 1/2</div></td><td colspan="2" class="diff-side-added"></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>* SN74LS785 - used in CoCo 2B</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>* SN74LS785 - used in CoCo 2B</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>* [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM refresh during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)</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>* [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM refresh during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)</div></td></tr> </table>

ExileInParadise https://www.cocopedia.com/wiki/index.php?title=Synchronous_Address_Multiplexer&diff=10752&oldid=prev 2023-12-21T20:35:53Z

<p>typofix</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 16:35, 21 December 2023</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8">Line 8:</td> <td colspan="2" class="diff-lineno">Line 8:</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>* SN74LS783 - used in CoCo 1/2</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>* SN74LS783 - used in CoCo 1/2</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>* SN74LS785 - used in CoCo 2B</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>* SN74LS785 - used in CoCo 2B</div></td></tr> <tr><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: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM <del style="font-weight: bold; text-decoration: none;">refreshh </del>during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)</div></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>* [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM <ins style="font-weight: bold; text-decoration: none;">refresh </ins>during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)</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>* [https://gitlab.com/sixxie/samx4 SAMX4] - CPLD-based SAM replacement with additional 256 banking</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>* [https://gitlab.com/sixxie/samx4 SAMX4] - CPLD-based SAM replacement with additional 256 banking</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>* TCC1014 1986 - the 1986 version of the ACVC / GIME replaces and includes much of the SAM functionality for CoCo 1/2 backwards compatibility support</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>* TCC1014 1986 - the 1986 version of the ACVC / GIME replaces and includes much of the SAM functionality for CoCo 1/2 backwards compatibility support</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>* TCC1014 1987 - the 1987 version of the ACVC / GIME also replaces and includes much of the SAM functionality for CoCO 1/2 backwards compatibility support</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>* TCC1014 1987 - the 1987 version of the ACVC / GIME also replaces and includes much of the SAM functionality for CoCO 1/2 backwards compatibility support</div></td></tr> </table>

ExileInParadise https://www.cocopedia.com/wiki/index.php?title=Synchronous_Address_Multiplexer&diff=10750&oldid=prev 2023-12-21T15:35:23Z

<p>created initial page</p> <p><b>New page</b></p><div>= Synchronous Address Multiplexer =<br /> <br /> Supports the MC6809/HD6309 MPU interleaving memory access with the MC6847/MC6847T1 VDG and the dynamic RAM refresh cycles.<br /> <br /> == Variants ==<br /> <br /> * MC6883 - used in CoCo 1/2<br /> * SN74LS783 - used in CoCo 1/2<br /> * SN74LS785 - used in CoCo 2B<br /> * [http://www.cocovga.com/documentation/sam-accelerator/ SAM Accelerator] - an accelerated SAM allowing RAM refreshh during full double-speed clock mode on CoCo 1/2 (may require upgraded PIAs too)<br /> * [https://gitlab.com/sixxie/samx4 SAMX4] - CPLD-based SAM replacement with additional 256 banking<br /> * TCC1014 1986 - the 1986 version of the ACVC / GIME replaces and includes much of the SAM functionality for CoCo 1/2 backwards compatibility support<br /> * TCC1014 1987 - the 1987 version of the ACVC / GIME also replaces and includes much of the SAM functionality for CoCO 1/2 backwards compatibility support</div>

ExileInParadise