|
|
Line 12: |
Line 12: |
| |[[File:Mac SE 341-0538-A.jpg|100px]] | | |[[File:Mac SE 341-0538-A.jpg|100px]] |
| |} | | |} |
|
| |
| == Equations ==
| |
| <div class="toccolours mw-collapsible mw-collapsed" style="width:600px; overflow:auto;">
| |
| <div style="font-weight:bold;line-height:1.6;">341-0538-A Equations</div>
| |
| <div class="mw-collapsible-content">
| |
| <pre>
| |
| pin 1 = CLK; /* Unused input */
| |
| pin 2 = PB6; /* Input */
| |
| pin 3 = IRQ; /* Input */
| |
| pin 4 = WRDATE; /* Input */
| |
| pin 5 = ENABLE1; /* Input */
| |
| pin 6 = PA4; /* Input */
| |
| pin 7 = 16MCLK; /* Input */
| |
| pin 8 = PA3; /* Input */
| |
| pin 9 = RTXNABLW; /* Input */
| |
| pin 11 = OE; /* Input */
| |
|
| |
| pin 12 = RTXCA; /* Combinatorial output */
| |
| pin 13 = OUTA; /* Input */
| |
| pin 14 = BBUIRQ; /* Fixed low output w/ output enable */
| |
| pin 15 = ENABLEL; /* Combinatorial output */
| |
| pin 16 = ENABLEU; /* Combinatorial output */
| |
| pin 17 = FLOPPYWR; /* Combinatorial output */
| |
| pin 18 = NC; /* Unused input */
| |
| pin 19 = FCLK; /* Combinatorial output w/ output enable */
| |
|
| |
| !FCLK = 16MCLK;
| |
| FCLK.oe = !OE;
| |
|
| |
| !FLOPPYWR = WRDATE;
| |
|
| |
| !ENABLEU = !ENABLE1 & !PA4;
| |
|
| |
| !ENABLEL = !ENABLE1 & PA4;
| |
|
| |
| BBUIRQ = 'b'0;
| |
| BBUIRQ.oe = !PB6 & IRQ;
| |
|
| |
| !RTXCA = !PA3 & !RTXNABLW & !OUTA
| |
| # PA3 & !RTXNABLW & !OUTA
| |
| # !PA3 & RTXNABLW & !OUTA
| |
| # PA3 & !RTXNABLW & OUTA;
| |
| </pre>
| |
| </div></div>
| |
|
| |
|
| == Credits == | | == Credits == |
| *IC donated by [[Kai Robinson]] for reversing | | *IC donated by [[Kai Robinson]] for reversing |
| *IC picture from [[Porchy]] | | *IC picture from [[Porchy]] |