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Backport r178 - keyboard transformer doc update (nw)

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Oggom
2015-08-31 01:07:08 +02:00
parent 6a77032c08
commit 2818079537
1 changed files with 14 additions and 2 deletions
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16
src/boards/transformer.c
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@@ -16,6 +16,19 @@
* You should have received a copy of the GNU General Public License * You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* All regs access only by READ
*
* 5000 - I/O - when read, 0 goes to tape output
* ---m3210
* 3210 - lower scancode nibble
* m - tape input bit
* 5001 - I
* ----7654
* 7654 - higher scancode nibble
* 5002 - I - reset scancode buffer, ready to new input
* 5004 - O - when read, 1 goes to tape output
*
*/ */
#include "mapinc.h" #include "mapinc.h"
@@ -54,10 +67,9 @@ static DECLFR(TransformerRead) {
switch (A & 3) { switch (A & 3) {
case 0: ret = TransformerChar & 15; break; case 0: ret = TransformerChar & 15; break;
case 1: ret = (TransformerChar >> 4); break; case 1: ret = (TransformerChar >> 4); break;
case 2: break; case 2: X6502_IRQEnd(FCEU_IQEXT); break;
case 4: break; case 4: break;
} }
X6502_IRQEnd(FCEU_IQEXT);
return ret; return ret;
} }