Initial commit of zxbox - a ZX Spectrum emulator ported by Anton Romanov. It theoretically runs on all targets, but I have not included it in the Archos builds because it is just too slow to be usable.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10950 a1c6a512-1295-4272-9138-f99709370657
2025-11-17 00:52:38 -05:00 · 2006-09-15 11:11:16 +00:00 · 2006-09-15 11:11:16 +00:00 · 05a7f14f8d
commit 05a7f14f8d
parent 1350d57751
88 changed files with 19624 additions and 0 deletions
--- a/apps/plugins/zxbox/sp_def.h
+++ b/apps/plugins/zxbox/sp_def.h
@ -0,0 +1,84 @@
+/* 
+ * Copyright (C) 1996-1998 Szeredi Miklos
+ * Email: mszeredi@inf.bme.hu
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version. See the file COPYING. 
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include "spperif.h"
+
+#define MARK_SCR(addr) SPNM(scr_mark)[(addr) >> 5] |= 1 << ((addr) & 0x1F)
+
+#define PUTMEM(addr, ptr, val)  \
+{                                                \
+  register byte addrhi;                          \
+  addrhi = (dbyte) (addr) >> 8;                  \
+  if(addrhi >= 0x5B) *(ptr) = (val);             \
+  else if(addrhi & 0x40) {                       \
+    *(ptr) = (val);                              \
+    MARK_SCR((dbyte) (addr));                    \
+    if(DANM(next_scri) >= 0 && DANM(tc) > 86)    \
+       DANM(tc) -= 2;                            \
+  }                                              \
+}
+
+#define SOUNDPORT 0x10
+
+/* TODO: attribute or pixel byte is present on unused ports? */
+
+
+#define IN(porth, portl, dest) \
+{                                                                \
+    if(!((portl) & DANM(inport_mask))) {                         \
+       dest = PORT(inports)[portl];                              \
+    }                                                            \
+    else if(!((portl) & 1)) {                                    \
+       if(DANM(imp_change) > DANM(tc)) {                         \
+          DANM(imp_change) = 0;                                  \
+          DANM(ula_inport) ^= 0x40;                              \
+       }                                                         \
+       dest = SPECP(fe_inport_high)[porth] & DANM(ula_inport);   \
+       DANM(tc) -= 1;                                            \
+    }                                                            \
+    else {                                                       \
+       register int scri;                                        \
+       scri = DANM(next_scri);                                   \
+       dest = (scri < 0 || DANM(tc) <= 96)                       \
+     ? 0xFF : DANM(mem)[(scri<<5)+((224-DANM(tc))>>2)];      \
+    }                                                            \
+}
+
+
+#define OUT(porth, portl, source) \
+{                                                                \
+  if(!((portl) & 1)) {                                           \
+     if((DANM(ula_outport) ^ (source)) & SOUNDPORT) {            \
+       DANM(sound_change) = 1;                                   \
+       if((source) & SOUNDPORT) DANM(sound_sam) += DANM(tc);     \
+       else                     DANM(sound_sam) -= DANM(tc);     \
+     }                                                           \
+     DANM(ula_outport) = (source);                               \
+     DANM(tc) -= 1;                                              \
+  }                                                              \
+  PORT(outports)[portl] = (source);                              \
+}
+
+#define DI_CHECK \
+  if(PC == LOAD_DI+1 && SPNM(quick_load)) \
+     SPNM(load_trapped) = 1,            \
+     DANM(haltstate) = 1,               \
+     DANM(tc) = 0;
+