From 53f81555eadfc8afa9d9708e4f9c551a3eae7e1b Mon Sep 17 00:00:00 2001 From: tudnai Date: Wed, 29 Apr 2020 16:18:27 -0700 Subject: [PATCH] - Removed 16K LC RAM -- using 64K AUX to emulate it - Removed 12K ROM -- using 16K ROM to emulate it --- src/cpu/6502.c | 7 +++---- src/dev/mem/mmio.h | 39 +++++++++++++++++++-------------------- 2 files changed, 22 insertions(+), 24 deletions(-) diff --git a/src/cpu/6502.c b/src/cpu/6502.c index 440c4df..f6de50f 100644 --- a/src/cpu/6502.c +++ b/src/cpu/6502.c @@ -886,15 +886,14 @@ void rom_loadFile( const char * bundlePath, const char * filename ) { else if ( flen == 16 * KB ) { read_rom( bundlePath, filename, Apple2_16K_ROM, 0); - memcpy(Apple2_12K_ROM + 0x0000, Apple2_16K_ROM + 0x1000, sizeof(Apple2_12K_ROM)); - memcpy(Apple2_64K_RAM + 0xC000, Apple2_16K_ROM, 0x1000); + memcpy(Apple2_64K_RAM + 0xC000, Apple2_16K_ROM, 16 * KB); SWITCH_CX_ROM( RAM_PG_RD_TBL, 0xC0, Apple2_16K_ROM, 0x00); } else if ( flen == 12 * KB ) { - read_rom( bundlePath, filename, Apple2_12K_ROM, 0); - memcpy(Apple2_64K_RAM + 0xD000, Apple2_12K_ROM, sizeof(Apple2_12K_ROM)); + read_rom( bundlePath, filename, Apple2_16K_ROM, 0x1000); + memcpy(Apple2_64K_RAM + 0xD000, Apple2_16K_ROM + 0x1000, 12 * KB); } // read_rom( bundlePath, "Apple2Plus.rom", Apple2_12K_ROM, 0); diff --git a/src/dev/mem/mmio.h b/src/dev/mem/mmio.h index 1a17c63..add9a19 100644 --- a/src/dev/mem/mmio.h +++ b/src/dev/mem/mmio.h @@ -29,11 +29,12 @@ videoMode_t videoMode = { 1 }; // 40 col text, page 1 uint8_t Apple2_Dummy_Page[ 1 * PG ]; // Dummy Page for discarding data uint8_t Apple2_Dummy_RAM[ 4 * KB ]; // Dummy RAM for discarding data -uint8_t Apple2_12K_ROM[ 12 * KB ] = {0}; // ROM D0, D8, E0, E8, F0, F8 + uint8_t Apple2_16K_ROM[ 16 * KB ] = {0}; // ROM C0, C8, D0, D8, E0, E8, F0, F8 -uint8_t Apple2_16K_RAM[ 16 * KB ] = {0}; // 16K Memory Expansion Card + uint8_t Apple2_64K_AUX[ 64 * KB ] = {0}; // 64K Expansion Memory uint8_t Apple2_64K_RAM[ 64 * KB ] = {0}; // Main Memory +uint8_t Apple2_64K_CUR[ 64 * KB ] = {0}; // Current Copy of Memory //uint8_t * AUX_VID_RAM = Apple2_VID_AUX; // Pointer to Auxiliary Video Memory uint8_t * const AUX = Apple2_64K_AUX; // Pointer to the auxiliary memory so we can use this from Swift @@ -181,9 +182,9 @@ uint8_t * RAM_PG_RD_TBL[256] = { // I/O Addresses DEF_RAM_PAGE16( Apple2_64K_RAM, 0xC0), // Reading from the ROM - DEF_RAM_PAGE16( Apple2_12K_ROM, 0x00), // D0 - DEF_RAM_PAGE16( Apple2_12K_ROM, 0x10), // E0 - DEF_RAM_PAGE16( Apple2_12K_ROM, 0x20) // F0 + DEF_RAM_PAGE16( Apple2_16K_ROM, 0x10), // D0 + DEF_RAM_PAGE16( Apple2_16K_ROM, 0x20), // E0 + DEF_RAM_PAGE16( Apple2_16K_ROM, 0x30) // F0 }; uint8_t * RAM_PG_WR_TBL[256] = { @@ -354,9 +355,9 @@ void resetMemory() { // I/O Addresses SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xC0, Apple2_64K_RAM, 0xC0) // Reading from the ROM - SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xD0, Apple2_12K_ROM, 0x00) // D0 - SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xE0, Apple2_12K_ROM, 0x10) // E0 - SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xF0, Apple2_12K_ROM, 0x20) // F0 + SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xD0, Apple2_16K_ROM, 0x10) // D0 + SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xE0, Apple2_16K_ROM, 0x20) // E0 + SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xF0, Apple2_16K_ROM, 0x30) // F0 // 48K main memory SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0x00, Apple2_64K_RAM, 0x00) @@ -392,8 +393,6 @@ void resetMemory() { memset( AUX, 0, sizeof(Apple2_64K_AUX) ); // 64K Main Memory Area memset( RAM, 0, sizeof(Apple2_64K_RAM) ); - // 16K Memory Expansion - memset( RAM, 0, sizeof(Apple2_16K_RAM) ); // I/O area should be 0 -- just in case we decide to init RAM with a different pattern... memset( RAM + 0xC000, 0, 0x1000 ); @@ -546,7 +545,7 @@ INLINE uint8_t ioRead( uint16_t addr ) { case io_MEM_RDROM_NOWR_1: case io_MEM_RDRAM_WRAM_1: if ( MEMcfg.RAM_16K || MEMcfg.RAM_128K ) { - uint8_t * RAM_BANK = Apple2_16K_RAM; + uint8_t * RAM_BANK = Apple2_64K_AUX + 0xC000; // RAM Bank 1 or 2? switch (addr) { @@ -555,12 +554,12 @@ INLINE uint8_t ioRead( uint16_t addr ) { case io_MEM_RDROM_NOWR_2: case io_MEM_RDRAM_WRAM_2: MEMcfg.RAM_BANK_2 = 1; - RAM_BANK = Apple2_16K_RAM + 0x30; + RAM_BANK = Apple2_64K_AUX + 0xD000; break; default: MEMcfg.RAM_BANK_2 = 0; - RAM_BANK = Apple2_16K_RAM; + RAM_BANK = Apple2_64K_AUX + 0xC000; break; } @@ -573,16 +572,16 @@ INLINE uint8_t ioRead( uint16_t addr ) { MEMcfg.RD_RAM = 1; // set the RAM extension to read on the upper memory area SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xD0, RAM_BANK, 0x00 ); - SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xE0, Apple2_16K_RAM, 0x10 ); - SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xF0, Apple2_16K_RAM, 0x20 ); + SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xE0, Apple2_64K_AUX, 0xE0 ); + SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xF0, Apple2_64K_AUX, 0xF0 ); break; default: MEMcfg.RD_RAM = 0; // set the ROM to read on the upper memory area - SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xD0, Apple2_12K_ROM, 0x00 ); - SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xE0, Apple2_12K_ROM, 0x10 ); - SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xF0, Apple2_12K_ROM, 0x20 ); + SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xD0, Apple2_16K_ROM, 0x10 ); + SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xE0, Apple2_16K_ROM, 0x20 ); + SWITCH_RAM_PAGE16( RAM_PG_RD_TBL, 0xF0, Apple2_16K_ROM, 0x30 ); break; } @@ -595,8 +594,8 @@ INLINE uint8_t ioRead( uint16_t addr ) { MEMcfg.WR_RAM = 1; // set the RAM extension to read from the upper memory area SWITCH_RAM_PAGE16( RAM_PG_WR_TBL, 0xD0, RAM_BANK, 0x00 ); - SWITCH_RAM_PAGE16( RAM_PG_WR_TBL, 0xE0, Apple2_16K_RAM, 0x10 ); - SWITCH_RAM_PAGE16( RAM_PG_WR_TBL, 0xF0, Apple2_16K_RAM, 0x20 ); + SWITCH_RAM_PAGE16( RAM_PG_WR_TBL, 0xE0, Apple2_64K_AUX, 0xE0 ); + SWITCH_RAM_PAGE16( RAM_PG_WR_TBL, 0xF0, Apple2_64K_AUX, 0xF0 ); break; default: