Dave Van Wagner
6502 emulator for Commodore 64 ROMs, serial terminal edition for MBED. Recommend terminal echo on, line edit on, caps lock, 115200bps, implicit carriage return on newline, currently non-buffered so don't paste lots of stuff
More details at:
[https://github.com/davervw] [https://techwithdave.davevw.com/2020/03/simple-emu-c64.html]
Diff: emuc64.cpp
- Revision:
- 6:0df1257f8cc1
- Parent:
- 4:0461c100cbbb
- Child:
- 7:f49fa56672d8
--- a/emuc64.cpp Sun Apr 12 19:42:12 2020 +0000
+++ b/emuc64.cpp Mon Apr 13 04:36:42 2020 +0000
@@ -771,7 +771,7 @@
byte GetMemory(ushort addr)
{
- if (addr < sizeof(ram) && (addr < basic_addr || (addr >= open_addr && addr < open_addr + open_size)))
+ if (addr <= sizeof(ram)-1 && (addr < basic_addr || (addr >= open_addr && addr < open_addr + open_size)))
return ram[addr];
else if (addr >= basic_addr && addr < basic_addr + sizeof(basic_rom))
return basic_rom[addr - basic_addr];
@@ -779,7 +779,7 @@
return color_nybles[addr - color_addr];
else if (addr >= io_addr && addr < io_addr + io_size)
return 0; // io[addr - io_addr];
- else if (addr >= kernal_addr && addr < kernal_addr + sizeof(kernal_rom))
+ else if (addr >= kernal_addr && addr <= kernal_addr + sizeof(kernal_rom)-1)
return kernal_rom[addr - kernal_addr];
else
return 0xFF;
@@ -787,7 +787,7 @@
void SetMemory(ushort addr, byte value)
{
- if (addr < sizeof(ram) && (addr < io_addr || (addr >= kernal_addr && addr < kernal_addr + sizeof(kernal_rom))))
+ if (addr < sizeof(ram) && (addr < io_addr || (addr >= kernal_addr && addr <= kernal_addr + sizeof(kernal_rom)-1)))
ram[addr] = value;
else if (addr == 0xD021) // background
;