6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-12-25 18:30:21 +00:00
Code Issues Projects Releases Wiki Activity

Switches the Oric to string insertion at the time of consumption.

Browse Source 
To avoid issues around keyboard scanning being decoupled from consumption via IRQ, but not buffered. Keys pressed while BASIC is otherwise busy are just lost.
This commit is contained in:
Thomas Harte 2018-05-13 14:02:46 -04:00
parent 39c0bc6c47
commit 2252c29495
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
Machines/Oric/Oric.cpp
View File

@ -305,13 +305,11 @@ template <Analyser::Static::Oric::Target::DiskInterface disk_interface> class Co
switch(rom_type_) {
case Analyser::Static::Oric::Target::ROM::BASIC10:
tape_get_byte_address_ = 0xe630;
scan_keyboard_address_ = 0xf43c;
tape_speed_address_ = 0x67;
break;
case Analyser::Static::Oric::Target::ROM::BASIC11:
case Analyser::Static::Oric::Target::ROM::Pravetz:
tape_get_byte_address_ = 0xe6c9;
scan_keyboard_address_ = 0xf495;
tape_speed_address_ = 0x024d;
break;
}
@ -424,9 +422,12 @@ template <Analyser::Static::Oric::Target::DiskInterface disk_interface> class Co
}
}
if(string_serialiser_ && address == scan_keyboard_address_ && operation == CPU::MOS6502::BusOperation::ReadOpcode) {
m6502_.set_value_of_register(CPU::MOS6502::Register::X, string_serialiser_->head() | 0x80);
*value = 0x60;
// $02df is where the Oric ROMs — all of them, including BASIC 1.0, 1.1 and the Pravetz — have the
// IRQ routine store an incoming keystroke in order for reading to occur later. By capturing the
// read rather than the decode and write: (i) nothing is lost while BASIC is parsing; and
// (ii) keyboard input is much more rapid.
if(string_serialiser_ && address == 0x02df && operation == CPU::MOS6502::BusOperation::Read) {
*value = string_serialiser_->head() | 0x80;
if(!string_serialiser_->advance()) string_serialiser_.reset();
}
@ -576,7 +577,7 @@ template <Analyser::Static::Oric::Target::DiskInterface disk_interface> class Co
}
// ROM bookkeeping
uint16_t tape_get_byte_address_ = 0, scan_keyboard_address_ = 0, tape_speed_address_ = 0;
uint16_t tape_get_byte_address_ = 0, tape_speed_address_ = 0;
int keyboard_read_count_ = 0;
// Outputs