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Restrict video buffer to first 512kb.

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This commit is contained in:
Thomas Harte 2024-04-01 21:39:10 -04:00
parent 7c9715f00c
commit 3b62a2fe7a
1 changed files with 5 additions and 4 deletions
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9
Machines/Acorn/Archimedes/Video.hpp
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@ -124,6 +124,7 @@ struct Video {
if(vertical_state_.position == vertical_timing_.period) { if(vertical_state_.position == vertical_timing_.period) {
vertical_state_.position = 0; vertical_state_.position = 0;
address_ = frame_start_; address_ = frame_start_;
if(address_ == buffer_end_) address_ = buffer_start_;
entered_sync_ = true; entered_sync_ = true;
interrupt_observer_.update_interrupts(); interrupt_observer_.update_interrupts();
@ -281,10 +282,10 @@ struct Video {
return interrupt; return interrupt;
} }
void set_frame_start(uint32_t address) { frame_start_ = address; } void set_frame_start(uint32_t address) { frame_start_ = address & 0x7'ffff; }
void set_buffer_start(uint32_t address) { buffer_start_ = address; } void set_buffer_start(uint32_t address) { buffer_start_ = address & 0x7'ffff; }
void set_buffer_end(uint32_t address) { buffer_end_ = address; } void set_buffer_end(uint32_t address) { buffer_end_ = address & 0x7'ffff; }
void set_cursor_start(uint32_t address) { cursor_start_ = address; } void set_cursor_start(uint32_t address) { cursor_start_ = address & 0x7'ffff; }
Outputs::CRT::CRT &crt() { return crt_; } Outputs::CRT::CRT &crt() { return crt_; }
const Outputs::CRT::CRT &crt() const { return crt_; } const Outputs::CRT::CRT &crt() const { return crt_; }