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Implemented read deleted data.

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This commit is contained in:
Thomas Harte 2017-08-12 13:01:17 -04:00
parent a4ee697ed1
commit 4909325e79
1 changed files with 8 additions and 13 deletions
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21
Components/8272/i8272.cpp
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@ -139,7 +139,7 @@ void i8272::set_disk(std::shared_ptr<Storage::Disk::Disk> disk, int drive) {
#define FIND_DATA() \
CONCAT(find_data, __LINE__): WAIT_FOR_EVENT((int)Event::Token | (int)Event::IndexHole); \
if(event_type == (int)Event::Token && get_latest_token().type != Token::Data) goto CONCAT(find_data, __LINE__);
if(event_type == (int)Event::Token && get_latest_token().type != Token::Data && get_latest_token().type != Token::DeletedData) goto CONCAT(find_data, __LINE__);
#define READ_HEADER() \
distance_into_section_ = 0; \
@ -204,14 +204,10 @@ void i8272::posit_event(int event_type) {
switch(command_[0] & 0x1f) {
case 0x06: // read data
if(command_.size() < 9) goto wait_for_complete_command_sequence;
main_status_ &= ~StatusRequest;
goto read_data;
case 0x0b: // read deleted data
if(command_.size() < 9) goto wait_for_complete_command_sequence;
main_status_ &= ~StatusRequest;
goto read_deleted_data;
goto read_data;
case 0x05: // write data
if(command_.size() < 9) goto wait_for_complete_command_sequence;
@ -282,9 +278,9 @@ void i8272::posit_event(int event_type) {
goto invalid;
}
// Performs the read data command.
// Performs the read data or read deleted data command.
read_data:
printf("Read data, sector %02x %02x %02x %02x\n", command_[2], command_[3], command_[4], command_[5]);
printf("Read [deleted?] data, sector %02x %02x %02x %02x\n", command_[2], command_[3], command_[4], command_[5]);
// Establishes the drive and head being addressed, and whether in double density mode; populates the internal
// cylinder, head, sector and size registers from the command stream.
@ -308,9 +304,12 @@ void i8272::posit_event(int event_type) {
READ_HEADER();
if(header_[0] != cylinder_ || header_[1] != head_ || header_[2] != sector_ || header_[3] != size_) goto find_next_sector;
// Finds the next data block and sets data mode to reading.
// Finds the next data block and sets data mode to reading, setting an error flag if the on-disk deleted
// flag doesn't match the sort the command was looking for.
FIND_DATA();
distance_into_section_ = 0;
if((get_latest_token().type == Token::Data) != ((command_[0]&0xf) != 0x6))
status_[2] |= 0x40;
set_data_mode(Reading);
// Waits for the next token, then supplies it to the CPU by: (i) setting data request and direction; and (ii) resetting
@ -349,10 +348,6 @@ void i8272::posit_event(int event_type) {
status_[0] = 0x40;
goto post_st012chrn;
read_deleted_data:
printf("Read deleted data unimplemented!!\n");
goto wait_for_command;
write_data:
printf("Write data unimplemented!!\n");
goto wait_for_command;