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Added read/write escape clauses if faced with a read-only disk.

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This commit is contained in:
Thomas Harte 2017-08-14 12:53:18 -04:00
parent 334872d374
commit 0da02d3902
1 changed files with 15 additions and 3 deletions
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18
Components/8272/i8272.cpp
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@ -302,8 +302,6 @@ void i8272::posit_event(int event_type) {
read_write_find_header:
// 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.
if(!dma_mode_) SetNonDMAExecution();
SET_DRIVE_HEAD_MFM();
LOAD_HEAD();
cylinder_ = command_[2];
head_ = command_[3];
@ -347,6 +345,8 @@ void i8272::posit_event(int event_type) {
// Performs the read data or read deleted data command.
read_data:
printf("Read data [%02x %02x %02x %02x ... %02x]\n", command_[2], command_[3], command_[4], command_[5], command_[8]);
if(!dma_mode_) SetNonDMAExecution();
SET_DRIVE_HEAD_MFM();
read_next_data:
goto read_write_find_header;
@ -412,7 +412,14 @@ void i8272::posit_event(int event_type) {
goto post_st012chrn;
write_data:
printf("Write [deleted] data\n");
printf("Write [deleted] data\n");
if(!dma_mode_) SetNonDMAExecution();
SET_DRIVE_HEAD_MFM();
if(drives_[active_drive_].drive->get_is_read_only()) {
SetNotWriteable();
goto abort_read_write;
}
write_next_data:
goto read_write_find_header;
@ -512,6 +519,11 @@ void i8272::posit_event(int event_type) {
printf("Format track\n");
if(!dma_mode_) SetNonDMAExecution();
SET_DRIVE_HEAD_MFM();
if(drives_[active_drive_].drive->get_is_read_only()) {
SetNotWriteable();
goto abort_read_write;
}
LOAD_HEAD();
// Wait for the index hole.