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cdromdrive: convert MSF values to BCD.

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This commit is contained in:
Maxim Poliakovski 2024-07-11 21:25:40 +02:00
parent f31c71e430
commit a81156c3e3
2 changed files with 13 additions and 3 deletions
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13
devices/storage/cdromdrive.cpp
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@ -1,6 +1,6 @@
/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-23 divingkatae and maximum
Copyright (C) 2018-24 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
@ -138,8 +138,17 @@ uint32_t CdromDrive::report_capacity(uint8_t *data_ptr) {
return 8;
}
uint8_t CdromDrive::hex_to_bcd(const uint8_t val) {
uint8_t hi = val / 10;
uint8_t lo = val % 10;
return (hi << 4) | lo;
}
AddrMsf CdromDrive::lba_to_msf(const int lba) {
return {lba / 4500, /*.min*/ (lba / 75) % 60, /*.sec*/ lba % 75 /*.frm*/};
return {hex_to_bcd( lba / 4500), /*.min*/
hex_to_bcd((lba / 75) % 60), /*.sec*/
hex_to_bcd( lba % 75) /*.frm*/
};
}
uint32_t CdromDrive::read_toc(uint8_t *cmd_ptr, uint8_t *data_ptr) {

3
devices/storage/cdromdrive.h
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@ -1,6 +1,6 @@
/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-23 divingkatae and maximum
Copyright (C) 2018-24 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
@ -69,6 +69,7 @@ public:
protected:
std::function<void(uint8_t, uint8_t)> set_error;
uint8_t hex_to_bcd(const uint8_t val);
AddrMsf lba_to_msf(const int lba);
TrackDescriptor tracks[CDROM_MAX_TRACKS];