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constant names

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This commit is contained in:
folkert van heusden 2024-06-13 17:53:15 +02:00
parent 77dbd486d2
commit 4dab0829e9
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 30 additions and 15 deletions
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27
rp06.cpp
View file

@ -17,7 +17,7 @@
constexpr const unsigned NSECT = 22; // sectors per track
constexpr const unsigned NTRAC = 19; // tracks per cylinder
constexpr const unsigned SECTOR_SIZE = 512;
constexpr const uint16_t default_DS = 0400 /* drive present */ | 010000 /* medium on-line */ | 0100 /* volume valid */ | 0200 /* drive ready */;
constexpr const uint16_t default_DS = uint16_t(rp06::ds_bits::DPR) /* drive present */ | uint16_t(rp06::ds_bits::MOL) /* medium on-line */ | uint16_t(rp06::ds_bits::VV) /* volume valid */ | uint16_t(rp06::ds_bits::DRY) /* drive ready */;
constexpr const char *regnames[] { "Control", "Status", "Error register 1", "Maintenance", "Attention summary", "Desired sector/track address", "Error register 1", "Look ahead", "Drive type", "Serial no", "Offset", "Desired cylinder address", "Current cylinder address", "Error register 2", "Error register 3", "ECC position", "ECC pattern" };
@ -79,9 +79,9 @@ uint16_t rp06::read_word(const uint16_t addr)
uint16_t value = registers[reg];
if (addr == RP06_CS1)
value |= 0200 /* ready */;
value |= uint16_t(rp06::cs1_bits::RDY /* ready */);
else if (addr == RP06_DS)
value |= 0400 /* drive present */ | 010000 /* medium on-line */ | 0100 /* volume valid */ | 0200 /* drive ready */;
value |= default_DS;
TRACE("RP06: read \"%s\"/%o: %06o", regnames[reg], addr, value);
@ -128,12 +128,9 @@ uint32_t rp06::compute_offset() const
uint32_t rp06::getphysaddr() const
{
constexpr const uint16_t A16 = 0400;
constexpr const uint16_t A17 = 01000;
// low 16 bits in UBA, and tack on A16/A17
bool cur_A16 = registers[reg_num(RP06_CS1)] & A16;
bool cur_A17 = registers[reg_num(RP06_CS1)] & A17;
bool cur_A16 = registers[reg_num(RP06_CS1)] & uint16_t(rp06::cs1_bits::A16);
bool cur_A17 = registers[reg_num(RP06_CS1)] & uint16_t(rp06::cs1_bits::A17);
uint16_t cur_A1621 = 0;
@ -158,20 +155,20 @@ void rp06::write_word(const uint16_t addr, uint16_t v)
registers[reg] = v;
if (addr == RP06_CS1) {
if (registers[reg_num(RP06_CS1)] & 0200) // ready
if (registers[reg_num(RP06_CS1)] & uint16_t(rp06::cs1_bits::RDY)) // ready
registers[reg_num(RP06_AS)] = 1; // this is very bogus but maybe works for now
if (v & 1) {
bool generate_interrupt = false;
int function_code = v & 62;
bool generate_interrupt = false;
uint16_t function_code = v & 62;
registers[reg_num(RP06_CS1)] &= ~(function_code | 1 | 040000);
registers[reg_num(RP06_CS1)] &= ~(function_code | 1 | uint16_t(rp06::cs1_bits::TRE));
if (function_code == 006 || function_code == 012 || function_code == 016 ||
function_code == 020 || function_code == 022) {
DOLOG(debug, false, "RP06: ignoring command %03o", function_code);
registers[reg_num(RP06_CS1)] |= 0200; // drive ready
registers[reg_num(RP06_CS1)] |= uint16_t(rp06::cs1_bits::RDY); // drive ready
generate_interrupt = true;
}
@ -201,7 +198,7 @@ void rp06::write_word(const uint16_t addr, uint16_t v)
}
registers[reg_num(RP06_WC)] = 0;
registers[reg_num(RP06_CS1)] |= 0200; // drive ready
registers[reg_num(RP06_CS1)] |= uint16_t(rp06::cs1_bits::RDY); // drive ready
generate_interrupt = true;
}
@ -210,7 +207,7 @@ void rp06::write_word(const uint16_t addr, uint16_t v)
}
if (generate_interrupt) {
if (registers[reg_num(RP06_CS1)] & 0100) // IE? (interrupt enable)
if (registers[reg_num(RP06_CS1)] & uint16_t(rp06::cs1_bits::IE)) // IE? (interrupt enable)
b->getCpu()->queue_interrupt(5, 0254);
}
}

18
rp06.h
View file

@ -66,4 +66,22 @@ public:
void write_byte(const uint16_t addr, const uint8_t v) override;
void write_word(const uint16_t addr, const uint16_t v) override;
enum class ds_bits {
OFM = 0000001, // offset mode
VV = 0000100, // volume valid
DRY = 0000200, // drive ready
DPR = 0000400, // drive present
MOL = 0010000 // medium online
};
enum class cs1_bits {
GO = 0000001, // GO bit
FN = 0000076, // 5 bit function code - this is the mask
IE = 0000100, // Interrupt enable
RDY = 0000200, // Drive ready
A16 = 0000400,
A17 = 0001000,
TRE = 0040000,
};
};