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write rl02 (required for unix 7 to boot)

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folkert van heusden 2024-04-21 22:05:27 +02:00
parent 056681e32f
commit 9c75d94d70
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 46 additions and 10 deletions
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56
rl02.cpp
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@ -13,7 +13,6 @@
#include "utils.h"
bool flag = false;
static const char * const regnames[] = {
"control status",
"bus address",
@ -180,9 +179,6 @@ void rl02::writeWord(const uint16_t addr, uint16_t v)
}
else if (command == 4) { // read header
mpr[0] = (sector & 63) | (head << 6) | (track << 7);
DOLOG(ll_error, true, "GREP3 %06o", mpr[0]);
if (mpr[0] == 032606)
flag = true;
mpr[1] = 0; // zero
mpr[2] = 0; // TODO: CRC
@ -190,6 +186,52 @@ void rl02::writeWord(const uint16_t addr, uint16_t v)
do_int = true;
}
else if (command == 5) { // write data
uint32_t memory_address = get_bus_address();
uint32_t count = (65536l - registers[(RL02_MPR - RL02_BASE) / 2]) * 2;
if (count == 65536)
count = 0;
uint16_t temp = registers[(RL02_DAR - RL02_BASE) / 2];
sector = temp & 63;
head = (temp >> 6) & 1;
track = temp >> 7;
uint32_t temp_disk_offset = calc_offset();
DOLOG(debug, false, "RL02 write %d bytes (dec) to %d (dec) from %06o (oct) [cylinder: %d, head: %d, sector: %d]", count, temp_disk_offset, memory_address, track, head, sector);
while(count > 0) {
uint32_t cur = std::min(uint32_t(sizeof xfer_buffer), count);
if (!fhs.at(device)->write(temp_disk_offset, cur, xfer_buffer)) {
DOLOG(ll_error, true, "RL02 write error, device %d, disk offset %u, read size %u, cylinder %d, head %d, sector %d", device, temp_disk_offset, cur, track, head, sector);
break;
}
mpr[0] += count / 2;
temp_disk_offset += cur;
count -= cur;
sector++;
if (sector >= rl02_sectors_per_track) {
sector = 0;
head++;
if (head >= 2) {
head = 0;
track++;
}
}
}
do_int = true;
}
else if (command == 6 || command == 7) { // read data / read data without header check
uint32_t memory_address = get_bus_address();
@ -198,7 +240,6 @@ void rl02::writeWord(const uint16_t addr, uint16_t v)
count = 0;
uint16_t temp = registers[(RL02_DAR - RL02_BASE) / 2];
DOLOG(ll_error, true, "GREP2 %06o", temp);
sector = temp & 63;
head = (temp >> 6) & 1;
@ -206,11 +247,6 @@ void rl02::writeWord(const uint16_t addr, uint16_t v)
uint32_t temp_disk_offset = calc_offset();
DOLOG(ll_error, true, "GREP1 %02x", b->getMMR3() & 0x20);
if (flag)
printf("%06o\n", b->getCpu()->getPC());
DOLOG(debug, false, "RL02 read %d bytes (dec) from %d (dec) to %06o (oct) [cylinder: %d, head: %d, sector: %d]", count, temp_disk_offset, memory_address, track, head, sector);
// update_dar();