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polmon: add r command

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This commit is contained in:
Paul Mathieu
2025-10-01 14:45:45 +02:00
parent 59f49a232e
commit 6a69215c90
1 changed files with 34 additions and 1 deletions
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35
polmon.cc
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@@ -12,6 +12,7 @@
#define INT80H 0 #define INT80H 0
#define SHOWTITLE 0 #define SHOWTITLE 0
#define BOOTSTRAP 0 #define BOOTSTRAP 0
#define LAUNCH 0
#endif // WOZMON #endif // WOZMON
#ifndef BACKSPACE #ifndef BACKSPACE
@@ -38,6 +39,10 @@
#define BOOTSTRAP 1 #define BOOTSTRAP 1
#endif #endif
#ifndef LAUNCH
#define LAUNCH 1
#endif
namespace { namespace {
#if WOZMON #if WOZMON
@@ -213,6 +218,22 @@ void Status(uint8_t status) {
: "ax", "bh", "dx", "cx", "di", "cc"); : "ax", "bh", "dx", "cx", "di", "cc");
} }
void LaunchFile(const char* name) {
constexpr uint16_t kSegment = 0x200;
constexpr uint16_t kAddress = 0x100;
constexpr uint16_t kFlatAddress = (kSegment << 4) + kAddress;
asm volatile("mov %1, %%ax \n\t"
"push %%ax \n\t"
"mov %0, %%ax \n\t"
"push %%ax \n\t"
"mov $04, %%ah \n\t"
"int $0x80 \n\t"
"ljmp %2,%3" ::"rmi"(name),
"rmi"(kFlatAddress), "i"(kSegment), "i"(kAddress)
: "ax", "memory");
}
bool ParseCommand(const char* buf, uint16_t& cur_addr, uint16_t& cur_seg) { bool ParseCommand(const char* buf, uint16_t& cur_addr, uint16_t& cur_seg) {
bool dump = true; bool dump = true;
for (const char* ptr = buf; *ptr;) { for (const char* ptr = buf; *ptr;) {
@@ -259,7 +280,19 @@ bool ParseCommand(const char* buf, uint16_t& cur_addr, uint16_t& cur_seg) {
dump = false; dump = false;
ClearScreen(); ClearScreen();
ptr++; ptr++;
#endif #endif // CLEARSCREENCMD
#if LAUNCH
} else if (*ptr == 'r') {
dump = false;
ptr++;
int l = 0;
for (; ptr[l]; l++) {
}
if (l >= 11) {
LaunchFile(ptr);
}
ptr += l;
#endif // LAUNCH
} else if (*ptr == 'w') { } else if (*ptr == 'w') {
dump = false; dump = false;
uint16_t addr = cur_addr; uint16_t addr = cur_addr;