Skip to content

-introduce hexTable with formatted byte and to helper functions toHex… #130

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
avivace merged 1 commit into from
Apr 16, 2026
Merged

-introduce hexTable with formatted byte and to helper functions toHex… #130

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
42 changes: 30 additions & 12 deletions js/main.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,7 +49,7 @@ compiler.setLogCallback(function (str, kind) {
const serial_log_buffer = [];
const serial_log_buffer_size = 256;
emulator.setSerialCallback(function (value) {
var formatted_value = ('00' + value.toString(16)).slice(-2);
var formatted_value = toHex2(value);
document.getElementById('serial_log').innerText = '$' + formatted_value;
serial_log_buffer.unshift(formatted_value);
if (serial_log_buffer.length > serial_log_buffer_size) {
Expand Down Expand Up @@ -138,21 +138,39 @@ function handleGBKey(code, down) {
}
}

const hexTable = Array.from({ length: 256 }, (_, i) => i.toString(16).padStart(2, '0'));
const toHex2 = (num) => hexTable[num & 0xff];
const toHex4 = (num) => hexTable[(num >> 8) & 0xff] + hexTable[num & 0xff];

function toHex(num, digits) {
return '$' + ('0000' + num.toString(16)).slice(-digits);
if (digits === 2) {
return '$' + toHex2(num);
} else {
return '$' + toHex4(num);
}
}

const cpuDom = {
pc: document.getElementById('cpu_pc'),
sp: document.getElementById('cpu_sp'),
a: document.getElementById('cpu_a'),
bc: document.getElementById('cpu_bc'),
de: document.getElementById('cpu_de'),
hl: document.getElementById('cpu_hl'),
flags: document.getElementById('cpu_flags'),
};

function updateCpuState(afterSingleStep) {
emulator.renderScreen();

var pc = emulator.getPC();
document.getElementById('cpu_pc').innerHTML = toHex(pc, 4);
document.getElementById('cpu_sp').innerHTML = toHex(emulator.getSP(), 4);
document.getElementById('cpu_a').innerHTML = toHex(emulator.getA(), 2);
document.getElementById('cpu_bc').innerHTML = toHex(emulator.getBC(), 4);
document.getElementById('cpu_de').innerHTML = toHex(emulator.getDE(), 4);
document.getElementById('cpu_hl').innerHTML = toHex(emulator.getHL(), 4);
document.getElementById('cpu_flags').innerHTML = emulator.getFlags();
cpuDom.pc.innerText = toHex(pc, 4);
cpuDom.sp.innerText = toHex(emulator.getSP(), 4);
cpuDom.a.innerText = toHex(emulator.getA(), 2);
cpuDom.bc.innerText = toHex(emulator.getBC(), 4);
cpuDom.de.innerText = toHex(emulator.getDE(), 4);
cpuDom.hl.innerText = toHex(emulator.getHL(), 4);
cpuDom.flags.innerText = emulator.getFlags();

var file_line_nr = addr_to_line[pc];
if (typeof file_line_nr == 'undefined') file_line_nr = addr_to_line[pc - 1];
Expand Down Expand Up @@ -228,7 +246,7 @@ function updateTextView() {
"<span style='float: left; width: 50px'>" +
reg_info.name +
':</span>' +
('00' + emulator.readMem(reg_info.value).toString(16)).slice(-2) +
toHex2(emulator.readMem(reg_info.value)) +
'<br/>';
}
display_text.innerHTML = text;
Expand All @@ -250,11 +268,11 @@ function updateTextView() {
var span = false;
var span_color = 0;
for (var n = 0; n < data.length; n += 16) {
var hex = Array.prototype.map.call(data.slice(n, n + 16), (x) => ('00' + x.toString(16)).slice(-2));
var hex = Array.prototype.map.call(data.slice(n, n + 16), (x) => toHex2(x));
var bank = ~~(n / bank_size);
var addr = n & (bank_size - 1);
if (bank > 0) addr += bank_size;
text += ('00' + bank.toString(16)).slice(-2) + ':' + ('0000' + (addr + offset).toString(16)).slice(-4);
text += toHex2(bank) + ':' + toHex4(addr + offset);
for (var idx = 0; idx < hex.length; idx++) {
text += ' ';
var new_symbol = symbols[n + idx + offset];
Expand Down
Loading