Based on Michel Antelme's Inventaire provisoire des caractères et divers signes des écritures khmères pré-modernes et modernes employés pour la notation du khmer, du siamois, des dialectes thaïs méridionaux, du sanskrit et du pāli. This is a work-in-progress: corrections and suggestions welcome.

Velar consonants

ka(uni1780)្ក(uni17d2+uni1780)
kha(uni1781)្ខ(uni17d2+uni1781)
ga(uni1782)្គ(uni17d2+uni1782)
gha(uni1783)្ឃ(uni17d2+uni1783)
ṅo(uni1784)្ង(uni17d2+uni1784)
ṅ̋oង៉(uni1784+uni17c9)

Palatal consonants

ca(uni1785)្ច(uni17d2+uni1785)
cha(uni1786)្ឆ(uni17d2+uni1786)
ja(uni1787)្ជ(uni17d2+uni1787)
jha(uni1788)្ឈ(uni17d2+uni1788)
ña(uni1789)្ញ(uni17d2+uni1789)
ñ̋aញ៉(uni1789+uni17c9)

Retroflex consonants

ṭa(uni178a)្ដ(uni17d2+uni178a)
ṭha(uni178b)្ឋ(uni17d2+uni178b)
ḍa(uni178c)្ឌ(uni17d2+uni178c)
ḍha(uni178d)្ឍ(uni17d2+uni178d)
ṇa(uni178e)្ណ(uni17d2+uni178e)

Dental consonants

ta(uni178f)្ត(uni17d2+uni178f)
tha(uni1790)្ថ(uni17d2+uni1790)
da(uni1791)្ទ(uni17d2+uni1791)
dha(uni1792)្ធ(uni17d2+uni1792)
na(uni1793)្ន(uni17d2+uni1793)
n̋aន៉(uni1793+uni17c9)

Labial consonants

pa(uni1794)្ប(uni17d2+uni1794)
p̋aប៉(uni1794+uni17c9)្ប៉(uni17d2+uni1794+uni17c9)
p̂aប៊(uni1794+uni17ca)្ប៊(uni17d2+uni1794+uni17ca)
pha(uni1795)្ផ(uni17d2+uni1795)
ba(uni1796)្ព(uni17d2+uni1796)
bha(uni1797)្ភ(uni17d2+uni1797)
ma(uni1798)្ម(uni17d2+uni1798)
m̋aម៉(uni1798+uni17c9)

Other consonants

ya(uni1799)្យ(uni17d2+uni1799)
y̋aយ៉(uni1799+uni17c9)
ra(uni179a)្រ(uni17d2+uni179a)
r̋aរ៉(uni179a+uni17c9)
la(uni179b)្ល(uni17d2+uni179b)
l̋aល៉(uni179b+uni17c9)
va(uni179c)្វ(uni17d2+uni179c)
v̋aវ៉(uni179c+uni17c9)
śa(uni179d)្ឝ(uni17d2+uni179d)
ṣa(uni179e)្ឞ(uni17d2+uni179e)
sa(uni179f)្ស(uni17d2+uni179f)
ŝaស៊(uni179f+uni17ca)្ស៊(uni17d2+uni179f+uni17ca)
ha(uni17a0)្ហ(uni17d2+uni17a0)
ĥaហ៊(uni17a0+uni17ca)
ḷa(uni17a1)្ឡ(uni17d2+uni17a1)
ḷ̋aឡ៉(uni17a1+uni17c9)
ˊa(uni17a2)្អ(uni17d2+uni17a2)

Vocalic signs

a:(uni17c8)
ă(uni17d0)
ā(uni17b6)
i(uni17b7)
ī(uni17b8)
(uni17b9)
ị̄(uni17ba)
u(uni17bb)
ū(uni17bc)
uo(uni17bd)
uo:ួៈ(uni17bd+uni17c8)
eiេិ(uni17c1+uni17b7)
oe(uni17be)
eị̄េឺ(uni17c1+uni17ba)
ị̄e(uni17bf)
īe(uni17c0)
e(uni17c1)
ae(uni17c2)
ai(uni17c3)
o(uni17c4)
au(uni17c5)
uṃុំ(uni17bb+uni17c6)
aṃ(uni17c6)
āṃាំ(uni17b6+uni17c6)
iṃិំ(uni17b7+uni17c6)
aḥ(uni17c7)
āḥាះ(uni17b6+uni17c7)
iḥិះ(uni17b7+uni17c7)
īḥីះ(uni17b8+uni17c7)
ịḥឹះ(uni17b9+uni17c7)
ị̄ḥឺះ(uni17ba+uni17c7)
uḥុះ(uni17bb+uni17c7)
ūḥូះ(uni17bc+uni17c7)
oeḥើះ(uni17be+uni17c7)
īeḥៀះ(uni17c0+uni17c7)
eḥេះ(uni17c1+uni17c7)
aeḥែះ(uni17c2+uni17c7)
aiḥៃះ(uni17c3+uni17c7)
oḥោះ(uni17c4+uni17c7)
auḥៅះ(uni17c5+uni17c7)

Independent vowels

i(uni17a5)្ឥ(uni17d2+uni17a5)
ī(uni17a6)
u(uni17a7)្ឧ(uni17d2+uni17a7)
û(uni17a8)
ū(uni17a9)
ūu(uni17aa)
(uni17ab)្ឫ(uni17d2+uni17ab)
r̥̄(uni17ac)
(uni17ad)
l̥̄(uni17ae)
e(uni17af)្ឯ(uni17d2+uni17af)
ai(uni17b0)
oឱ ឲ(uni17b1) (uni17b2)
au(uni17b3)

Diacritic signs

dhmeña kaṇtura, samlāp’ bīra, mūsikadaṇḍamuusikatoan(uni17c9)
trīsăbda, sak’ katriisap(uni17ca)
pantak’, samlāp’, saṅkat’, rassasaññābantoc(uni17cb)
lekha astā, lekha prāṃ pīahsda(uni17cf)
daṇḍaghāta, saññā paṭisedha, kanduya kaṇtura, kanduya kaṃprukatoandakhiat(uni17cd)
rapāda, repha:robat(uni17cc)
kākapāda, joeṅa k’aekakakabat(uni17ce)
’aḍḍhacandaatthacan(uni17dd)
virāmaviriam(uni17d1)៑︀(uni17d1+unife00)[1]
’avagraha:avakrahasanya(uni17dc)
m̋ai domai do(not in unicode)
m̋ai citvā, lekha prāṃ bil, rājapaksīmai citva(not in unicode)

Numbers

0son(uni17e0)
1muoy(uni17e1)
2pii(uni17e2)
3bei(uni17e3)
4buon(uni17e4)
5pram(uni17e5)
6pram-muoy(uni17e6)
7pram-pii(uni17e7)
8pram-bei(uni17e8)
9pram-buon(uni17e9)
0lek-attak-son(uni17f0)
1lek-attak-muoy(uni17f1)
2lek-attak-pii(uni17f2)
3lek-attak-bei(uni17f3)
4lek-attak-buon(uni17f4)
5lek-attak-pram(uni17f5)
6lek-attak-pram-muoy(uni17f6)
7lek-attak-pram-pii(uni17f7)
8lek-attak-pram-bei(uni17f8)
9lek-attak-pram-buon(uni17f9)

Punctuation signs

lek-too(uni17d7)
khan(uni17d4)
bariyoosan(uni17d5)
beyyal(uni17d8) (uni17d7+uni179b+uni17d7)
beyyal(not in unicode)(uni17d7+uni1794+uni17c1+uni17d7)
phnaek-muan(uni17d9)
banga-muan(not in unicode)
koomuut(uni17da)
camnuc-pii-kuuh(uni17d6)

National currency symbol

riel(uni17db)
riel_comma(not in unicode)

Additional characters needed for typesetting siamese language in khmer script

ba_ba(not in unicode)
pha_pha(not in unicode)