From f1de771d882ae3848b500b6f558f7307b740b3cd Mon Sep 17 00:00:00 2001
From: ryo <ryo@nopwd.lol>
Date: Mon, 30 Dec 2024 16:15:09 +0000
Subject: Initial commit
---
demos/add.asm | 11 +++++++
demos/inp.asm | 9 ++++++
demos/test.asm | 22 ++++++++++++++
mmasm.py | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 132 insertions(+)
create mode 100644 demos/add.asm
create mode 100644 demos/inp.asm
create mode 100644 demos/test.asm
create mode 100644 mmasm.py
diff --git a/demos/add.asm b/demos/add.asm
new file mode 100644
index 0000000..0185625
--- /dev/null
+++ b/demos/add.asm
@@ -0,0 +1,11 @@
+ ORG 30
+ LDA X I
+ ADD Y /simple comment
+ STA S / another one
+ HLT
+
+X, HEX 1A
+Y, DEC -23
+S, DEC 0
+
+ END
diff --git a/demos/inp.asm b/demos/inp.asm
new file mode 100644
index 0000000..bdec386
--- /dev/null
+++ b/demos/inp.asm
@@ -0,0 +1,9 @@
+ ORG 12
+LINP, SKI / check input flag
+ BUN LINP
+ inp
+ OUT /output character
+ sta CHR i
+ HLT
+CHR,
+ HEX B42
diff --git a/demos/test.asm b/demos/test.asm
new file mode 100644
index 0000000..2b03cc2
--- /dev/null
+++ b/demos/test.asm
@@ -0,0 +1,22 @@
+ org 38
+
+ lda num1 i
+lop, add num2 / add in loop
+ isz ctr
+ bun lop
+ sta sum / save ac to sum
+
+ hlt
+
+ctr, dec -5
+num1, hex a1
+sum, hex 0
+
+num2, dec 21
+ org 9f
+ hex c4b5
+ dec -70
+ hex 43
+ hex d89a
+
+ end
diff --git a/mmasm.py b/mmasm.py
new file mode 100644
index 0000000..973aafa
--- /dev/null
+++ b/mmasm.py
@@ -0,0 +1,90 @@
+import sys
+
+if len(sys.argv) != 2:
+ print("no source file")
+ sys.exit(1)
+
+lines = []
+with open(sys.argv[1], 'r') as file:
+ lines = file.readlines()
+
+opcodes = {
+ "AND": 0, "ADD": 1, "LDA": 2, "STA": 3, "BUN": 4, "BSA": 5, "ISZ": 6,
+ "CLA": 0x7800, "CLE": 0x7400, "CMA": 0x7200, "CME": 0x7100, "CIR": 0x7080,
+ "CIL": 0x7040, "INC": 0x7020, "SPA": 0x7010, "SNA": 0x7008, "SZA": 0x7004,
+ "SZE": 0x7002, "HLT": 0x7001, "INP": 0xF800, "OUT": 0xF400, "SKI": 0xF200,
+ "SKO": 0xF100, "ION": 0xF080, "IOF": 0xF040
+}
+labels = {}
+
+# collect all labels in the file
+lc = 0
+for i, line in enumerate(lines):
+ comment_index = line.find('/')
+ if (comment_index != -1):
+ line = line[:comment_index]
+ lines[i] = lines[i][:comment_index]
+
+ parts = line.split()
+
+ if (len(parts) == 0):
+ continue
+
+ if (parts[0][-1] == ','):
+ labels[parts[0][:-1]] = lc
+ k = line.find(',')
+ lines[i] = lines[i][k+1:]
+
+ lines[i] = lines[i].strip()
+
+ if (parts[0].upper() == "ORG"):
+ lc = int(parts[1], 16)
+ continue
+
+ lc += 1
+
+print(labels)
+# print hex equivalent line by line
+lc = 0
+for line in lines:
+ parts = line.split()
+ n = len(parts)
+ if (n == 0): continue
+ ins = -1
+
+ parts[0] = parts[0].upper()
+ match parts[0]:
+ case "ORG":
+ lc = int(parts[1], 16)
+ continue
+ case "HEX":
+ ins = int(parts[1], 16)
+ n = 0
+ case "DEC":
+ ins = int(parts[1])
+ n = 0
+ case "END":
+ break
+
+ if n > 0:
+ if parts[0] not in opcodes:
+ print(f"line {lines.index(line)}: {line}")
+ print("error: wrong mnemonic")
+ break;
+ ins = opcodes[parts[0]]
+ if n > 2:
+ parts[2] = parts[2].upper()
+ if parts[2] == 'I': ins += 8;
+ if n > 1:
+ if parts[1] not in labels:
+ print(f"line {lines.index(line)}: {line}")
+ print("error: label not found")
+ break;
+ ins = ins << 12
+ ins = ins | labels[parts[1]]
+
+ if ins != -1:
+ print(f"{lc:03x}: {ins & 0xffff:04x}")
+
+ lc += 1
+
--
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