From 92ebacf4087babc3766b736aefa99fcaf7b89856 Mon Sep 17 00:00:00 2001
From: Astatin <git@astatin.live>
Date: Fri, 6 Jun 2025 12:27:51 +0200
Subject: Adding substractions parameters + inv param macro + banked symbols

---
 main.go       |  8 +++++++-
 parameters.go | 27 +++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/main.go b/main.go
index 546cfbc..b118b74 100644
--- a/main.go
+++ b/main.go
@@ -21,7 +21,13 @@ type ProgramState struct {
 
 func printSymbols(labels map[string]uint) {
 	for key, value := range labels {
-		fmt.Printf("00:%04x %s\n", value, key)
+		if value < 0x4000 {
+			fmt.Printf("00:%04x %s\n", value, key)
+		} else {
+			bank := value / 0x4000
+			addr := value%0x4000 + 0x4000
+			fmt.Printf("%02x:%04x %s\n", bank, addr, key)
+		}
 	}
 }
 
diff --git a/parameters.go b/parameters.go
index 48d053d..06202f9 100644
--- a/parameters.go
+++ b/parameters.go
@@ -113,6 +113,13 @@ func Raw8(
 		}
 		return uint16(v & 0xff), nil
 	}
+	if strings.HasPrefix(param, "inv(") && strings.HasSuffix(param, ")") {
+		v, err := Raw8(labels, lastAbsoluteLabel, defs, param[4:len(param)-1])
+		if err != nil {
+			return 0, err
+		}
+		return uint16((256 / v) & 0xff), nil
+	}
 	if strings.HasPrefix(param, "$") {
 		param = strings.ToUpper(strings.TrimPrefix(param, "$"))
 		if res, err := strconv.ParseUint(param, 16, 16); err == nil {
@@ -165,6 +172,26 @@ func Raw16(
 	defs *Definitions,
 	param string,
 ) (uint16, error) {
+	if strings.Contains(param, "-") {
+		spl := strings.Split(param, "-")
+
+		v, err := Raw16(labels, lastAbsoluteLabel, defs, spl[0])
+		if err != nil {
+			return 0, err
+		}
+		result := v
+
+		for _, arg := range spl[1:] {
+			v, err := Raw16(labels, lastAbsoluteLabel, defs, arg)
+			if err != nil {
+				return 0, err
+			}
+			result -= v
+		}
+
+		return result, nil
+	}
+
 	if strings.HasPrefix(param, "$") {
 		param = strings.ToUpper(strings.TrimPrefix(param, "$"))
 		if res, err := strconv.ParseUint(param, 16, 16); err == nil {
-- 
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