NeoGeo programming cheatsheet: Difference between revisions

Latest revision as of 03:36, 29 January 2016

Todo. What's to be included:

ROM header
68k vector table + exception stack frames
Interrupts
Memmapped registers
GPU ref + timings (Display timing)

System ROM Calls

Main Page: BIOS calls

Shared

These calls are shared between cart systems and CD systems.

Address	Short Name	Description
0xC00444	`SYSTEM_RETURN`	Returns control to the system ROM.
0xC0044A	`SYSTEM_IO`	Reads inputs and updates the relevant RAM locations.
0xC00450	`CREDIT_CHECK`
0xC00456	`CREDIT_DOWN`
0xC00468	`CARD`	Memory card handler.
0xC0046E	`CARD_ERROR`
0xC004C2	`FIX_CLEAR`	Clears most of the fix layer, aside from the left and rightmost sides.
0xC004C8	`LSP_1st`	Set up sprites.

MVS only

These calls only work properly on MVS systems.

Address	Short Name	Description
0xC0045C	`READ_CALENDAR`	Reads current calendar values into RAM.
0xC00462	`SETUP_CALENDAR`	Sets up the calendar.

CD only

These calls only work properly on CD systems.

@@ Line 1: / Line 1: @@
 Todo. What's to be included:
-*BIOS calls
+* [[68k program header|ROM header]]
-*ROM header
+* [[68k vector table]] + [[68k exception handling|exception stack frames]]
-*68k vector table + exception stack frames
+* [[68k interrupts|Interrupts]]
-*Interrupts
+* [[Memory mapped registers|Memmapped registers]]
-*Memmapped registers
+* GPU ref + timings ([[Display timing]])
-*GPU ref + timings
+==System ROM Calls==
+:''Main Page: [[BIOS calls]]''
+===Shared===
+These calls are shared between cart systems and CD systems.
+{|class="wikitable"
+! Address
+! Short Name
+! Description
+|-
+| 0xC00444
+| <code>[[SYSTEM_RETURN]]</code>
+| Returns control to the system ROM.
+|-
+| 0xC0044A
+| <code>[[SYSTEM_IO]]</code>
+| Reads inputs and updates the relevant RAM locations.
+|-
+| 0xC00450
+| <code>[[CREDIT_CHECK]]</code>
+| &nbsp;
+|-
+| 0xC00456
+| <code>[[CREDIT_DOWN]]</code>
+| &nbsp;
+|-
+| 0xC00468
+| <code>[[CARD]]</code>
+| Memory card handler.
+|-
+| 0xC0046E
+| <code>[[CARD_ERROR]]</code>
+| &nbsp;
+|-
+| 0xC004C2
+| <code>[[FIX_CLEAR]]</code>
+| Clears most of the fix layer, aside from the left and rightmost sides.
+|-
+| 0xC004C8
+| <code>[[LSP_1st]]</code>
+| Set up sprites.
+|}
+===MVS only===
+These calls only work properly on MVS systems.
+{|class="wikitable"
+! Address
+! Short Name
+! Description
+|-
+| 0xC0045C
+| <code>[[READ_CALENDAR]]</code>
+| Reads current calendar values into RAM.
+|-
+| 0xC00462
+| <code>[[SETUP_CALENDAR]]</code>
+| Sets up the calendar.
+|}
+===CD only===
+These calls only work properly on CD systems.
 [[Category:Code]]
 [[Category:Tools]]