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withdrawal of the 'copper' suggestion

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minjaesong
2022-02-27 00:21:31 +09:00
parent 62077ea5e6
commit 91c9fcea10
1 changed files with 8 additions and 6 deletions
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14
terranmon.txt
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@@ -171,11 +171,11 @@ From the start of the memory space:
framebuffer scroll X framebuffer scroll X
2 bytes 2 bytes
framebuffer scroll Y framebuffer scroll Y
2 bytes 896 bytes
horizontal scroll offset for scanlines
234 bytes
unused unused
1128 bytes 1920
"copper" instructions (282 words)
1920 bytes
mapped to font ROM mapped to font ROM
Font Mapping area holds 128 characters in consecutive order, each character is always 15 bytes. Font Mapping area holds 128 characters in consecutive order, each character is always 15 bytes.
2 bytes 2 bytes
@@ -192,7 +192,9 @@ From the start of the memory space:
(DRAFT) Optional Sprite Card (VRAM Bank 1 (256 kB)) (DRAFT) Optional Sprite Card (VRAM Bank 1 (256 kB))
250880 bytes 250880 bytes
Secondary framebuffer One of:
Secondary layer
Other 8-bit of the primary framebuffer (4K colour mode)
SPRITE FORMAT DRAFT 1 SPRITE FORMAT DRAFT 1
@@ -254,7 +256,7 @@ MMIO
Text-mode-font-ROM is immutable and does not belong to VRAM Text-mode-font-ROM is immutable and does not belong to VRAM
Even in the text mode framebuffer is still being drawn onto the screen, and the texts are drawn on top of it Even in the text mode framebuffer is still being drawn onto the screen, and the texts are drawn on top of it
Copper Commands Copper Commands (suggestion withdrawn)
WAITFOR 3,32 WAITFOR 3,32
80·03 46 00 (0x004603: offset on the framebuffer) 80·03 46 00 (0x004603: offset on the framebuffer)