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https://github.com/hsoft/collapseos.git
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92ddc7ebc1
Not much of a gain in terms of usability (a bit of a loss in fact, things are a bit slow and glitchy), but it's a necessary move if we want to use upcoming grid-enabled userspace apps, such as a visual text editor.
70 lines
1.2 KiB
NASM
70 lines
1.2 KiB
NASM
; 8K of onboard RAM
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.equ RAMSTART 0xc000
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; Memory register at the end of RAM. Must not overwrite
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.equ RAMEND 0xfdd0
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jp init
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.fill 0x66-$
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retn
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.inc "err.h"
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.inc "ascii.h"
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.inc "core.asm"
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.inc "str.asm"
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.equ PAD_RAMSTART RAMSTART
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.inc "sms/pad.asm"
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.inc "sms/vdp.asm"
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.equ GRID_RAMSTART PAD_RAMEND
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.equ GRID_COLS VDP_COLS
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.equ GRID_ROWS VDP_ROWS
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.equ GRID_SETCELL vdpSetCell
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.equ GRID_GETC padGetC
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.inc "grid.asm"
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.equ STDIO_RAMSTART GRID_RAMEND
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.equ STDIO_GETC gridGetC
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.equ STDIO_PUTC gridPutC
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.inc "stdio.asm"
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; *** BASIC ***
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; RAM space used in different routines for short term processing.
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.equ SCRATCHPAD_SIZE STDIO_BUFSIZE
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.equ SCRATCHPAD STDIO_RAMEND
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.inc "lib/util.asm"
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.inc "lib/ari.asm"
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.inc "lib/parse.asm"
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.inc "lib/fmt.asm"
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.equ EXPR_PARSE parseLiteralOrVar
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.inc "lib/expr.asm"
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.inc "basic/util.asm"
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.inc "basic/parse.asm"
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.inc "basic/tok.asm"
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.equ VAR_RAMSTART SCRATCHPAD+SCRATCHPAD_SIZE
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.inc "basic/var.asm"
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.equ BUF_RAMSTART VAR_RAMEND
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.inc "basic/buf.asm"
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.equ BAS_RAMSTART BUF_RAMEND
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.inc "basic/main.asm"
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init:
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di
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im 1
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ld sp, RAMEND
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call gridInit
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call padInit
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call vdpInit
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call basInit
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jp basStart
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FNT_DATA:
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.bin "fnt/7x7.bin"
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.fill 0x7ff0-$
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.db "TMR SEGA", 0x00, 0x00, 0xfb, 0x68, 0x00, 0x00, 0x00, 0x4c
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