mirror of
https://github.com/curioustorvald/tsvm.git
synced 2026-03-07 19:51:51 +09:00
38 lines
1007 B
JavaScript
38 lines
1007 B
JavaScript
if (!_TVDOS) {
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println("This program can only run on TVDOS")
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return 1
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}
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if (!exec_args[1]) {
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println("Usage: dumpfont <rom_prefix>")
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println(" e.g. if rom_prefix is 'home/myfont', the output files will be 'home/myfont_low.chr' and 'home/myfont_high.chr'")
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return 1
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}
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let lowfilename = exec_args[1] + "_low.chr"
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let highfilename = exec_args[1] + "_high.chr"
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let workarea = sys.malloc(1920)
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// dump low rom
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sys.poke(-1299460, 16)
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for (let i = 0; i < 1920; i++) {
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let byte = sys.peek(-1300607 - i)
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sys.poke(workarea + i, byte)
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}
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filesystem.open("A", lowfilename, "W")
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dma.ramToCom(workarea, filesystem._toPorts("A")[0], 1920)
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println("Wrote CHR rom " + lowfilename)
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// dump high rom
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sys.poke(-1299460, 17)
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for (let i = 0; i < 1920; i++) {
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let byte = sys.peek(-1300607 - i)
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sys.poke(workarea + i, byte)
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}
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filesystem.open("A", highfilename, "W")
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dma.ramToCom(workarea, filesystem._toPorts("A")[0], 1920)
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println("Wrote CHR rom " + highfilename)
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sys.free(workarea) |