mirror of
https://github.com/garrettsworkshop/GWRAM.SYSTEM.git
synced 2024-11-05 21:04:34 +00:00
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* ram2e_max_bitbang(...) sends the "Set UFM Bitbang Outputs" to the RAM2E */
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static void ram2e_max_bitbang(char bitbang) { ram2e_cmd(0xEA, bitbang); }
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/* ram2e_max_program(...) sends the "UFM Program Once" command to the RAM2E */
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static void ram2e_max_program() { ram2e_cmd(0xEF, 0x00); }
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/* ram2e_max_erase(...) sends the "UFM Erase Once" command to the RAM2E */
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static void ram2e_max_erase() { ram2e_cmd(0xEE, 0x00); }
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/* ram2e_max_save(...) */
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static void ram2e_max_save(char mask, char enled) {
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char wmask;
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// Encode 0xFF mask properly
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if (mask == 0xFF) { wmask = 0x80; }
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else { wmask = mask; }
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// Shift mask into UFMD
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ram2e_max_bitbang(0x80 | ((wmask >> 1) & 0x40));
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ram2e_max_bitbang(0x80 | ((wmask >> 0) & 0x40));
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ram2e_max_bitbang(0x80 | ((wmask << 1) & 0x40));
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ram2e_max_bitbang(0x80 | ((wmask << 2) & 0x40));
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ram2e_max_bitbang(0x80 | ((wmask << 3) & 0x40));
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ram2e_max_bitbang(0x80 | ((wmask << 4) & 0x40));
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ram2e_max_bitbang(0x80 | ((wmask << 5) & 0x40));
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ram2e_max_bitbang(0x80 | ((wmask << 6) & 0x40));
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// Shift mask into UFMD
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if (( enled && (wmask >> 7)) ||
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(!enled && !(wmask >> 7))) {
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ram2e_max_bitbang(0x80);
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} else { ram2e_max_bitbang(0xC0); }
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ram2e_max_bitbang(0xC0);
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ram2e_max_bitbang(0xC0);
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ram2e_max_bitbang(0xC0);
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ram2e_max_bitbang(0xC0);
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ram2e_max_bitbang(0xC0);
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ram2e_max_bitbang(0xC0);
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ram2e_max_bitbang(0xC0);
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// Program UFM
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ram2e_max_program();
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}
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