--- np2/i286a/i286a_i.s 2003/12/18 13:21:32 1.3 +++ np2/i286a/i286a_i.s 2003/12/20 10:27:55 1.7 @@ -2,8 +2,12 @@ INCLUDE i286a.inc IMPORT i286core - IMPORT i286_memorywrite_w + IMPORT i286a_memoryread + IMPORT i286a_memorywrite_w EXPORT i286a_localint + EXPORT i286a_trapint + IMPORT i286a_trapintr + EXPORT i286a_interrupt AREA .text, CODE, READONLY @@ -15,18 +19,18 @@ i286a_localint ldrh r4, [r9, #CPU_SP] sub r4, r4, #(2 << 16) mov r1, r8 add r0, r5, r4 lsr #16 - bl i286_memorywrite_w + bl i286a_memorywrite_w sub r4, r4, #(2 << 16) ldrh r1, [r9, #CPU_CS] add r0, r5, r4 lsr #16 - bl i286_memorywrite_w + bl i286a_memorywrite_w sub r4, r4, #(2 << 16) mov r1, r8 lsr #16 mov r4, r4 lsr #16 sub r8, r8, r1 lsl #16 add r0, r4, r5 strh r4, [r9, #CPU_SP] - bl i286_memorywrite_w + bl i286a_memorywrite_w mov r0, #0 ldr r1, [r9, r6 lsl #2] strb r0, [r9, #CPU_TRAP] @@ -38,5 +42,78 @@ i286a_localint ldrh r4, [r9, #CPU_SP] str r2, [r9, #CPU_CS_BASE] mov pc, r11 +i286a_trapint ldrh r4, [r9, #CPU_SP] + ldr r5, [r9, #CPU_SS_BASE] + CPUWORK #20 + mov r4, r4 lsl #16 + sub r4, r4, #(2 << 16) + mov r1, r8 + add r0, r5, r4 lsr #16 + bl i286a_memorywrite_w + sub r4, r4, #(2 << 16) + ldrh r1, [r9, #CPU_CS] + add r0, r5, r4 lsr #16 + bl i286a_memorywrite_w + sub r4, r4, #(2 << 16) + mov r1, r8 lsr #16 + mov r4, r4 lsr #16 + sub r8, r8, r1 lsl #16 + add r0, r4, r5 + strh r4, [r9, #CPU_SP] + bl i286a_memorywrite_w + mov r0, #0 + ldr r1, [r9, #4] + strb r0, [r9, #CPU_TRAP] + bic r8, r8, #(T_FLAG + I_FLAG) + mov r0, r1 lsr #16 + orr r8, r8, r1 lsl #16 + mov r2, r0 lsl #4 + strh r0, [r9, #CPU_CS] + str r2, [r9, #CPU_CS_BASE] + b i286a_trapintr + + +i286a_interrupt ldr r1, iai_r9 + stmdb sp!, {r4 - r9, lr} + mov r9, r1 + mov r6, r0 + CPULD + ldr r5, [r9, #CPU_CS_BASE] + ldrh r4, [r9, #CPU_SP] + CPUWORK #20 + add r0, r5, r8 lsr #16 + ldr r5, [r9, #CPU_SS_BASE] + bl i286a_memoryread + mov r4, r4 lsl #16 + cmp r0, #&f4 + addeq r8, r8, #(1 << 16) + sub r4, r4, #(2 << 16) + mov r1, r8 + add r0, r5, r4 lsr #16 + bl i286a_memorywrite_w + sub r4, r4, #(2 << 16) + ldrh r1, [r9, #CPU_CS] + add r0, r5, r4 lsr #16 + bl i286a_memorywrite_w + sub r4, r4, #(2 << 16) + mov r1, r8 lsr #16 + mov r4, r4 lsr #16 + sub r8, r8, r1 lsl #16 + add r0, r4, r5 + strh r4, [r9, #CPU_SP] + bl i286a_memorywrite_w + mov r0, #0 + ldr r1, [r9, r6 lsl #2] + strb r0, [r9, #CPU_TRAP] + bic r8, r8, #(T_FLAG + I_FLAG) + mov r0, r1 lsr #16 + orr r8, r8, r1 lsl #16 + mov r2, r0 lsl #4 + strh r0, [r9, #CPU_CS] + str r2, [r9, #CPU_CS_BASE] + CPUSVC + ldmia sp!, {r4 - r9, pc} +iai_r9 dcd i286core + CPU_SIZE + END